A541 Grade 22 Class 4 - ASTM A 541/A541M-2005(2020)

Grade	A541 Grade 22 Class 4
Corresponding Standard	ASTM A541/A541M-2005(2020) Standard Specification for Quenched and Tempered Carbon and Alloy Steel Forgings for Pressure Vessel Components
Classification	Alloy Steel

A541 Grade 22 Class 4 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni	Mo	V
Minimum Value	0.05	-	0.3	-	-	2	-	0.9	-
Maximum Value	0.15	0.5	0.6	0.025	0.025	2.5	0.5	1.1	0.05

① When vacuum carbon-deoxidation is required for the classes included in Supplementary Requirement S10, the silicon content shall be 0.10 % max.

A541 Grade 22 Class 4 Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
725~895	≥585	≥16	≥45	4 °C：≥47

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