Steel 30ChM GOST 4543-71 vs Steel 30ChMA GOST 4543-71
Property comparison of Steel 30ChM GOST 4543-71 and Steel 30ChMA GOST 4543-71, both carbon steel.
| Property | Steel 30ChM GOST 4543-71 | Steel 30ChMA GOST 4543-71 | Difference |
|---|---|---|---|
| Yield strength | 750 MPa | 735 MPa | -2% |
| Tensile strength | 950 MPa | 930 MPa | -2% |
| Elastic modulus | 208,000 MPa | 208,000 MPa | 0% |
| Shear modulus | 80,000 MPa | 80,000 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,820 kg/m³ | 7,820 kg/m³ | 0% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000012 1/K | 0% |
| Melting point | 1,480 °C | 1,480 °C | 0% |
Difference is Steel 30ChMA GOST 4543-71 relative to Steel 30ChM GOST 4543-71. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- GOST
- heat treatment
- Quenching and cooling in the oil
- standard
- GOST
- heat treatment
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