C40 - DIN EN ISO 683-1-2018

Grade	C40
Corresponding Standard	DIN EN ISO 683-1-2018 Heat-treatable steels,alloy steels and free-cutting steels--Part 1: Non-alloy steels for quenching and tempering
Classification	Carbon Steel

C40 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.37	0.1	0.5	-	-	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.44	0.4	0.8	0.045	0.045	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

C40 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
d≤16; t≤8	Quenching and Tempering	650~800	≥460	≥16	≥35
16＜d≤40；8＜t≤20	Quenching and Tempering	630~780	≥400	≥18	≥40
40＜d≤100；20＜t≤60	Quenching and Tempering	600~750	≥350	≥19	≥45
d≤16；t≤16	Normalizing (N)	≥580	≥320	≥16
16<d≤100；16＜t≤100	Normalizing (N)	≥550	≥290	≥17
100<d≤250；100＜t≤250	Normalizing (N)	≥530	≥260	≥17

New and Old Grade Replacement List

Approximate Comparison Table

China	Japan	United States	International Organization for Standardization	Germany		France	European Standard		Russia	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
40	S40C	1038 1040	C40 C40E4	C40 Ck40	1.0511	AF60C40 AF60C45 XC42HI	C40	1.0511	40	070M40 080M40 En8

C40 Corresponding Standards(Same grade name, different standards)

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