Commercially Pure Zirconium vs. R30035 Cobalt
Commercially pure zirconium belongs to the otherwise unclassified metals classification, while R30035 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 R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 98 | |
| 220 to 230 |
| Elongation at Break, % | 18 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 60 | |
| 170 to 740 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 36 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 240 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 440 |
| Thermal Conductivity, W/m-K | 22 | |
| 11 |
| Thermal Expansion, µm/m-K | 5.5 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.7 | |
| 8.7 |
| Embodied Water, L/kg | 450 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 65 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 8.1 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 18 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 19 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 12 | |
| 3.0 |
| Thermal Shock Resistance, points | 56 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0 to 0.2 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Hafnium (Hf), % | 0 to 4.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0050 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 0 | |
| 33 to 37 |
| Nitrogen (N), % | 0 to 0.025 | |
| 0 |
| Oxygen (O), % | 0 to 0.16 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Zirconium (Zr), % | 94.7 to 100 | |
| 0 |