R30605 Cobalt vs. Automotive Malleable Cast Iron
R30605 cobalt belongs to the cobalt alloys classification, while automotive malleable cast iron belongs to the iron alloys. There are 24 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 R30605 cobalt and the bottom bar is automotive malleable cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 180 |
| Elongation at Break, % | 34 | |
| 1.0 to 10 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 350 to 720 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 220 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 260 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1410 |
| Melting Onset (Solidus), °C | 1330 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 480 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 41 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 1.5 |
| Embodied Energy, MJ/kg | 140 | |
| 20 |
| Embodied Water, L/kg | 450 | |
| 45 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 25 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 13 to 26 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 14 to 24 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 11 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 9.9 to 21 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 2.2 to 2.9 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 46.4 to 57 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 93.6 to 96.7 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.15 to 1.3 |
| Nickel (Ni), % | 9.0 to 11 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0.020 to 0.15 |
| Silicon (Si), % | 0 to 0.4 | |
| 0.9 to 1.9 |
| Sulfur (S), % | 0 to 0.030 | |
| 0.020 to 0.2 |
| Tungsten (W), % | 14 to 16 | |
| 0 |