SS400 Carbon Steel Angle Bar — Factory Direct Supplier | Huaxia-Steel

JIS Standard Equal & Unequal Angle Steel for Construction, Fabrication & Export

SS400 carbon steel angle bars (JIS G3101) are L-shaped structural steel sections widely used in construction, fabrication, and infrastructure projects across Southeast Asia, the Middle East, and Africa. With excellent weldability, machinability, and cost efficiency, SS400 angle bars are the backbone of structural steel supply.

Huaxia-Steel supplies SS400 equal and unequal angle bars in sizes from 25×25 mm to 200×200 mm, in lengths up to 12 meters, with full mill test certificates and ISO 9001 quality assurance.

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SS400 Carbon Steel Angle Bar — Quick Specs

Property	Value
Grade	SS400 (JIS G3101)
Equivalent Standards	GB Q235B / EN S235JR / ASTM A36 / DIN ST37-2
Type	Equal Angle / Unequal Angle
Size Range	25x25x3 mm to 200x200x24 mm (equal)
Unequal Range	45×30 to 200×125 mm
Length	6 m / 9 m / 12 m (cut-to-size available)
Surface	Hot-Rolled (black), Galvanized, Pre-painted
MOQ	5 tons (sample orders welcome)
Delivery Time	7–15 days stock, 20–30 days custom
Certification	EN 10204 3.1/3.2 MTC, ISO 9001

Chemical Composition of SS400

Element	C (max)	Si (max)	Mn (max)	P (max)	S (max)
SS400	0.17	—	1.40	0.050	0.050

SS400 has no strict silicon requirement, but the controlled carbon and manganese content provides excellent structural performance. The low carbon content ensures superior weldability without preheating.

Mechanical Properties

Property	Thickness ≤16 mm	16–40 mm	40–100 mm
Yield Strength (MPa)	≥ 235	≥ 225	≥ 215
Tensile Strength (MPa)	400–510	400–510	400–510
Elongation (%)	≥ 21	≥ 21	≥ 20
Bend Test	180° (d=1.5a)	180° (d=1.5a)	180° (d=2a)

**Need specific angle bar specifications?** Send us your requirements →

Available Sizes — Equal Angle Bars

Size (mm)	Thickness (mm)	Section Area (cm²)	Weight (kg/m)
25×25	3–4	1.43–1.86	1.12–1.46
30×30	3–5	1.75–2.78	1.37–2.18
40×40	3–5	2.36–3.79	1.85–2.97
50×50	4–6	3.89–5.69	3.05–4.47
63×63	4–8	4.98–9.52	3.91–7.47
75×75	5–9	7.34–12.83	5.76–10.07
100×100	6–12	11.93–22.80	9.37–17.90
125×125	8–14	19.75–33.37	15.50–26.19
150×150	10–18	29.37–50.47	23.06–39.61
200×200	14–24	54.64–89.62	42.89–70.35

Popular Sizes in Stock

Size	Length	Surface	Availability
50x50x5 mm	6 m	Hot-Rolled	✅ In Stock
63x63x6 mm	6 m / 9 m	Hot-Rolled	✅ In Stock
75x75x7 mm	6 m / 9 m	Hot-Rolled	✅ In Stock
100x100x10 mm	9 m / 12 m	Hot-Rolled	✅ In Stock
125x125x10 mm	12 m	Galvanized	✅ In Stock
150x150x12 mm	12 m	Hot-Rolled	✅ In Stock

Available Sizes — Unequal Angle Bars

Size (mm)	Thickness (mm)	Weight (kg/m)
45×30	4–6	2.20–3.20
56×36	4–6	2.81–4.10
63×40	5–7	3.92–5.32
75×50	5–8	4.77–7.43
100×63	6–10	7.55–12.14
125×80	7–12	11.06–18.30
150×90	9–15	16.45–26.40
200×125	12–18	29.77–43.49

**Looking for a specific unequal angle size?** Check availability →

SS400 Equivalent Grades

Standard	Grade	Standard Body	Primary Market
JIS G3101	SS400	Japan	Japan, SE Asia
GB/T 700	Q235B	China	China, Asia
EN 10025	S235JR	Europe	EU, Middle East
ASTM A36	A36	USA	North America
DIN 17100	ST37-2	Germany	Germany, EU
AS/NZS	300	Australia	Australia, NZ

