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Steel SAE 4340 vs Steel SAE 4620
Property comparison of Steel SAE 4340 and Steel SAE 4620, both carbon steel.
| Property | Steel SAE 4340 | Steel SAE 4620 | Difference |
|---|---|---|---|
| Yield strength | 862 MPa | 366 MPa | -58% |
| Tensile strength | 1,279 MPa | 574 MPa | -55% |
| Elongation | 12.2 % | 29 % | +138% |
| Elastic modulus | 207,000 MPa | 207,000 MPa | 0% |
| Shear modulus | 79,000 MPa | 79,000 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,860 kg/m³ | 7,860 kg/m³ | 0% |
| Brinell hardness | 363 HB | 174 HB | -52% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 462 J/kg·K | 457 J/kg·K | -1% |
| 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 SAE 4620 relative to Steel SAE 4340. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
Steel SAE 4340
- standard
- ANSI
- heat treatment
- normalized
Steel SAE 4620
- standard
- ANSI
- heat treatment
- normalized
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