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Grade C40E
European Standard Steel Grade 1.1186
Corresponding Standard EN 10132-2021
Cold rolled narrow steel strip for heat treatment - Technical delivery conditions
Classification Carbon Steel
C40E Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo More
Minimum Value 0.37 - 0.5 - - - - - - Cr+Mo+Ni≤0.63
Maximum Value 0.44 0.4 0.8 0.025 0.035 0.4 0.4 0.3 0.1
① Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition, from scrap or other material used in manufacture, of such elements which affect the hardenability, mechanical properties and application.
C40E Mechanical Properties
Delivery condition* Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
annealed (+A) or annealed and skin passed(+LC) ≤550 ≤440 ≥18 HV
≤170
cold rolled(+CR)** ≤970 HV
≤280
quenched and tempered(+QT)*** 800~1300 HV
250~400
• The elongation values in the table are for a gauge length of 80 mm.
• +A=annealed，+LC=annealed and skin passed，+CR=cold rolled，+QT=quenched and tempered
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
40 U20402 S40C S40C SM40C 1040 G10400 C40E4 C40E
Ck40 		1.1186 C40E
XC42 		40 C40E
080M40
2 Approximate Comparison Table
China Japan International Organization for Standardization European Standard
GB JIS ISO EN Numerical Grade
40 S40C C40E C40E 1.1186
3 Approximate Comparison Table
Japan United States International Organization for Standardization Germany France European Standard Russia United Kingdom
JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
S40C 1040 C40E4 Ck40 XC42H1 C40E 1.1186 40 080M40
CS40
4 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM/AISI ISO EN Numerical Grade
40Mn
(GB/T 699-2015) 		U21402 SWRH42B
(JIS G3506:2004) 		1043
(ASTM A29/A29M:2005) 		C40E4
(ISO 683-18:1996) 		C40E
(EN 10083-1:1991+A1:1996)
(EN 10084:1998) 		1.1186
C40E Corresponding Standards(Same grade name, different standards)
1 EN 10083-2-2006
C40E 1.1186
2 ISO 683-1-2016
C40E
3 DIN EN ISO 683-1-2018
C40E
4 ISO 683-18-2014
C40E
5 EN 10132-2021
C40E 1.1186
6 NF EN 10083-2-2006
C40E 1.1186 (XC4H1)

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