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Grade 42CrMo4
Corresponding Standard ISO 683-2-2016
Alloy steels for quenching and tempering
Classification Alloy Steel
42CrMo4 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo
Minimum Value 0.38 0.1 0.6 - - 0.9 - 0.15
Maximum Value 0.45 0.4 0.9 0.025 0.035 1.2 0.4 0.3
42CrMo4 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
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 1100~1300 ≥900 ≥10 ≥40
Bar, flat material, forging; 16<d≤40 or 8<t≤20 Quenching and Tempering 1000~1200 ≥750 ≥11 ≥45 ≥35
Bar, flat material, forging; 40<d≤100 or 20<t≤60 Quenching and Tempering 900~1100 ≥650 ≥12 ≥50 ≥35
Bars, flat products, forgings; 100<d≤160 or 60<t≤100 Quenching and Tempering 800~950 ≥550 ≥13 ≥50 ≥35
Bars, Flats, Forgings; 160<d≤250 or 100<t≤160 Quenching and Tempering 750~900 ≥500 ≥14 ≥55 ≥35
Bars, semi-finished products Processed to improve shearability (+S) ≤255
Bars, flat products, forgings, semi-finished products, rebar Soft Annealing (+A) ≤241
1 Approximate Comparison Table structural alloy steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade SS14 BS EN/BS
42CrMo A30422 SCM440 SCM440
SCM440H 		SCM440 4140
4142 		G41400
G41420 		42CrMo4 42CrMo4 1.7225 42CD4 42CrMo4 1.7225 2244 708M40
2 Approximate Comparison Table structural alloy steel
China Japan South Korea United States International Organization for Standardization Germany Russia United Kingdom
GB ISC JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. GOST BS EN/BS
40CrMnMo A34402 SCM440 SCM440 4142
4140 		G41420 42CrMo4 42CrMo4 1.7225 40ХГМ 708A42
3 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 NF EN/NF EN Numerical Grade GOST SS BS EN/BS
42CrMo SCM440H 4140
4142 		42CrMo4 42CrMo4 42CD4 42CrMo4 1.7225 35KHM
38KHM 		2244 708M40
CFS11
4 Approximate Comparison Table
Japan International Organization for Standardization European Standard
JIS ISO EN Numerical Grade
SCM440
SCM440H 		42CrMo4 42CrMo4 1.7225
42CrMo4 Corresponding Standards(Same grade name, different standards)
1 ISO 683-18-1996
42CrMo4
2 DIN 17200-1987
42CrMo4 1.7225
3 EN 10083-3-2006
42CrMo4 1.7225
4 ISO 683-1-1987
42CrMo4 42CrMo4H 42CrMo4HH 42CrMo4HL
5 EN 10263-4-2001
42CrMo4 1.7225
6 EN 10250-3-1999
42CrMo4 1.7225
7 EN 10269-2006
42CrMo4 1.7225
8 EN 10297-1-2003
42CrMo4 1.7225
9 EN 10305-1-2010
42CrMo4 1.7225
10 DIN 17230-1980
(42CrMo4) 43CrMo4 1.3563 (41CrMo4) (1.7225) (1.7223)
11 DIN EN 10263-4-2002
42CrMo4 1.7225
12 EN 10269-2013
42CrMo4 1.7225
13 DIN 17204-1990
42CrMo4 1.7225
14 NF EN 10269-1999
42CrMo4 1.7225
15 VDI 2230-1-2015
42CrMo 4 1.7225
16 Q/BQB 517-2018
42CrMo4
17 DIN EN 10263-4-2018
42CrMo4 1.7225
18 EN 10263-4-2017
42CrMo4 1.7225
19 DIN EN 10269-2014
42CrMo4 1.7225
20 ISO 683-2-2016
42CrMo4
21 ISO 683-18-2014
42CrMo4
22 EN ISO 683-2-2018
42CrMo4
23 ISO 4954-2018
42CrMo4
24 EN 10132-2021
42CrMo4 1.7225
25 NF A 35-590-1992
42CrMo4 (Y42CD4)
26 NF EN 10083-3-2006
42CrMo4 1.7225 (42CD4)
27 ISO 4954-1-2024
42CrMo4
28 DIN 1654-4-1989
42CrMo4 1.7225

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