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Steel SAE 4130 vs Steel SAE 4140
Property comparison of Steel SAE 4130 and Steel SAE 4140, both carbon steel.
| Property | Steel SAE 4130 | Steel SAE 4140 | Difference |
|---|---|---|---|
| Yield strength | 1,462 MPa | 1,641 MPa | +12% |
| Tensile strength | 1,627 MPa | 1,772 MPa | +9% |
| Elongation | 10 % | 8 % | -20% |
| 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 | 467 HB | 510 HB | +9% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 460 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 SAE 4140 relative to Steel SAE 4130. 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 4130
- standard
- ANSI
- heat treatment
- tempered at 400 F
Steel SAE 4140
- standard
- ANSI
- heat treatment
- tempered at 400 F
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