Automotive Grey Cast Iron vs. R30008 Cobalt
Automotive grey cast iron belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is automotive grey cast iron and the bottom bar is R30008 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 210 |
| Elongation at Break, % | 9.6 to 14 | |
| 1.1 to 73 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 to 70 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 950 to 1700 |
| Tensile Strength: Yield (Proof), MPa | 94 to 200 | |
| 500 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1380 to 1390 | |
| 1400 |
| Melting Onset (Solidus), °C | 1340 to 1350 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 95 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 8.1 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 110 |
| Embodied Water, L/kg | 44 to 51 | |
| 400 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 25 to 110 | |
| 590 to 2720 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 31 to 56 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 25 to 37 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 25 to 44 |