Class 4 Tungsten vs. Class 1 Tungsten
Both class 4 tungsten and class 1 tungsten are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 93% of their average alloy composition in common.
For each property being compared, the top bar is class 4 tungsten and the bottom bar is class 1 tungsten.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 270 | |
| 250 |
| Elongation at Break, % | 2.3 | |
| 5.7 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Rockwell C Hardness | 31 | |
| 28 |
| Shear Modulus, GPa | 110 | |
| 98 |
| Tensile Strength: Ultimate (UTS), MPa | 790 | |
| 860 |
| Tensile Strength: Yield (Proof), MPa | 580 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 170 | |
| 160 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 120 |
| Thermal Conductivity, W/m-K | 30 | |
| 21 |
| Thermal Expansion, µm/m-K | 4.5 | |
| 5.1 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 17 | |
| 12 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.7 | |
| 7.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 16 | |
| 15 |
| Embodied Carbon, kg CO2/kg material | 24 | |
| 22 |
| Embodied Energy, MJ/kg | 360 | |
| 340 |
| Embodied Water, L/kg | 150 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 16 | |
| 44 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 620 | |
| 660 |
| Stiffness to Weight: Axial, points | 9.6 | |
| 9.6 |
| Stiffness to Weight: Bending, points | 14 | |
| 14 |
| Strength to Weight: Axial, points | 14 | |
| 16 |
| Strength to Weight: Bending, points | 12 | |
| 14 |
| Thermal Diffusivity, mm2/s | 15 | |
| 12 |
| Thermal Shock Resistance, points | 46 | |
| 48 |
Alloy Composition
| Tungsten (W), % | 97 | |
| 90 |
| Residuals, % | 0 | |
| 10 |