622 - BS 3604-2-1991

Grade	622
Corresponding Standard	BS 3604-2-1991 Steel Pipes and Tubes for Pressure Purposes: Ferritic Alloy Steel with Specified Elevated Temperature Properties — Part 2: Specification for Longitudinally Arc Welded Tubes
Classification	Alloy Steel

622 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Al
Minimum Value	0.09	-	0.3	-	-	2	-	-	0.9	-
Maximum Value	0.15	0.5	0.6	0.025	0.015	2.5	0.3	0.3	1.1	0.02

622 Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
515~690	≥340	≥18

Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
12CrMo	SCMV4	A387Gr.22 Gr.P22	F34 P34 TS34	10CrMo9-10	10CD9-10 12CD9-10	10CrMo9-10	1.7380	10KH2M	2218	622 622Gr.31

622 Corresponding Standards(Same grade name, different standards)

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