Steel 18Ch3MV GOST 20072-74 vs Steel 18ChG GOST 4543-71
Property comparison of Steel 18Ch3MV GOST 20072-74 and Steel 18ChG GOST 4543-71, both carbon steel.
| Property | Steel 18Ch3MV GOST 20072-74 | Steel 18ChG GOST 4543-71 | Difference |
|---|---|---|---|
| Yield strength | 440 MPa | 735 MPa | +67% |
| Tensile strength | 640 MPa | 800 MPa | +25% |
| Elongation | 18 % | 10 % | -44% |
| Elastic modulus | 200,000 MPa | 213,000 MPa | +7% |
| Shear modulus | 77,000 MPa | 82,000 MPa | +6% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,820 kg/m³ | 0% |
| Brinell hardness | 270 HB | 187 HB | -31% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 457 J/kg·K | 457 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 18ChG GOST 4543-71 relative to Steel 18Ch3MV GOST 20072-74. 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
- —
- standard
- GOST
- heat treatment
- Quenching and cooling in the oil
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