R30035 Cobalt vs. Nuclear Grade Hafnium
R30035 cobalt belongs to the cobalt alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 78 |
| Elongation at Break, % | 9.0 to 46 | |
| 25 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 84 to 89 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 140 |
| Thermal Expansion, µm/m-K | 13 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.7 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 180 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 11 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 7.4 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 8.4 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 55 |
Alloy Composition
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| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |