ASTM A913 Grade 65 QST Steel vs ASTM A913 Grade 70 QST Steel
Property comparison of ASTM A913 Grade 65 QST Steel and ASTM A913 Grade 70 QST Steel, both carbon steel.
| Property | ASTM A913 Grade 65 QST Steel | ASTM A913 Grade 70 QST Steel | Difference |
|---|---|---|---|
| Yield strength | 450 MPa | 485 MPa | +8% |
| Tensile strength | 550 MPa | 620 MPa | +13% |
| Elongation | 17 % | 16 % | -6% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Shear modulus | 77,200 MPa | 77,200 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,850 kg/m³ | 0% |
| Thermal conductivity | 66.9 W/m·K | 66.9 W/m·K | 0% |
| Specific heat | 456 J/kg·K | 456 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 ASTM A913 Grade 70 QST Steel relative to ASTM A913 Grade 65 QST Steel. 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
- 65
- standard
- ASTM
- heat treatment
- QST
- grade
- 70
- standard
- ASTM
- heat treatment
- QST
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators