ASTM A283 Grade B Steel Plate: Mild Carbon Structural Material for General Fabrication

Posted:2026-01-29 08:35:32

ASTM A283 Grade B is a mild-strength carbon steel plate designed for general structural applications requiring moderate strength and good forming performance. With slightly higher strength than Grade A, A283 Grade B offers stable weldability, reliable ductility, and cost-effective performance for construction, fabrication, and engineering components.

Chemical Composition

Element	C	Mn	P	S	Cu
Max %	≤0.17	≤0.90	≤0.035	≤0.040	≤ 0.20

Mechanical Properties

Yield Strength	Tensile Strength	Elongation
≥ 205 MPa	380–515 MPa	≥ 22–27%

Applications
General structural components
Welded parts and fabrication work
Building supports and brackets
Light-duty engineering structures
Tanks, covers, and non-pressure plates

Delivery & Certification
Hot-rolled delivery condition
Mill Test Certificate (EN 10204 3.1) available
Supports cutting, bending, welding, drilling
Stable global supply and stock
Produced via open-hearth, basic-oxygen, or electric-furnace steelmaking per ASTM A283

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