C18700 Copper vs. Nuclear Grade Hafnium
C18700 copper belongs to the copper alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is C18700 copper and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 78 |
| Elongation at Break, % | 9.0 to 9.6 | |
| 25 |
| Poisson's Ratio | 0.34 | |
| 0.26 |
| Shear Modulus, GPa | 43 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 290 to 330 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 230 to 250 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 140 |
| Thermal Expansion, µm/m-K | 17 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.0 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 24 to 29 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 240 to 280 | |
| 180 |
| Stiffness to Weight: Axial, points | 7.1 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 18 | |
| 11 |
| Strength to Weight: Axial, points | 9.0 to 10 | |
| 7.4 |
| Strength to Weight: Bending, points | 11 to 12 | |
| 8.4 |
| Thermal Shock Resistance, points | 10 to 12 | |
| 55 |
Alloy Composition
| Copper (Cu), % | 98 to 99.2 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Lead (Pb), % | 0.8 to 1.5 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |