25CD 4 - NF A 35-557-1983

25CD 4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.23	0.1	0.6	-	-	0.9	0.15
Maximum Value	0.29	0.4	0.9	0.035	0.035	1.2	0.25

25CD 4 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Bars, coils; d=18	Oil Quenching	-	-	-	HRC38	-
Bar, Coil; d=10	Oil Quenching	-	-	-	HRC42	-
Bar, Coil; d≤10	Quenching and Tempering	980~1180	≥800	≥10	-	≥50
Bar, Coil; 10<d≤18	Quenching and Tempering	960~1110	≥780	≥12	-	≥50

1 Approximate Comparison Table structural alloy steel

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

25CD4 Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!