ASTM B631 Class A vs. ASTM A732 Cast Steel
ASTM B631 class A belongs to the otherwise unclassified metals classification, while ASTM A732 cast steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is ASTM B631 class A and the bottom bar is ASTM A732 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 85 to 86 | |
| 72 to 73 |
Thermal Properties
| Latent Heat of Fusion, J/g | 160 | |
| 250 to 260 |
| Melting Completion (Liquidus), °C | 2680 to 2690 | |
| 1440 to 1460 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 470 to 480 |
| Thermal Conductivity, W/m-K | 420 | |
| 39 to 50 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 40 to 47 | |
| 7.1 to 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 25 to 29 | |
| 8.2 to 8.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 15 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 43 | |
| 1.4 to 1.7 |
| Embodied Energy, MJ/kg | 670 | |
| 19 to 24 |
Common Calculations
| Stiffness to Weight: Axial, points | 8.5 | |
| 13 |
| Stiffness to Weight: Bending, points | 14 | |
| 24 |
| Thermal Diffusivity, mm2/s | 180 | |
| 10 to 14 |