30CrMo Steel

30CrMo steel is a Chinese alloy steel for engineering and machine structural use, has high strength and high toughness, and has good high temperature strength at temperatures below 500 °C. 30CrMo material also has good machinability, medium cold bending and plasticity, high hardenability, good weldability, and is generally used in the adjusted state.

Use of 30CrMo Alloy Steel

30CrMo alloy steel can be used to manufacture steel pipes with working temperature below 400 °C, fasteners with operating temperature below 450 °C in boilers and steam turbines, nuts and flanges with working temperature below 500 °C and high pressure, and load in general machinery; Shafts, gears, bolts, studs, manipulators, high-pressure conduits and weldments in chemical equipment below 250 °C, nitrogen-hydrogen up to medium working.

Datasheet and Specification

30CrMo Steel Chemical Composition

	Chemical Composition (%)
Steel Grade	C	Si	Mn	P	S	Cr	Mo	Cu
30CrMo	0.26 to 0.33	0.17 to 0.37	0.40 to 0.70	≤ 0.030	≤ 0.030	0.80 to 1.10	0.15 to 0.25	≤ 0.30

Mechanical Properties of 30CrMo Steel

Yield strength: ≥ 785 MPa
Tensile strength: ≥ 980 MPa
Elongation: ≥ 10%
Rate of reduction in area: ≥50%
Impact absorbing energy: ≥ 63 J
Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
Sample size: 25mm

Heat Treatment Specification of 30CrMo Material

First quenching heating temperature: 850 °C (Cooling: oil)
Tempering heating temperature: 500 °C (Cooling: water, oil)

Equivalent

30CrMo steel equivalent to US ASTM, European Union (Germany DIN EN, British BS EN, France NF EN…), Japanese JIS, and ISO standard. (For reference)

30CrMo material equivalent
China	USA	European Union	Japan	ISO
Standard	Grade	Standard	Grade	Standard	Grade (Steel number)	Standard	Grade	Standard	Grade
GB/T 3077	30CrMo	AISI, SAE ASTM A29/A29M	AISI SAE 4130 Steel	DIN EN 10083-3	25CrMo4 (1.7218), 34CrMo4 (1.7220)	JIS G 4053	SCM430	ISO 683-1	25CrMo4