ASME SA A302 Grade D Plate

High-strength manganese–molybdenum alloy steel plates engineered for welded boilers, pressure vessels and heavy-duty structural applications. These ASME-grade plates are supplied to meet the mechanical and inspection requirements typical of SA A302 Grade D material and are suitable where high yield and good toughness are required.

Key mechanical properties

• Minimum yield strength: 345 MPa
• Tensile strength range: 550–690 MPa
• Fully killed steel with Mn–Mo alloying to improve strength and toughness

Quality, inspection and heat treatment options

• Mill test certificate issued to EN 10204 standard (original MTC available)
• High-tension (tensile) testing
• Low-temperature impact (Charpy) testing for toughness verification
• Normalizing for thicknesses over 40 mm
• Simulated post-weld heat treatment (PWHT) where required
• Manufacturing and rolling available to meet NACE MR0175 requirements (including HIC and SSCC controls) for sour-service suitability

Processing and finishing services (available on request)

• Shot blasting and primer/paint systems
• Cutting to size, beveling and edge preparation
• Welding to customer specifications
• Custom fabrication and further machining as required

Typical applications

• Industrial boilers and pressure vessels
• Petrochemical and power generation plants
• Offshore and marine structures where high toughness is required
• Heavy fabrication, structural and transportation components

Ordering and supply

• Standard mill certificates and test reports provided with shipments
• For pricing, lead time and available plate sizes / thicknesses please submit an RFQ with required dimensions, quantity and any specified tests or certifications.