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

Posted:2026-04-03 13:24:11

ASTM A514 Grade H is a high‑strength quenched and tempered alloy steel plate developed for structural components requiring excellent strength‑to‑weight efficiency, stable toughness, and reliable performance under demanding service conditions. With its elevated yield strength and uniform mechanical behavior, A514 Gr.H is widely used in heavy machinery, lifting equipment, engineered frames, and structural assemblies subjected to high stress or dynamic loading. The grade maintains consistent weldability and predictable forming characteristics, making it suitable for precision fabrication and high‑load industrial 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

Heavy construction machinery
Lifting and hoisting systems
High‑load industrial frames
Bridge and structural components
Engineering parts requiring high strength‑to‑weight efficiency

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