AISI 8740 Low-Alloy Steel Bars and Forgings vs SAE 8740 Carbon Steel (Oil quenched from 830 °C (1525 °F) and tempered at 540 °C (1)
Property comparison of AISI 8740 Low-Alloy Steel Bars and Forgings and SAE 8740 Carbon Steel (Oil quenched from 830 °C (1525 °F) and tempered at 540 °C (1), both carbon steel.
| Property | AISI 8740 Low-Alloy Steel Bars and Forgings | SAE 8740 Carbon Steel (Oil quenched from 830 °C (1525 °F) and tempered at 540 °C (1) | Difference |
|---|---|---|---|
| Tensile strength | 861.8 MPa | 1,225 MPa | +42% |
| Elastic modulus | 199,948 MPa | 200,000 MPa | 0% |
| Shear modulus | 75,842 MPa | 76,923 MPa | +1% |
| Poisson ratio | 0.32 | 0.3 | -6% |
| Density | 7,833 kg/m³ | 7,850 kg/m³ | 0% |
| Specific heat | 462 J/kg·K | 462 J/kg·K | 0% |
Difference is SAE 8740 Carbon Steel (Oil quenched from 830 °C (1525 °F) and tempered at 540 °C (1) relative to AISI 8740 Low-Alloy Steel Bars and Forgings. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- AISI 8740
- standard
- MIL-HDBK-5J
- heat treatment
- Quenched and tempered
- grade
- 8740
- standard
- SAE
- heat treatment
- Oil quenched from 830 °C (1525 °F) and tempered at 540 °C (1000 °F)
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