Grade 366 Molybdenum vs. Class 4 Tungsten
Both grade 366 molybdenum and class 4 tungsten are otherwise unclassified metals. They have a modest 30% 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 (5, in this case) are not shown.
For each property being compared, the top bar is grade 366 molybdenum and the bottom bar is class 4 tungsten.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 300 | |
| 270 |
| Elongation at Break, % | 2.2 | |
| 2.3 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 120 | |
| 110 |
| Tensile Strength: Ultimate (UTS), MPa | 580 | |
| 790 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 170 |
| Specific Heat Capacity, J/kg-K | 210 | |
| 130 |
| Thermal Expansion, µm/m-K | 7.6 | |
| 4.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 12 | |
| 16 |
| Embodied Carbon, kg CO2/kg material | 27 | |
| 24 |
| Embodied Energy, MJ/kg | 340 | |
| 360 |
| Embodied Water, L/kg | 300 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 12 | |
| 16 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 620 |
| Stiffness to Weight: Axial, points | 14 | |
| 9.6 |
| Stiffness to Weight: Bending, points | 18 | |
| 14 |
| Strength to Weight: Axial, points | 13 | |
| 14 |
| Strength to Weight: Bending, points | 13 | |
| 12 |
| Thermal Shock Resistance, points | 18 | |
| 46 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 |
| Iron (Fe), % | 0 to 0.010 | |
| 0 |
| Molybdenum (Mo), % | 66.9 to 73 | |
| 0 |
| Nickel (Ni), % | 0 to 0.0020 | |
| 0 |
| Nitrogen (N), % | 0 to 0.0020 | |
| 0 |
| Oxygen (O), % | 0 to 0.0025 | |
| 0 |
| Silicon (Si), % | 0 to 0.010 | |
| 0 |
| Tungsten (W), % | 27 to 33 | |
| 97 |
| Residuals, % | 0 | |
| 3.0 |