a299 grade b steel plate,sa299 grade b steel plate stock

Supply-grade flat-rolled carbon steel plate produced to ASTM A299/A299M and available in Grade A and Grade B (equivalent to ASME SA299 Grade A / Grade B). Grade B material is supplied normalized when thickness exceeds 40 mm to meet the specification's heat-treatment requirement, ensuring consistent microstructure and toughness through the plate thickness.

Key features

• Conforms to ASTM A299/A299M; equivalent to ASME SA299
• Available grades: A and B
• Normalized heat treatment applied to Grade B when thickness > 40 mm
• Supplied as hot-rolled flat plates in standard industrial plate sizes; cut-to-length and blanking services available on request
• Mill Test Certificates (MTC) and material traceability provided with shipments

Why choose this material

ASTM A299 plates are specified where robust, non-alloy carbon steel plate is required for heavy fabrication and engineering applications. The Grade B normalized option gives improved toughness and uniform mechanical properties for thicker sections. Stocked and supplied in plate form for use in structural components, pressure-containing fabrications and heavy engineering assemblies.

Ordering and options

We supply plates in standard mill finish with options for cutting, flame/plasma profiling, edge preparation and protective packaging. For quotes, provide required grade (A or B), thickness, plate dimensions and surface/processing requirements so we can confirm availability and lead time.