Grade 366 Molybdenum vs. R30605 Cobalt
Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while R30605 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 366 molybdenum and the bottom bar is R30605 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 300 | |
| 210 |
| Elongation at Break, % | 2.2 | |
| 34 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 120 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 580 | |
| 1130 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 470 to 1600 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 290 |
| Specific Heat Capacity, J/kg-K | 210 | |
| 410 |
| Thermal Expansion, µm/m-K | 7.6 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 12 | |
| 9.6 |
| Embodied Carbon, kg CO2/kg material | 27 | |
| 9.8 |
| Embodied Energy, MJ/kg | 340 | |
| 140 |
| Embodied Water, L/kg | 300 | |
| 450 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 18 | |
| 21 |
| Strength to Weight: Axial, points | 13 | |
| 33 to 55 |
| Strength to Weight: Bending, points | 13 | |
| 25 to 36 |
| Thermal Shock Resistance, points | 18 | |
| 31 to 52 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 46.4 to 57 |
| Iron (Fe), % | 0 to 0.010 | |
| 0 to 3.0 |
| Manganese (Mn), % | 0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 66.9 to 73 | |
| 0 |
| Nickel (Ni), % | 0 to 0.0020 | |
| 9.0 to 11 |
| Nitrogen (N), % | 0 to 0.0020 | |
| 0 |
| Oxygen (O), % | 0 to 0.0025 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.010 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tungsten (W), % | 27 to 33 | |
| 14 to 16 |