Automotive Malleable Cast Iron vs. R30035 Cobalt
Automotive malleable cast iron belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 220 to 230 |
| Elongation at Break, % | 1.0 to 10 | |
| 9.0 to 46 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 70 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 350 to 720 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 220 to 590 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 320 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1440 |
| Melting Onset (Solidus), °C | 1370 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 440 |
| Thermal Conductivity, W/m-K | 41 | |
| 11 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 1.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 100 |
| Density, g/cm3 | 7.6 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 10 |
| Embodied Energy, MJ/kg | 20 | |
| 140 |
| Embodied Water, L/kg | 45 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 6.8 to 30 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 950 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 13 to 26 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 14 to 24 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 11 | |
| 3.0 |
| Thermal Shock Resistance, points | 9.9 to 21 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 2.2 to 2.9 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Iron (Fe), % | 93.6 to 96.7 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0.15 to 1.3 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 0 | |
| 33 to 37 |
| Phosphorus (P), % | 0.020 to 0.15 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.9 to 1.9 | |
| 0 to 0.15 |
| Sulfur (S), % | 0.020 to 0.2 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |