C40R - ISO 683-1-2016

Grade	C40R
Corresponding Standard	ISO 683-1-2016 Non-alloy steels for quenching and tempering
Classification	Carbon Steel

C40R Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.37	0.1	0.5	-	0.02	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.44	0.4	0.8	0.025	0.04	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

C40R Mechanical Properties

	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
d≤16 or t≤8	650~800	≥460	≥16	≥35	≥20
16＜d≤40 or 8＜t≤20	630~780	≥400	≥18	≥40	≥20
40＜d≤100 or 20＜t≤60	600~750	≥350	≥19	≥45	≥20

Approximate Comparison Table Non-Alloy Steel for Quenching and Tempering

United States	International Organization for Standardization	Germany	France	European Standard
ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade
1040	C40R C40M2	Cm40	XC42H1u	C40R	1.1189

C40R Corresponding Standards(Same grade name, different standards)

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