Austempered Cast Iron vs. R30003 Cobalt
Austempered cast iron belongs to the iron alloys classification, while R30003 cobalt belongs to the cobalt 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 austempered cast iron and the bottom bar is R30003 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 210 |
| Elongation at Break, % | 1.1 to 13 | |
| 10 to 73 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 62 to 69 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 970 to 1720 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 510 to 1090 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 310 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1400 |
| Melting Onset (Solidus), °C | 1340 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 450 |
| Thermal Conductivity, W/m-K | 42 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 95 |
| Density, g/cm3 | 7.5 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 8.0 |
| Embodied Energy, MJ/kg | 25 | |
| 110 |
| Embodied Water, L/kg | 48 | |
| 400 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 600 to 2790 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 32 to 57 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 26 to 38 |
| Thermal Diffusivity, mm2/s | 11 | |
| 3.3 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 26 to 45 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 0 |
| Arsenic (As), % | 0 to 0.020 | |
| 0 |
| Boron (B), % | 0 | |
| 0 to 0.1 |
| Carbon (C), % | 3.4 to 3.8 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0 to 0.1 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 39 to 41 |
| Copper (Cu), % | 0 to 0.8 | |
| 0 |
| Iron (Fe), % | 89.6 to 94 | |
| 10 to 20.5 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 1.5 to 2.5 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 6.0 to 8.0 |
| Nickel (Ni), % | 0 to 2.0 | |
| 14 to 16 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Selenium (Se), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 2.3 to 2.7 | |
| 0 to 1.2 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.015 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 |
| Vanadium (V), % | 0 to 0.1 | |
| 0 |