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

Posted:2026-04-24 17:34:16

ASTM A514 Grade M is a high‑strength quenched and tempered alloy steel plate designed for structural components requiring exceptional strength‑to‑weight performance, stable toughness, and reliable behavior under heavy or dynamic loading conditions. With its elevated yield strength and uniform mechanical properties, A514 Gr.M is widely used in lifting equipment, engineered frames, heavy machinery, and industrial structures where reduced weight and high structural integrity are essential. The grade maintains predictable weldability and consistent forming characteristics, supporting precision fabrication and demanding engineering applications.
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 frames
High‑load structural components
Bridge and engineered assemblies
Precision‑fabricated high‑strength parts

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