Steel 38ChA GOST 1577-93 vs Steel 38ChS GOST 4543-71
Property comparison of Steel 38ChA GOST 1577-93 and Steel 38ChS GOST 4543-71, both carbon steel.
| Property | Steel 38ChA GOST 1577-93 | Steel 38ChS GOST 4543-71 | Difference |
|---|---|---|---|
| Yield strength | 630 MPa | 750 MPa | +19% |
| Tensile strength | 925 MPa | 950 MPa | +3% |
| Elastic modulus | 206,000 MPa | 211,000 MPa | +2% |
| Shear modulus | 80,000 MPa | 82,000 MPa | +3% |
| Poisson ratio | 0.29 | 0.29 | 0% |
| Density | 7,860 kg/m³ | 7,640 kg/m³ | -3% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 462 J/kg·K | 462 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 38ChS GOST 4543-71 relative to Steel 38ChA 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
- Improved
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