Steel 55 GOST 1577-93 vs Steel 55S2 GOST 14959-79
Property comparison of Steel 55 GOST 1577-93 and Steel 55S2 GOST 14959-79, both carbon steel.
| Property | Steel 55 GOST 1577-93 | Steel 55S2 GOST 14959-79 | Difference |
|---|---|---|---|
| Yield strength | 430 MPa | 1,175 MPa | +173% |
| Tensile strength | 775 MPa | 1,270 MPa | +64% |
| Elongation | 15 % | 6 % | -60% |
| Elastic modulus | 206,000 MPa | 206,000 MPa | 0% |
| Shear modulus | 80,000 MPa | 80,000 MPa | 0% |
| Poisson ratio | 0.29 | 0.3 | +3% |
| Density | 7,860 kg/m³ | 7,860 kg/m³ | 0% |
| Thermal conductivity | 52.9 W/m·K | 51.9 W/m·K | -2% |
| Specific heat | 466 J/kg·K | 466 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 55S2 GOST 14959-79 relative to Steel 55 GOST 1577-93. 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
- Quenched and tempered
- standard
- GOST
- heat treatment
- heat treated
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