25CrMoS4 25CrMoS4H 25CrMoS4HH - ISO 683-1-1987

Grade	25CrMoS4
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

25CrMoS4 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Mo
Minimum Value	0.22	0.1	0.6	-	0.02	0.9	0.15
Maximum Value	0.29	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.

25CrMoS4 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	900~1100	≥700	≥12	KU ≥30
16＜d≤4	Qenching + tempering	800~950	≥600	≥14	KU ≥35
40＜d≤100	Qenching + tempering	700~850	≥450	≥15	KU ≥35
100＜d≤160	Qenching + tempering	650~800	≥400	≥16	KU ≥30

1 Approximate Comparison Table Alloy Steel for Quenching and Tempering

International Organization for Standardization	Germany		France	European Standard
ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade
25CrMoS4	25CrMoS4	1.7213	25CD4u	25CrMoS4	1.7213

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
25CrMoS4	25CrMoS4	1.7213

25CrMoS4 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	25CrMoS4
2	DIN 17200-1987
	25CrMoS4 1.7213
3	EN 10083-3-2006
	25CrMoS4 1.7213
4	ISO 683-1-1987
	25CrMoS4 25CrMoS4H 25CrMoS4HH 25CrMoS4HL
5	EN 10263-4-2001
	25CrMoS4 1.7213
6	DIN EN 10263-4-2018
	25CrMoS4 1.7213
7	EN 10263-4-2017
	25CrMoS4 1.7213
8	ISO 683-2-2016
	25CrMoS4
9	ISO 683-18-2014
	25CrMoS4
10	EN ISO 683-2-2018
	25CrMoS4
11	ISO 4954-2018
	25CrMoS4
12	NF EN 10083-3-2006
	25CrMoS4 1.7213 (25CD4U)
13	ISO 4954-1-2024
	25CrMoS4
14	JIS G 7105-2000
	25CrMoS4

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