• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)

Weight per GB/T 706-2016 standard tables. Actual weight may vary ±2% per bar due to rolling tolerance.

Chemical Composition (Heat Analysis, % max)

Q255A chemistry is essentially the same as Q255B; the difference is impact testing: B grade requires 27J at 20°C, A grade has no impact requirement. For tower structures, building frames, and general construction, Q255A is the standard grade. For service below 0°C or critical welded structures, specify Q255B or Q255C.

Mechanical Properties

Manufacturing Standards & Equivalents

Q255A is a uniquely Chinese grade widely used in domestic construction and export markets. For international specification conversion, Q255A is most equivalent to S275JR in yield strength (275 MPa) and ASTM A36 in overall property profile. For high-impact applications, specify Q255D (impact at -20°C).

Common Applications

• Transmission towers and power line structures: Main legs, cross-arms, and bracing for 35kV-1000kV transmission towers — the dominant global use case for Q255A
• Communication towers: Cell phone towers, broadcast towers, microwave towers
• Building frames and bracings: Secondary structural members, wall bracings, roof truss members
• Industrial equipment supports: Pipe racks, equipment frames, conveyor supports
• Storage racking systems: Heavy-duty pallet rack frames, drive-in rack uprights
• Crane and hoist structures: Crane girders, hoist towers, gantry supports
• Bridge secondary members: Deck bracings, wind bracing, maintenance walkways
• General fabrication: Light towers, sign posts, fence posts, trailer frames

Welding & Fabrication

Q255A angle bar is readily weldable with common arc welding processes:

• SMAW (stick): E4303 (J422) for general welding, E4315 (J427) for low temperature
• GMAW (MIG/MAG): ER50-6 (ER70S-6) wire with 80% Ar/20% CO₂ shielding
• FCAW (flux-core): E501T-1 for high-speed structural welding
• GTAW (TIG): ER50-6 / ER70S-6 for root pass and precision joints

Preheat: Generally not required for Q255A at room temperature, due to low carbon equivalent (0.35-0.40%). For 25 mm+ thickness or low ambient temperature (< 5°C), preheat to 50-100°C to remove moisture and ensure weld quality.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Hot-dip galvanizing: Q255A is one of the most commonly galvanized steel grades worldwide. The silicon content (0.35% max) is in the optimal range for traditional galvanizing without excessive coating growth. The Sandelin effect (which causes rough galvanized coating in 0.04-0.12% Si range) is avoided, ensuring smooth, uniform coating thickness.

Quality Assurance & Mill Test Certificate

Every shipment of Q255A angle bar is supplied with comprehensive quality documentation:

• EN 10204 3.1 Mill Test Certificate with heat analysis, mechanical properties, dimensional inspection, and bend test results
• Heat number traceability on each bundle (heat number stenciled on at least one bar per bundle)
• Dimensional inspection per GB/T 706: leg length, thickness, leg-to-leg squareness, length, straightness, twist
• Surface condition report per GB/T 700 / GB/T 706 Class A (best, no repair) or B (minor repair allowed)
• Third-party inspection (SGS, BV, TUV) optional and welcomed at mill

Mill capability certificates (ISO 9001, ISO 14001, OHSAS 18001) are available on request. Most of our partner mills are also certified to EN 10025 and can supply dual-certified Q255A + S275JR for European customers.

Packaging & Shipping

Q255A angle bar is shipped in bundles:

• Bundle weight: 1-3 tons typical, max 5 tons per bundle
• Bundle strapping: Steel bands at 2-3 locations per bundle, with 4-way entry for forklift
• Surface protection: Optional VCI paper wrap, anti-rust oil, or mill primer
• 20ft container: Max 20-25 tons, depending on bar size (smaller bars pack denser)
• 40ft container: Max 25-27 tons
• Bulk vessel: For orders > 1,000 tons, loaded by ship’s crane with bundle lifting slings

Lead time: 15-30 days for standard sizes, 30-45 days for special lengths, hot-dip galvanizing, or large quantities. We can hold buffer stock for repeat customers to reduce lead time to 7-15 days.

Why Choose Huaxia-Steel for Q255A Angle Bar?

• Mill-direct pricing: 10-20% lower than EU/US service centers, with full FOB China pricing
• Wide dimensional range: 20×20 – 200×200 mm, thickness 3-24 mm, equal and unequal legs
• Custom lengths: Cut-to-length 4-18 m, eliminating waste at the job site
• Galvanizing service: In-house hot-dip galvanizing available for full container loads
• Quality assurance: EN 10204 3.1 MTC, dimensional inspection, third-party inspection welcomed
• Global export experience: Major supplier to transmission tower projects in 40+ countries (Africa, Middle East, Southeast Asia, Latin America)

Get a quotation: Send your specification (size, thickness, length, surface treatment, quantity, delivery port) to our sales team. We will respond with a competitive FOB/CIF price within 24 hours and can provide a sample MTC and mill reference list for your evaluation.

Q255A Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

Q255A carbon steel angle bar is a medium-strength structural carbon steel angle widely used in China and exported worldwide for transmission towers, communication towers, building frames, industrial equipment supports, and general construction. With 255 MPa minimum yield strength and 410-540 MPa tensile strength, Q255A fills the strength gap between Q235B (235 MPa) and Q275 (275 MPa), making it ideal for tower structures and bracings that require higher load-bearing capacity than mild steel. Huaxia-Steel supplies Q255A equal-leg angle bars in 20×20 mm through 200×200 mm cross-sections, with thickness from 3 mm to 24 mm, directly from GB/T 700-certified Chinese mills with full EN 10204 3.1 mill test certificates.

Product Overview

Q255A is part of the Chinese GB/T 700 carbon structural steel standard. The “Q” stands for yield strength (Q = Qu, 屈), “255” is the minimum yield in MPa, and “A” is the quality grade for impact toughness (A = no impact requirement, B = 20°C, C = 0°C, D = -20°C). For higher impact requirements, Q255B/C/D grades are available at slightly higher cost.

Our Q255A angle bars are produced by hot rolling in continuous angle mills, with leg lengths from 20 mm to 200 mm and thicknesses from 3 mm to 24 mm. Both equal-leg and unequal-leg sections are available; this product page focuses on the most common equal-leg angle (L-shape with both legs the same length).

Specifications & Dimensional Range

Common Sizes — Per-Meter Weight (Q255A Equal Angle)