Nuclear Grade Hafnium vs. Titanium 15-3-3-3
Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while titanium 15-3-3-3 belongs to the titanium alloys. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is titanium 15-3-3-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 100 |
| Elongation at Break, % | 25 | |
| 5.7 to 8.0 |
| Poisson's Ratio | 0.26 | |
| 0.33 |
| Shear Modulus, GPa | 31 | |
| 39 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 1120 to 1390 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 1100 to 1340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 390 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 520 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 9.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 4.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 73 | |
| 78 to 89 |
| Stiffness to Weight: Axial, points | 3.3 | |
| 12 |
| Stiffness to Weight: Bending, points | 11 | |
| 32 |
| Strength to Weight: Axial, points | 7.4 | |
| 64 to 80 |
| Strength to Weight: Bending, points | 8.4 | |
| 50 to 57 |
| Thermal Shock Resistance, points | 55 | |
| 79 to 98 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0 | |
| 2.5 to 3.5 |
| Hafnium (Hf), % | 99.8 to 100 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 | |
| 0 to 0.25 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.13 |
| Tin (Sn), % | 0 | |
| 2.5 to 3.5 |
| Titanium (Ti), % | 0 | |
| 72.6 to 78.5 |
| Vanadium (V), % | 0 | |
| 14 to 16 |
| Residuals, % | 0 | |
| 0 to 0.4 |