SA302 Grade A Plate

Manganese‑molybdenum alloy steel plate engineered for welded boilers and pressure-vessel fabrication. Conforming to ASME SA302 Grade A (A302 A), the plate is supplied as a fully killed steel with enhanced mechanical strength and toughness for high‑temperature, high‑pressure service.

Key mechanical properties

• Minimum yield strength: 310 MPa
• Tensile strength: 515–655 MPa

Standards & compliance

• ASME SA302 Grade A (A302 A)
• Original mill test certificate issued under EN 10204

Quality control & available tests/services

• High-tension (tensile) testing
• Low-temperature impact testing
• Normalizing for plates thicker than 40 mm
• Simulated post-weld heat treatment (PWHT)
• Rolling to NACE MR0175 requirements where required (HIC + SSCC)
• Cutting, shot blasting, painting and welding to end-user specifications

Typical applications

• Industrial and utility boilers
• Pressure vessels and heat-exchangers
• Heavy fabrications where high strength and post-weld performance are required
• Marine and shipbuilding structural components, where alloy performance is needed

Supply options

Plates can be supplied with full traceability documentation (mill test certificate) and processed (cut-to-size, surface preparation, painting or welding) per purchaser requirements. Contact your supplier to confirm available thicknesses, plate sizes and lead times.