25CrMo4 - ISO 683-2-2016

Grade	25CrMo4
Corresponding Standard	ISO 683-2-2016 Alloy Steels for Quenching and Tempering
Classification	Alloy Steel

25CrMo4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo
Minimum Value	0.22	0.1	0.6	-	-	0.9	-	0.15
Maximum Value	0.29	0.4	0.9	0.025	0.035	1.2	0.4	0.3

25CrMo4 Mechanical Properties

diameter/thickness d/t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s 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	quenched and tempered (+QT)	900~1100	≥700	≥12	≥50
Bar, flat material, forging; 16<d≤40 or 8<t≤20	quenched and tempered (+QT)	800~950	≥600	≥14	≥55		≥50
Bar, flat material, forging; 40<d≤100 or 20<t≤60	quenched and tempered (+QT)	700~850	≥450	≥15	≥60		≥50
Bars, flat products, forgings; 100<d≤160 or 60<t≤100	quenched and tempered (+QT)	650~800	≥400	≥16	≥60		≥45
Bars, semi-finished products	Processed to improve shearability (+S)					≤255
Bars, flat products, forgings, semi-finished products, rebar	Soft Annealing (+A)					≤212

1 Approximate Comparison Table Alloy Steel for Quenching and Tempering

China		Japan	International Organization for Standardization	European Standard
GB	ISC	JIS	ISO	EN	Numerical Grade
30CrMo	A30302	SCM425 SCM425H	25CrMo4	25CrMo4	1.7218

2 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	SAE	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
30CrMo	SCM420 SCM430	4130	25CrMo4	25CrMo4	25CD4	25CrMo4	1.7218	20KHM 30KHM 30KHMA	2225	708A25 708M25 CFS10

3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

Japan	International Organization for Standardization	European Standard
JIS	ISO	EN	Numerical Grade
SCM425 SCM425H	25CrMo4	25CrMo4	1.7218

4 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	Japan	International Organization for Standardization	European Standard
GB	JIS	ISO	EN
ML25CrMo	SCM425	25CrMo4	25CrMo4

25CrMo4 Corresponding Standards(Same grade name, different standards)

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