Commercially Pure Zirconium vs. R30021 Cobalt
Commercially pure zirconium belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is commercially pure zirconium and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 98 | |
| 220 |
| Elongation at Break, % | 18 | |
| 9.0 |
| Fatigue Strength, MPa | 60 | |
| 250 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 36 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 240 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 330 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 450 |
| Thermal Conductivity, W/m-K | 22 | |
| 15 |
| Thermal Expansion, µm/m-K | 5.5 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.7 | |
| 8.4 |
| Embodied Water, L/kg | 450 | |
| 520 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 65 | |
| 57 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 | |
| 570 |
| Stiffness to Weight: Axial, points | 8.1 | |
| 15 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 18 | |
| 23 |
| Strength to Weight: Bending, points | 19 | |
| 21 |
| Thermal Diffusivity, mm2/s | 12 | |
| 3.8 |
| Thermal Shock Resistance, points | 56 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 to 0.2 | |
| 26 to 29 |
| Cobalt (Co), % | 0 | |
| 61.7 to 67.3 |
| Hafnium (Hf), % | 0 to 4.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0050 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 3.0 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 0 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0 to 0.025 | |
| 0 |
| Oxygen (O), % | 0 to 0.16 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 1.5 |
| Zirconium (Zr), % | 94.7 to 100 | |
| 0 |