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Grade C40
Corresponding Standard ISO 683-1-2016
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
C40 Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
d≤16 or t≤8 650~800 ≥460 ≥16 ≥35
16＜d≤40 or 8＜t≤20 630~780 ≥400 ≥18 ≥40
40＜d≤100 or 20＜t≤60 600~750 ≥350 ≥19 ≥45
1 Approximate Comparison Table
China Japan International Organization for Standardization European Standard
GB JIS ISO EN Numerical Grade
40 S40C C40 C40 1.0511
2 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
3 Approximate Comparison Table
China Japan United States International Organization for Standardization France Russia United Kingdom
GB JIS ASTM/AISI ISO NF EN/NF GOST BS EN/BS
GB/T 699-1999
40 		S40C 1040 ISO 630-1:1987
C40
C40E4
C40M2 		C42
XC42 		40 060A40
C40 Corresponding Standards(Same grade name, different standards)
1 ISO 683-18-1996
C40
2 DIN 17200-1987
C40 1.0511
3 EN 10083-2-2006
C40 1.0511
4 JIS G 7401-2000
(C40) 41CrNiMo2E
5 ISO 4954-1993
(C40) 41CrNiMo2E
6 EN 10250-2-2000
C40 1.0511
7 EN 10277-2-2008
C40 1.0511
8 ISO 683-1-2016
C40
9 DIN EN ISO 683-1-2018
C40
10 ISO 683-18-2014
C40
11 NF EN 10083-2-2006
C40 1.0511

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