R30008 Cobalt vs. Automotive Grey Cast Iron
R30008 cobalt belongs to the cobalt alloys classification, while automotive grey cast iron belongs to the iron 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 R30008 cobalt and the bottom bar is automotive grey cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 180 |
| Elongation at Break, % | 1.1 to 73 | |
| 9.6 to 14 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 69 to 70 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 140 to 290 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 94 to 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 260 to 280 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1380 to 1390 |
| Melting Onset (Solidus), °C | 1330 | |
| 1340 to 1350 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 490 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 to 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 1.9 to 3.0 |
| Density, g/cm3 | 8.4 | |
| 7.5 to 7.6 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 1.5 to 1.7 |
| Embodied Energy, MJ/kg | 110 | |
| 21 to 24 |
| Embodied Water, L/kg | 400 | |
| 44 to 51 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 25 to 110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 5.2 to 11 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 8.0 to 13 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 4.2 to 8.6 |