ASTM A732 Cast Steel vs. R30021 Cobalt
ASTM A732 cast steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 4.0 to 25 | |
| 9.0 |
| Fatigue Strength, MPa | 230 to 750 | |
| 250 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 to 73 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 1470 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 310 to 1340 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 to 260 | |
| 330 |
| Melting Completion (Liquidus), °C | 1440 to 1460 | |
| 1350 |
| Melting Onset (Solidus), °C | 1400 to 1420 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 470 to 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 39 to 50 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 to 7.7 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.9 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 to 7.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.4 to 1.7 | |
| 8.0 |
| Embodied Energy, MJ/kg | 19 to 24 | |
| 110 |
| Embodied Water, L/kg | 47 to 54 | |
| 520 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 45 to 130 | |
| 57 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 4770 | |
| 570 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 52 | |
| 23 |
| Strength to Weight: Bending, points | 17 to 37 | |
| 21 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 3.8 |
| Thermal Shock Resistance, points | 14 to 43 | |
| 21 |