R30008 Cobalt vs. Grade 705C Zirconium
R30008 cobalt belongs to the cobalt alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is grade 705C zirconium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 98 |
| Elongation at Break, % | 1.1 to 73 | |
| 13 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 83 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 540 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 270 |
| Thermal Expansion, µm/m-K | 13 | |
| 5.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 6.7 |
| Embodied Water, L/kg | 400 | |
| 450 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 790 |
| Stiffness to Weight: Axial, points | 14 | |
| 8.1 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 22 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 22 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 69 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.1 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 0 to 4.5 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0050 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 0.3 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 91.9 to 98 |