Grade 702C Zirconium vs. Grade 705C Zirconium
Both grade 702C zirconium and grade 705C zirconium are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is grade 702C zirconium and the bottom bar is grade 705C zirconium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 97 | |
| 98 |
| Elongation at Break, % | 13 | |
| 13 |
| Poisson's Ratio | 0.34 | |
| 0.34 |
| Rockwell B Hardness | 84 | |
| 87 |
| Shear Modulus, GPa | 36 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 540 |
| Tensile Strength: Yield (Proof), MPa | 310 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 270 |
| Thermal Conductivity, W/m-K | 22 | |
| 18 |
| Thermal Expansion, µm/m-K | 5.7 | |
| 5.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.7 | |
| 6.7 |
| Embodied Water, L/kg | 450 | |
| 450 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 52 | |
| 66 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 790 |
| Stiffness to Weight: Axial, points | 8.1 | |
| 8.1 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 18 | |
| 22 |
| Strength to Weight: Bending, points | 19 | |
| 22 |
| Thermal Diffusivity, mm2/s | 12 | |
| 9.9 |
| Thermal Shock Resistance, points | 55 | |
| 69 |
Alloy Composition
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.1 |
| Hafnium (Hf), % | 0 to 4.5 | |
| 0 to 4.5 |
| Hydrogen (H), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Iron (Fe), % | 0 to 0.3 | |
| 0 to 0.3 |
| Niobium (Nb), % | 0 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 to 0.25 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.010 |
| Zirconium (Zr), % | 94.8 to 100 | |
| 91.9 to 98 |