Nuclear Grade Hafnium vs. ASTM B685 Alloy
Both nuclear grade hafnium and ASTM B685 alloy are otherwise unclassified metals. There are 13 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is ASTM B685 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 120 |
| Poisson's Ratio | 0.26 | |
| 0.37 |
| Shear Modulus, GPa | 31 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 660 to 1060 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 180 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 300 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 11 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.3 | |
| 6.1 |
| Stiffness to Weight: Bending, points | 11 | |
| 15 |
| Strength to Weight: Axial, points | 7.4 | |
| 17 to 27 |
| Strength to Weight: Bending, points | 8.4 | |
| 16 to 21 |
| Thermal Shock Resistance, points | 55 | |
| 28 to 46 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 39.5 to 40.5 |
| Hafnium (Hf), % | 99.8 to 100 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Palladium (Pd), % | 0 | |
| 59 to 60.5 |
| Silver (Ag), % | 0 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0 | |
| 0 to 0.060 |
| Residuals, % | 0 to 0.23 | |
| 0 to 0.2 |