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 | ||||
