Austenitic Grey Cast Iron vs. R30021 Cobalt
Austenitic grey cast iron belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is austenitic grey cast iron and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 220 |
| Poisson's Ratio | 0.29 to 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 69 to 72 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 150 to 230 | |
| 700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 to 350 | |
| 330 |
| Melting Completion (Liquidus), °C | 1340 to 1400 | |
| 1350 |
| Melting Onset (Solidus), °C | 1290 to 1350 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 470 to 490 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 to 14 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 to 8.1 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.1 to 4.7 | |
| 8.0 |
| Embodied Energy, MJ/kg | 43 to 65 | |
| 110 |
| Embodied Water, L/kg | 93 to 120 | |
| 520 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 23 to 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.3 to 8.2 | |
| 23 |
| Strength to Weight: Bending, points | 7.9 to 11 | |
| 21 |
| Thermal Shock Resistance, points | 4.5 to 6.5 | |
| 21 |