Grey Cast Iron vs. G-CoCr28 Cobalt
Grey cast iron belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is grey cast iron and the bottom bar is G-CoCr28 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 210 |
| Elongation at Break, % | 9.6 | |
| 6.7 |
| Fatigue Strength, MPa | 69 to 170 | |
| 130 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 69 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 450 | |
| 560 |
| Tensile Strength: Yield (Proof), MPa | 98 to 290 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1330 |
| Melting Onset (Solidus), °C | 1180 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 46 | |
| 8.5 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 100 |
| Density, g/cm3 | 7.5 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 6.2 |
| Embodied Energy, MJ/kg | 21 | |
| 84 |
| Embodied Water, L/kg | 44 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 37 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 27 to 240 | |
| 160 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.8 to 17 | |
| 19 |
| Strength to Weight: Bending, points | 8.7 to 17 | |
| 19 |
| Thermal Diffusivity, mm2/s | 13 | |
| 2.2 |
| Thermal Shock Resistance, points | 6.0 to 17 | |
| 14 |
Alloy Composition
| Carbon (C), % | 3.1 to 3.4 | |
| 0.050 to 0.25 |
| Chromium (Cr), % | 0 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 48 to 52 |
| Iron (Fe), % | 92.1 to 93.9 | |
| 9.7 to 24.5 |
| Manganese (Mn), % | 0.5 to 0.7 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 4.0 |
| Niobium (Nb), % | 0 | |
| 0 to 0.5 |
| Phosphorus (P), % | 0 to 0.9 | |
| 0 to 0.040 |
| Silicon (Si), % | 2.5 to 2.8 | |
| 0.5 to 1.5 |
| Sulfur (S), % | 0 to 0.15 | |
| 0 to 0.030 |