Nickel 690 vs. Nuclear Grade Hafnium
Nickel 690 belongs to the nickel 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 (14, in this case) are not shown.
For each property being compared, the top bar is nickel 690 and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 78 |
| Elongation at Break, % | 3.4 to 34 | |
| 25 |
| Poisson's Ratio | 0.28 | |
| 0.26 |
| Shear Modulus, GPa | 79 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 990 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 250 to 760 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 140 |
| Thermal Expansion, µm/m-K | 14 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.3 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 to 170 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 to 1440 | |
| 180 |
| Stiffness to Weight: Axial, points | 13 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 24 | |
| 11 |
| Strength to Weight: Axial, points | 21 to 33 | |
| 7.4 |
| Strength to Weight: Bending, points | 20 to 27 | |
| 8.4 |
| Thermal Shock Resistance, points | 16 to 25 | |
| 55 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Chromium (Cr), % | 27 to 31 | |
| 0 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Iron (Fe), % | 7.0 to 11 | |
| 0 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 58 to 66 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |