A372 Grade H Class 70 - ASTM A372/A372M-2020(R2025)

Grade	A372 Grade H Class 70
Corresponding Standard	ASTM A372/A372M-2020(R2025) Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels
Classification	Alloy Steel

A372 Grade H Class 70 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.3	0.15	0.75	-	-	0.4	0.15
Maximum Value	0.4	0.35	1.05	0.015	0.01	0.65	0.25

A372 Grade H Class 70 Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Hardness HBW
825~1000	≥485	≥18	≥248

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