A541 Grade 3 Class 1 - ASTM A 541/A541M-2005(2020)

Grade	A541 Grade 3 Class 1
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 3 Class 1 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni	Mo	V
Minimum Value	-	-	1.2	-	-	-	0.4	0.45	-
Maximum Value	0.25	0.35	1.5	0.025	0.025	0.25	1	0.6	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 3 Class 1 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
550~725	≥345	≥18	≥38	4 °C：≥41

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