Applications of SS400 Angle Bars

Construction & Building

Structural framing and bracing
Roof trusses and support beams
Wall studs and partition framing
Stair stringers and handrails

Infrastructure

Transmission towers and telecom masts
Bridge railings and guardrails
Highway sign structures
Railway platform structures

Fabrication & Manufacturing

Machinery frames and equipment supports
Conveyor structures
Storage rack systems
Platform and walkway grating supports

Export & Project Supply

Power plant construction projects
Oil & gas facility structures
Mining infrastructure
Shipbuilding components

Why Choose Huaxia-Steel?

1. Comprehensive Size Range

From 25×25 mm mini angles to 200×200 mm heavy structural angles, we cover the full spectrum of JIS standard sizes — plus custom unequal angles.

2. Surface Treatment Options

Hot-rolled (black finish) — standard industrial use
Galvanized (hot-dip, 60–275 g/m²) — corrosion resistance
Pre-painted — architectural applications
Oiled — temporary rust protection during shipping

3. Cut-to-Size Service

Precision cutting to your specified lengths:

Standard lengths: 6m, 9m, 12m
Custom cut: 1m – 12m
Tolerance: ±2mm (standard), ±1mm (precision)

4. Global Export Capability

Exported to 60+ countries
Full documentation: CO, MTC, packing list, B/L
FOB, CIF, DDP terms available
Bonded warehouse storage available

5. Quality Assurance

Dimensional inspection per JIS G3192
Surface quality per JIS G3193
Full MTC per EN 10204 3.1/3.2
Third-party inspection: SGS, BV, TÜV

Manufacturing Process

Billet Heating (1150°C) → Roughing Mill → Finishing Mill → Cooling Bed → Straightening → Cutting to Length → Surface Inspection → Bundling → Export Packaging

Our SS400 angle bars are hot-rolled from continuous-cast billets, ensuring uniform cross-section dimensions and consistent mechanical properties along the entire length.

Quality Inspection Standards

Inspection	Standard	Method
Dimensional	JIS G3192	Caliper + gauge
Surface Quality	JIS G3193	Visual + magnetic particle
Tensile Test	JIS Z2241	Universal testing machine
Bend Test	JIS Z2248	180° bend
Chemical Analysis	JIS G1253	Spectrometer
Straightness	JIS G3192	≤0.4% of length

Packaging & Shipping

Package Type	Description
Standard Bundle	2–3 ton bundles, steel strap (4 bands), tag
Export Bundle	Wooden dunnage, anti-rust paper, 4–6 steel straps
Custom	Per customer spec (paint marking, bar coding, etc.)

**Container Loading:**

20ft GP: ~22 tons (6m lengths)
40ft GP: ~25 tons (6m lengths)
40ft OT: ~25 tons (12m lengths)
Break Bulk: up to 5,000 tons per shipment

Frequently Asked Questions

**Q: What is the difference between SS400 and Q235B angle bars?** A: SS400 (JIS) and Q235B (GB) are essentially equivalent grades with minor specification differences. SS400 is preferred for Japanese and Southeast Asian markets, while Q235B is the Chinese domestic standard. Both can be supplied with dual certification.

**Q: Can you supply galvanized angle bars?** A: Yes. We offer hot-dip galvanized SS400 angle bars with zinc coating of 60–275 g/m², suitable for outdoor and corrosive environments.

**Q: What is the standard length for angle bars?** A: Standard lengths are 6m, 9m, and 12m. Custom cut-to-length service is available with ±2mm tolerance.

**Q: Do you provide unequal angle bars?** A: Yes, we supply both equal angles (25×25 to 200×200 mm) and unequal angles (45×30 to 200×125 mm). Custom sizes are available for mill orders.

**Q: How are angle bars packaged for export?** A: Bars are bundled in 2–3 ton packs with steel strapping, wooden dunnage, and anti-rust paper. Tags show heat number, size, and quantity for traceability.