R30003 Cobalt vs. ZA-8
R30003 cobalt belongs to the cobalt alloys classification, while ZA-8 belongs to the zinc alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R30003 cobalt and the bottom bar is ZA-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 85 to 86 |
| Elongation at Break, % | 10 to 73 | |
| 1.3 to 8.0 |
| Fatigue Strength, MPa | 320 to 560 | |
| 51 to 100 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 83 | |
| 34 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 210 to 370 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
| 210 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 110 |
| Melting Completion (Liquidus), °C | 1400 | |
| 400 |
| Melting Onset (Solidus), °C | 1440 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 440 |
| Thermal Conductivity, W/m-K | 13 | |
| 120 |
| Thermal Expansion, µm/m-K | 13 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 40 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 11 |
| Density, g/cm3 | 8.4 | |
| 6.3 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 3.3 |
| Embodied Energy, MJ/kg | 110 | |
| 62 |
| Embodied Water, L/kg | 400 | |
| 420 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
| 260 to 490 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 9.3 to 17 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 12 to 18 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 42 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 7.6 to 13 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 8.0 to 8.8 |
| Boron (B), % | 0 to 0.1 | |
| 0 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0 to 0.15 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 39 to 41 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.8 to 1.3 |
| Iron (Fe), % | 10 to 20.5 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 | |
| 0.015 to 0.030 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 0 |
| Nickel (Ni), % | 14 to 16 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.045 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Zinc (Zn), % | 0 | |
| 89.7 to 91.2 |