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

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

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

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

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