42CrMoS4 42CrMoS4H 42CrMoS4HH - ISO 683-1-1987

Grade	42CrMoS4
Other Names
Corresponding Standard	ISO 683-1-1987 Heat-Treatable Steels,alloy Steels and Free-Cutting Steels. Part 1:Direct-Hardening Unalloyed and Low-Alloyed Wrought Steel in Form of Different Black Produts
Classification	Alloy Steel

42CrMoS4 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Mo
Minimum Value	0.38	0.1	0.6	-	0.02	0.9	0.15
Maximum Value	0.45	0.4	0.9	0.035	0.04	1.2	0.3

• The designations are in accordance with the system proposed by ISO/TC 17/SC 2.
• Elements not quoted should 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 should be taken to prevent the addition, from scrap or other material used in manufacture, of such elements which affect the hardenability, mechanical properties and applicability.
• In the case of the grades with specified hardenability requirements (see tables 5 to 7), except for phosphorous and sulfur, insignificant deviations from the limits for cast analysis are permissible; these deviations shall, however, not exceed in the case of carbon ± 0,01 % (m/m) and in all other cases the values according to table 4.
• For boron-treated steels, see ISO 4954.
• Steels with improved machinability by either lead additions or higher sulfur levels up to about 0,100 % (m/m) S (including controlled sulfide morphology) may be available on request.

42CrMoS4 Mechanical Properties

thickness d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
d≤16	Qenching + tempering	1100~1300	≥900	≥10	KU ≥20
16＜d≤4	Qenching + tempering	1000~1200	≥750	≥11	KU ≥25
40＜d≤100	Qenching + tempering	900~1100	≥650	≥12	KU ≥25
100＜d≤160	Qenching + tempering	800~950	≥550	≥13	KU ≥25
160＜d≤250	Qenching + tempering	750~900	≥500	≥14	KU ≥25

1 Approximate Comparison Table 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
4140	42CrMoS4	42CrMoS4	42CD4u	42CrMoS4	1.7227

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
42CrMoS4	42CrMoS4	1.7227

42CrMoS4 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	42CrMoS4
2	DIN 17200-1987
	42CrMoS4 1.7227
3	EN 10083-3-2006
	42CrMoS4 1.7227
4	ISO 683-1-1987
	42CrMoS4 42CrMoS4H 42CrMoS4HH 42CrMoS4HL
5	EN 10263-4-2001
	42CrMoS4 1.7227
6	DIN EN 10263-4-2018
	42CrMoS 4 1.7227
7	EN 10263-4-2017
	42CrMoS 4 1.7227
8	ISO 683-2-2016
	42CrMoS4
9	ISO 683-18-2014
	42CrMoS4
10	EN ISO 683-2-2018
	42CrMoS4
11	ISO 4954-2018
	42CrMoS4
12	NF EN 10083-3-2006
	42CrMoS4 1.7227 (42CD4U)
13	ISO 4954-1-2024
	42CrMoS4
14	JIS G 7105-2000
	42CrMoS4

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