ASTM A299 Grade B Steel Plates

High-strength carbon-manganese steel plate produced to ASTM A299 / ASME SA299 for welded boilers, pressure vessels and other pressure-containing applications. Grade B offers higher yield and tensile strength than Grade A while retaining good weldability and formability.

Key features

• Specification: ASTM A299 / ASME SA299
• Grade: A299 Grade B (manganese-silicon carbon steel)
• Typical supply conditions: as-rolled (standard); normalized or stress-relieved on request for specific fabrication requirements
• Typical size range: thicknesses up to 260 mm; widths 1,000–4,000 mm; lengths up to 18,000 mm (custom sizes available)
• Minimum order quantity: 5 pieces
• Mill Test Certificate: EN 10204 supplied with each plate
• Stock & lead time: immediate stock available or 10–40 days for production
• Packing & delivery: mill ex-works or export-ready packing
• Payment terms: T/T or L/C

Applications

Designed for welded boilers, pressure vessels, heat exchangers and other welded pressure equipment where higher strength carbon-manganese steel plates are required.

Why choose this product

• Manufactured to a recognized international standard for predictable mechanical properties and quality control
• Multiple supply conditions available to meet welding and post-weld requirements
• Full material certification (MTC) ensures traceability for B2B procurement and regulatory compliance

Send an RFQ with required grade, thickness, dimensions, quantity and delivery destination to receive competitive pricing and lead time information.