Product Overview
ASTM A572 carbon steel plate is a high-strength, low-alloy (HSLA) structural steel plate designed for applications requiring greater strength-to-weight ratios than standard carbon steel. The A572 specification covers five grades (42, 50, 55, 60, and 65) with yield strengths ranging from 290 MPa to 450 MPa, making it suitable for bridges, buildings, construction equipment, and transmission towers. Huaxia-Steel supplies A572 steel plates in thicknesses from 3 mm to 150 mm, with comprehensive certification and third-party inspection options.
Grade 50 is the most widely used A572 plate, offering an optimal balance of strength, weldability, and cost. It is commonly specified as a replacement for A36 in structural applications where weight reduction or higher load capacity is required. All our A572 plates are produced with fine-grain practice and normalized or controlled-rolled condition to ensure uniform mechanical properties throughout the plate.
Specifications
Grade Overview
| Grade | Min Yield (MPa) | Min Tensile (MPa) | Max Thickness (mm) | Typical Application |
|---|---|---|---|---|
| A572 Gr 42 | 290 | 415 | 150 | General structural |
| A572 Gr 50 | 345 | 450 | 100 | Bridges, buildings, equipment |
| A572 Gr 55 | 380 | 485 | 50 | High-strength structural |
| A572 Gr 60 | 415 | 520 | 32 | Heavy equipment, mining |
| A572 Gr 65 | 450 | 550 | 32 | Maximum strength structural |
Standard Dimensions
| Thickness (mm) | Width (mm) | Length (mm) | Weight (kg/m² per mm) |
|---|---|---|---|
| 3-5 | 1000-2000 | 2000-12000 | 7.85 |
| 6-12 | 1000-2500 | 2000-12000 | 7.85 |
| 13-25 | 1500-3000 | 3000-12000 | 7.85 |
| 26-50 | 1500-3000 | 3000-12000 | 7.85 |
| 51-100 | 1500-3000 | 3000-10000 | 7.85 |
| 101-150 | 1500-2800 | 3000-8000 | 7.85 |
Chemical Composition (Grade 50)
| Element | Max (%) | Function |
|---|---|---|
| Carbon (C) | 0.23 | Strength |
| Manganese (Mn) | 1.35 | Strength, hardenability |
| Phosphorus (P) | 0.04 | Impurity control |
| Sulfur (S) | 0.05 | Impurity control |
| Silicon (Si) | 0.40 (max) | Deoxidation |
| Niobium (Nb) | 0.005-0.05 | Microalloying for grain refinement |
| Vanadium (V) | 0.01-0.15 | Microalloying for strength |
Dimensional Tolerances (per ASTM A6)
| Thickness | Tolerance (≤1500mm width) | Tolerance (>1500mm width) |
|---|---|---|
| 3-5mm | ±0.20 mm | ±0.25 mm |
| 6-10mm | ±0.25 mm | ±0.30 mm |
| 11-25mm | ±0.30 mm | ±0.40 mm |
| 26-50mm | ±0.50 mm | ±0.60 mm |
| 51-100mm | ±0.80 mm | ±0.90 mm |
Available Grades & Equivalents
| ASTM A572 Grade | EN Equivalent | GB Equivalent | JIS Equivalent |
|---|---|---|---|
| Gr 42 | S275N | Q275 | SM400A |
| Gr 50 | S355N | Q345B/Q355B | SM490A |
| Gr 55 | S355N/ML | Q390 | SM490YA |
| Gr 60 | S420N | Q420 | SM520B |
| Gr 65 | S460N | Q460 | SM570 |
Manufacturing Standards
- ASTM A572/A572M: Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
- ASTM A6/A6M: General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
- ASTM A370: Test Methods and Definitions for Mechanical Testing of Steel Products
- AWS D1.1: Structural Welding Code — Steel (for fabrication guidelines)
Applications
- Structural construction: Building frames, columns, beams, and bracing members
- Bridge construction: Girder plates, deck plates, and bridge components
- Heavy equipment: Crane booms, excavator components, loader frames
- Transmission infrastructure: Transmission towers, substation structures
- Railroad: Flatcars, hopper cars, rail components
- Offshore & marine: Platform structures, jacket members (with supplementary requirements)
Quality Assurance
- Chemical analysis: Per heat, verified by OES spectrometry
- Mechanical testing: Tensile + yield + elongation per ASTM A370; one test per heat per thickness
- Impact testing: Charpy V-notch available at specified temperatures (0°C, -20°C, -40°C)
- Ultrasonic testing: Per ASTM A435 or EN 10160 (S2E2 or as specified)
- Heat treatment: Normalized (N) or controlled-rolled (CR) per specification
- Documentation: EN 10204 3.1 MTC standard; 3.2 with SGS/BV/TUV inspection
Packaging & Shipping
- Packaging: Plates bundled with steel straps on wooden skids; VCI paper for sea freight
- Stacking: Maximum 5-6 plates per bundle (depending on thickness), weight 5-20 MT per bundle
- Container loading: 20ft container ~20-25 MT; 40ft container ~25-28 MT; breakbulk for plates >12m
- Surface protection: Primer coating (zinc-rich or epoxy) available on request
- Marking: Steel stamp on each plate with heat number, grade, and dimensions
Why Choose Huaxia-Steel?
Huaxia-Steel is a direct factory supplier of ASTM A572 steel plates with extensive experience serving international structural steel markets. We offer mill-direct pricing, flexible thickness and width options, and comprehensive quality documentation. Our in-house logistics team handles all aspects of export shipping, from FOB to DAP, with complete customs documentation. Third-party inspection by SGS, BV, or TUV can be arranged at competitive rates.
Request a quote today — provide your required grade, thickness, width, length, quantity, and destination port for a detailed quotation within 24 hours.
