A841 Grades A Class 2 - ASTM A841/A841M-2017

Grade	A841 Grades A Class 2
Corresponding Standard	ASTM A841/A841M-2017 Steel Plates for Pressure Vessels, Produced by ThermoMechanical Control Process (TMCP)
Classification	Alloy Steel

A841 Grades A Class 2 Chemical Element Composition Content (%)

	Component	C	Si	Mn ^①	P	S	Cr	Ni	Cu	Mo	V	Nb	Al ^②	More
t≤40mm	Minimum Value	-	0.15	0.7	-	-	-	-	-	-	-	-	0.02	Alt≥0.02或Als≥0.015
t≤40mm	Maximum Value	0.2	0.5	1.35	0.03	0.03	0.25	0.25	0.35	0.08	0.06	0.03	-	Alt≥0.02或Als≥0.015

	Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Nb	Al ^②	More
t＞40mm	Minimum Value	-	0.15	1	-	-	-	-	-	-	-	-	0.02	Alt≥0.02或Als≥0.015
t＞40mm	Maximum Value	0.2	0.5	1.6	0.03	0.03	0.25	0.25	0.35	0.08	0.06	0.03	-	Alt≥0.02或Als≥0.015

A841 Grades A Class 2 Mechanical Properties

	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤65	550~690	≥415	(50mm) ≥22
t＞65	515~655	≥380	≥22

L0-gauge lengh

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