37Cr4 - EN ISO 683-2-2018

Grade	37Cr4
Corresponding Standard	EN ISO 683-2-2018 Heat-treatable steels,alloy steels and free-cutting steels--Part 2：Alloy steels for quenching and tempering
Classification	Alloy Steel

37Cr4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu
Minimum Value	0.34	0.1	0.6	-	-	0.9	-
Maximum Value	0.41	0.4	0.9	0.025	0.035	1.2	0.4

37Cr4 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
Bar, flat material, forging; d≤16 or t≤8	Quenching and Tempering (+QT)	950~1150	≥750	≥11	≥35	-	-
Bar, flat material, forging; 16<d≤40 or 8<t≤20	Quenching and Tempering (+QT)	850~1000	≥630	≥13	≥40	-	≥35
Bar, flat material, forging; 40<d≤100 or 20<t≤60	Quenching and Tempering (+QT)	750~900	≥510	≥14	≥40	-	≥35
Bars, semi-finished products	Processed to improve shearability (+S)	-	-	-	-	≤255	-
Bars, flat products, forgings, semi-finished products, rebar	Soft Annealing (+A)	-	-	-	-	≤235	-

1 Approximate Comparison Table

China	International Organization for Standardization	European Standard
GB	ISO	EN	Numerical Grade
35Cr	37Cr4	37Cr4	1.7034

2 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	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
35Cr	SCr435H	Gr.5135	37Cr4	37Cr4	1.7034	37Cr4 38C4	37Cr4	1.7034	38KHA 40KH	2245	530A36 530M36

3 Approximate Comparison Table

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
37Cr4	37Cr4	1.7034

37Cr4 Corresponding Standards(Same grade name, different standards)

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