Nuclear Grade Hafnium vs. EN 1.7231 Steel
Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while EN 1.7231 steel belongs to the iron alloys. 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 nuclear grade hafnium and the bottom bar is EN 1.7231 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 190 |
| Elongation at Break, % | 25 | |
| 11 to 12 |
| Poisson's Ratio | 0.26 | |
| 0.29 |
| Shear Modulus, GPa | 31 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 790 to 930 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 570 to 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 250 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 470 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 7.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 73 | |
| 87 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 | |
| 870 to 1700 |
| Stiffness to Weight: Axial, points | 3.3 | |
| 13 |
| Stiffness to Weight: Bending, points | 11 | |
| 24 |
| Strength to Weight: Axial, points | 7.4 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 8.4 | |
| 24 to 27 |
| Thermal Shock Resistance, points | 55 | |
| 23 to 27 |
Alloy Composition
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| Carbon (C), % | 0 | |
| 0.38 to 0.45 |
| Chromium (Cr), % | 0 | |
| 0.8 to 1.2 |
| Hafnium (Hf), % | 99.8 to 100 | |
| 0 |
| Iron (Fe), % | 0 | |
| 96.4 to 98.1 |
| Manganese (Mn), % | 0 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Residuals, % | 0 to 0.23 | |
| 0 |