R30605 Cobalt vs. Austempered Cast Iron
R30605 cobalt belongs to the cobalt alloys classification, while austempered 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 R30605 cobalt and the bottom bar is austempered cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 180 |
| Elongation at Break, % | 34 | |
| 1.1 to 13 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 62 to 69 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 860 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 560 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1380 |
| Melting Onset (Solidus), °C | 1330 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 490 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 42 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 1.8 |
| Embodied Energy, MJ/kg | 140 | |
| 25 |
| Embodied Water, L/kg | 450 | |
| 48 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 25 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 32 to 66 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 27 to 44 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 11 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 25 to 53 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.050 |
| Arsenic (As), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0.050 to 0.15 | |
| 3.4 to 3.8 |
| Chromium (Cr), % | 19 to 21 | |
| 0 to 0.1 |
| Cobalt (Co), % | 46.4 to 57 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.8 |
| Iron (Fe), % | 0 to 3.0 | |
| 89.6 to 94 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.040 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.3 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.3 |
| Nickel (Ni), % | 9.0 to 11 | |
| 0 to 2.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Selenium (Se), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.4 | |
| 2.3 to 2.7 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.020 |
| Tin (Sn), % | 0 | |
| 0 to 0.020 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0 to 0.1 |