R30035 Cobalt vs. Ductile Cast Iron
R30035 cobalt belongs to the cobalt alloys classification, while ductile cast iron belongs to the iron alloys. There are 27 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 R30035 cobalt and the bottom bar is ductile cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 170 to 180 |
| Elongation at Break, % | 9.0 to 46 | |
| 2.1 to 20 |
| Poisson's Ratio | 0.29 | |
| 0.28 to 0.31 |
| Shear Modulus, GPa | 84 to 89 | |
| 64 to 70 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 460 to 920 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 310 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1160 |
| Melting Onset (Solidus), °C | 1320 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 490 |
| Thermal Conductivity, W/m-K | 11 | |
| 31 to 36 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.8 to 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 1.9 |
| Density, g/cm3 | 8.7 | |
| 7.1 to 7.5 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 1.5 |
| Embodied Energy, MJ/kg | 140 | |
| 21 |
| Embodied Water, L/kg | 410 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 17 to 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 280 to 1330 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 12 to 14 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 24 to 26 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 17 to 35 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 18 to 29 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 8.9 to 10 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 17 to 35 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 3.0 to 3.5 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 93.7 to 95.5 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.080 |
| Silicon (Si), % | 0 to 0.15 | |
| 1.5 to 2.8 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |