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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.

Supplier