R30008 Cobalt vs. Chromium 33
R30008 cobalt belongs to the cobalt alloys classification, while chromium 33 belongs to the otherwise unclassified metals. They have 53% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is chromium 33.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 1.1 to 73 | |
| 45 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 83 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 430 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 36 |
| Density, g/cm3 | 8.4 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 6.0 |
| Embodied Energy, MJ/kg | 110 | |
| 84 |
| Embodied Water, L/kg | 400 | |
| 250 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 450 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 30 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 25 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 21 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.015 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 31 to 35 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.3 to 1.2 |
| Iron (Fe), % | 7.6 to 20 | |
| 25.7 to 37.9 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0.5 to 2.0 |
| Nickel (Ni), % | 15 to 18 | |
| 30 to 33 |
| Nitrogen (N), % | 0 | |
| 0.35 to 0.6 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |