A387 Grade9 Class1 K90941 - ASTM A387/A387M-2025

Grade	A387 Grade9 Class1
USA UNS	K90941
Corresponding Standard	ASTM A387/A387M-2025 Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
Classification	Alloy Steel

A387 Grade9 Class1 Chemical Element Composition Content (%)

	Component	C	Si	Mn	P	S	Cr	Mo	V
熔炼分析	Minimum Value	-	-	0.3	-	-	8	0.9	-
熔炼分析	Maximum Value	0.15	1	0.6	0.025	0.025	10	1.1	0.04

	Component	C	Si	Mn	P	S	Cr	Mo	V
成品分析	Minimum Value	-	-	0.25	-	-	7.9	0.85	-
成品分析	Maximum Value	0.15	1.05	0.66	0.025	0.025	10.1	1.15	0.05

A387 Grade9 Class1 Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
415~585	≥205	≥18	≥45

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