Class 1 Tungsten vs. Class 2 Tungsten
Both class 1 tungsten and class 2 tungsten are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is class 1 tungsten and the bottom bar is class 2 tungsten.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 250 | |
| 260 |
| Elongation at Break, % | 5.7 | |
| 5.7 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Rockwell C Hardness | 28 | |
| 29 |
| Shear Modulus, GPa | 98 | |
| 100 |
| Tensile Strength: Ultimate (UTS), MPa | 860 | |
| 860 |
| Tensile Strength: Yield (Proof), MPa | 580 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 160 | |
| 160 |
| Specific Heat Capacity, J/kg-K | 120 | |
| 120 |
| Thermal Conductivity, W/m-K | 21 | |
| 20 |
| Thermal Expansion, µm/m-K | 5.1 | |
| 4.6 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 12 | |
| 13 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.4 | |
| 7.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 15 | |
| 15 |
| Embodied Carbon, kg CO2/kg material | 22 | |
| 23 |
| Embodied Energy, MJ/kg | 340 | |
| 350 |
| Embodied Water, L/kg | 140 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 44 | |
| 44 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 660 | |
| 640 |
| Stiffness to Weight: Axial, points | 9.6 | |
| 9.6 |
| Stiffness to Weight: Bending, points | 14 | |
| 14 |
| Strength to Weight: Axial, points | 16 | |
| 16 |
| Strength to Weight: Bending, points | 14 | |
| 13 |
| Thermal Diffusivity, mm2/s | 12 | |
| 11 |
| Thermal Shock Resistance, points | 48 | |
| 52 |
Alloy Composition
| Tungsten (W), % | 90 | |
| 92.5 |
| Residuals, % | 0 | |
| 7.5 |