High-strength, low-alloy (HSLA) structural steel plate manufactured to ASTM A572 specifications for heavy structural use. Grade 50 (A572 Gr50) provides significantly higher yield strength than standard A36 steel—making it a preferred choice for bridges, buildings, heavy equipment frames, crane rails, and other load-bearing structural components.
Key features
- Standards: Manufactured to ASTM A572 (grades offered: Gr42, Gr50, Gr55, Gr60, Gr65).
- Mechanical performance: A572 Grade 50 offers a minimum yield strength of approximately 345 MPa (50 ksi), delivering improved load capacity while reducing structure weight compared with A36.
- Available forms: Plates, coils, sheets, shim stock, flats and bars.
- Typical sizes:
- Thickness: 8 mm – 300 mm
- Width: 1500 mm – 4020 mm
- Length: 3000 mm – 27,000 mm
- Finishes and surface conditions: Hot-rolled plate (HR), cold-rolled sheet (CR), 2B, 2D, BA, NO.8, satin finish, and plastic-coated options.
- Hardness/temper options: Soft, half-hard, quarter-hard, hard, spring-hard (selection depends on product form and end-use).
- Joining and fabrication: Designed for standard structural joining methods including welding and bolting; suitable for cutting, forming and machining per typical structural steel practices.
Quality and testing (value-added services)
- Mill Test Certificate (MTC) available on request
- Mechanical testing: tensile testing, hardness testing
- Chemical verification: spectrochemical analysis, Positive Material Identification (PMI)
- Metallurgical inspection: macro/micro examination, flattening tests, flaring tests
- Corrosion resistance checks: pitting resistance, intergranular corrosion (IGC) testing
- Custom services: cut-to-size, edge preparation, surface treatment and protective packing for export
Ordering and RFQ guidance
To request a quote, please specify: desired ASTM grade, thickness x width x length (or plate dimensions), required finish, quantity (tons or pieces), any certification or test-report requirements, and preferred delivery/packing. Lead times and pricing vary with grade, plate size and finishing requirements.
Applications
Commonly used in structural steelwork, bridges, buildings, transmission towers, construction equipment, heavy frames, and other structural components requiring high strength-to-weight performance.
