Nuclear Grade Hafnium vs. Nickel 718
Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while nickel 718 belongs to the nickel alloys. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 190 |
| Elongation at Break, % | 25 | |
| 12 to 50 |
| Poisson's Ratio | 0.26 | |
| 0.29 |
| Shear Modulus, GPa | 31 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 930 to 1530 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 510 to 1330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 450 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 8.3 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 73 | |
| 140 to 390 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 | |
| 660 to 4560 |
| Stiffness to Weight: Axial, points | 3.3 | |
| 13 |
| Stiffness to Weight: Bending, points | 11 | |
| 23 |
| Strength to Weight: Axial, points | 7.4 | |
| 31 to 51 |
| Strength to Weight: Bending, points | 8.4 | |
| 25 to 35 |
| Thermal Shock Resistance, points | 55 | |
| 27 to 44 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Hafnium (Hf), % | 99.8 to 100 | |
| 0 |
| Iron (Fe), % | 0 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 | |
| 50 to 55 |
| Niobium (Nb), % | 0 | |
| 4.8 to 5.5 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.65 to 1.2 |
| Residuals, % | 0 to 0.23 | |
| 0 |