R30021 Cobalt vs. 60Cr-40Ni Alloy
R30021 cobalt belongs to the cobalt alloys classification, while 60Cr-40Ni alloy belongs to the otherwise unclassified metals. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is 60Cr-40Ni alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 220 |
| Poisson's Ratio | 0.29 | |
| 0.25 |
| Shear Modulus, GPa | 86 | |
| 87 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 870 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 660 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 370 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 490 |
| Thermal Expansion, µm/m-K | 11 | |
| 16 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 7.4 |
| Embodied Energy, MJ/kg | 110 | |
| 110 |
| Embodied Water, L/kg | 520 | |
| 380 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 1000 |
| Stiffness to Weight: Axial, points | 15 | |
| 16 |
| Stiffness to Weight: Bending, points | 24 | |
| 26 |
| Strength to Weight: Axial, points | 23 | |
| 31 |
| Strength to Weight: Bending, points | 21 | |
| 26 |
| Thermal Shock Resistance, points | 21 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.25 |
| Carbon (C), % | 0.2 to 0.35 | |
| 0 to 0.1 |
| Chromium (Cr), % | 26 to 29 | |
| 58 to 62 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 34.5 to 42 |
| Nitrogen (N), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0 to 0.5 |