Reactor Grade Zirconium vs. Grade 31 Titanium
Reactor grade zirconium belongs to the otherwise unclassified metals classification, while grade 31 titanium belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is reactor grade zirconium and the bottom bar is grade 31 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 98 | |
| 110 |
| Elongation at Break, % | 21 | |
| 20 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 37 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 330 | |
| 510 |
| Tensile Strength: Yield (Proof), MPa | 160 | |
| 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 420 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 540 |
| Thermal Conductivity, W/m-K | 22 | |
| 21 |
| Thermal Expansion, µm/m-K | 5.9 | |
| 8.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.5 | |
| 4.5 |
| Embodied Water, L/kg | 280 | |
| 230 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 56 | |
| 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 | |
| 940 |
| Stiffness to Weight: Axial, points | 8.4 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 14 | |
| 32 |
| Strength to Weight: Bending, points | 16 | |
| 32 |
| Thermal Diffusivity, mm2/s | 13 | |
| 8.5 |
| Thermal Shock Resistance, points | 41 | |
| 39 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0 to 0.080 |
| Cobalt (Co), % | 0 | |
| 0.2 to 0.8 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.35 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Titanium (Ti), % | 0 | |
| 97.9 to 99.76 |
| Zirconium (Zr), % | 99.7 to 100 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |