ASTM B522 Class I vs. Nuclear Grade Hafnium
Both ASTM B522 class I and nuclear grade hafnium are otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is ASTM B522 class I and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 96 | |
| 78 |
| Elongation at Break, % | 1.1 to 29 | |
| 25 |
| Poisson's Ratio | 0.41 | |
| 0.26 |
| Shear Modulus, GPa | 34 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 490 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 120 to 210 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 77 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 140 |
| Thermal Expansion, µm/m-K | 15 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.5 to 64 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 75 to 230 | |
| 180 |
| Stiffness to Weight: Axial, points | 3.1 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 11 |
| Strength to Weight: Axial, points | 4.4 to 7.8 | |
| 7.4 |
| Strength to Weight: Bending, points | 5.5 to 8.0 | |
| 8.4 |
| Thermal Shock Resistance, points | 13 to 24 | |
| 55 |
Alloy Composition
| Gold (Au), % | 68 to 70 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Platinum (Pt), % | 5.0 to 7.0 | |
| 0 |
| Silver (Ag), % | 23.5 to 26.5 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |