R30605 Cobalt vs. Chromium 33
R30605 cobalt belongs to the cobalt alloys classification, while chromium 33 belongs to the otherwise unclassified metals. They have a modest 33% 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 (10, in this case) are not shown.
For each property being compared, the top bar is R30605 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, % | 34 | |
| 45 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 81 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 430 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 480 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 6.0 |
| Embodied Energy, MJ/kg | 140 | |
| 84 |
| Embodied Water, L/kg | 450 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 14 |
| Stiffness to Weight: Bending, points | 21 | |
| 25 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 30 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 25 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0 to 0.015 |
| Chromium (Cr), % | 19 to 21 | |
| 31 to 35 |
| Cobalt (Co), % | 46.4 to 57 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.3 to 1.2 |
| Iron (Fe), % | 0 to 3.0 | |
| 25.7 to 37.9 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0.5 to 2.0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 30 to 33 |
| Nitrogen (N), % | 0 | |
| 0.35 to 0.6 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Tungsten (W), % | 14 to 16 | |
| 0 |