25CrMo4 1.7218 - DIN 1654-4-1989

25CrMo4 Chemical Element Composition Content (%)

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

25CrMo4 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
Steel	Spheroidizing Annealing (GKZ) or Spheroidizing Annealing + Peeling (GKZ+SH)	≤580			≥60
Steel	Cold drawing + Spheroidizing Annealing (K+GKZ)	≤560			≥62
Steel	Cold drawing + Spheroidizing annealing + Skinning (K+GKZ+K)	≤580			≥62
d≤16	Quenching and Tempering	900~1100	≥700	≥12	≥50	KU: ≥34 KV: ≥45
16＜d≤40	Quenching and Tempering	800~950	≥600	≥14	≥55	KU: ≥39 KV: ≥50
40＜d≤100	Quenching and Tempering	700~850	≥450	≥15	≥60	KU: ≥39 KV: ≥50

1 Approximate Comparison Table structural alloy steel

2 Approximate Comparison Table

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	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

4 Approximate Comparison Table cast steel

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

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