R30012 Cobalt vs. SAE-AISI H23 Steel
R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI H23 steel belongs to the iron alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is R30012 cobalt and the bottom bar is SAE-AISI H23 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 86 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 830 | |
| 760 to 1550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 260 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1680 |
| Melting Onset (Solidus), °C | 1280 | |
| 1630 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 440 |
| Thermal Conductivity, W/m-K | 15 | |
| 20 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 6.9 |
| Embodied Energy, MJ/kg | 120 | |
| 110 |
| Embodied Water, L/kg | 480 | |
| 120 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 22 |
| Strength to Weight: Axial, points | 26 | |
| 24 to 49 |
| Strength to Weight: Bending, points | 22 | |
| 21 to 34 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 5.2 |
| Thermal Shock Resistance, points | 23 | |
| 23 to 47 |
Alloy Composition
| Carbon (C), % | 1.4 to 2.0 | |
| 0.25 to 0.35 |
| Chromium (Cr), % | 27 to 32 | |
| 11 to 12.8 |
| Cobalt (Co), % | 47.5 to 64.1 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 to 3.0 | |
| 71.3 to 76.7 |
| Manganese (Mn), % | 0 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0 to 1.0 | |
| 0 |
| Nickel (Ni), % | 0 to 3.0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 2.0 | |
| 0.15 to 0.6 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tungsten (W), % | 7.5 to 9.5 | |
| 11 to 12.8 |
| Vanadium (V), % | 0 | |
| 0.75 to 1.3 |