ASTM A514 Grade R High‑Strength Quenched & Tempered Steel Plate

Posted:2026-05-15 15:37:14

ASTM A514 Grade R is a high‑strength quenched and tempered alloy steel plate engineered for structural components requiring superior strength‑to‑weight performance and excellent resistance to dynamic loading. With a minimum yield strength of 690 MPa, Grade R delivers stable weldability, reliable toughness, and consistent dimensional accuracy, making it suitable for lifting equipment, heavy machinery frames, bridge structures, and precision‑fabricated assemblies.
Chemical Composition

Element	C	Mn	P	S	Si	Cr	Mo	V
Max %	≤ 0.21	≤1.00	≤ 0.035	≤ 0.035	≤ 0.60	0.40–0.65	0.15-0.25	0.01–0.08

Mechanical Properties

Property	Yield Strength	Tensile Strength	Elongation	Hardness
Requirement	≥ 690MPa	760-895MPa	≥ 18%	Typical 235–293 HBW

Applications

Lifting and hoisting equipment
Heavy machinery and industrial frames
Bridge and structural assemblies
High‑load welded components
Precision‑fabricated high‑strength parts

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