Nuclear Grade Hafnium vs. Austempered Cast Iron
Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while austempered cast iron belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is austempered cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 180 |
| Elongation at Break, % | 25 | |
| 1.1 to 13 |
| Poisson's Ratio | 0.26 | |
| 0.29 |
| Shear Modulus, GPa | 31 | |
| 62 to 69 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 860 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 560 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 280 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 490 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 7.5 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 73 | |
| 19 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 | |
| 880 to 3970 |
| Stiffness to Weight: Axial, points | 3.3 | |
| 13 |
| Stiffness to Weight: Bending, points | 11 | |
| 25 |
| Strength to Weight: Axial, points | 7.4 | |
| 32 to 66 |
| Strength to Weight: Bending, points | 8.4 | |
| 27 to 44 |
| Thermal Shock Resistance, points | 55 | |
| 25 to 53 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.050 |
| Arsenic (As), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 | |
| 3.4 to 3.8 |
| Chromium (Cr), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 | |
| 0 to 0.8 |
| Hafnium (Hf), % | 99.8 to 100 | |
| 0 |
| Iron (Fe), % | 0 | |
| 89.6 to 94 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.040 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 | |
| 0 to 2.0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Selenium (Se), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 2.3 to 2.7 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Tin (Sn), % | 0 | |
| 0 to 0.020 |
| Vanadium (V), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 to 0.23 | |
| 0 |