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

Posted:2026-05-09 08:49:49

ASTM A514 Grade Q is a high‑strength quenched and tempered alloy steel plate designed for structural components requiring superior strength‑to‑weight performance, excellent toughness, and reliable behavior under heavy or dynamic loading.
With a minimum yield strength of 690 MPa, A514 Gr.Q provides outstanding mechanical efficiency and dimensional stability, making it ideal for lifting equipment, bridge structures, heavy machinery frames, and precision‑fabricated assemblies.
The grade offers consistent weldability and forming properties, ensuring dependable performance in demanding engineering environments.
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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