ZA-12 vs. R30021 Cobalt
ZA-12 belongs to the zinc alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 28 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 ZA-12 and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 230 to 270 | |
| 1300 |
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 220 |
| Elongation at Break, % | 1.6 to 5.3 | |
| 9.0 |
| Fatigue Strength, MPa | 73 to 120 | |
| 250 |
| Poisson's Ratio | 0.26 | |
| 0.29 |
| Shear Modulus, GPa | 33 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 260 to 400 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 210 to 320 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 120 | |
| 330 |
| Melting Completion (Liquidus), °C | 430 | |
| 1350 |
| Melting Onset (Solidus), °C | 380 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Conductivity, W/m-K | 120 | |
| 15 |
| Thermal Expansion, µm/m-K | 24 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 42 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.0 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.4 | |
| 8.0 |
| Embodied Energy, MJ/kg | 64 | |
| 110 |
| Embodied Water, L/kg | 440 | |
| 520 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.0 to 20 | |
| 57 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 620 | |
| 570 |
| Stiffness to Weight: Axial, points | 7.6 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 12 to 19 | |
| 23 |
| Strength to Weight: Bending, points | 15 to 20 | |
| 21 |
| Thermal Diffusivity, mm2/s | 43 | |
| 3.8 |
| Thermal Shock Resistance, points | 9.4 to 14 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 10.5 to 11.5 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.0060 | |
| 0 |
| Carbon (C), % | 0 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 29 |
| Cobalt (Co), % | 0 | |
| 61.7 to 67.3 |
| Copper (Cu), % | 0.5 to 1.2 | |
| 0 |
| Iron (Fe), % | 0 to 0.075 | |
| 0 to 3.0 |
| Lead (Pb), % | 0 to 0.0060 | |
| 0 |
| Magnesium (Mg), % | 0.015 to 0.030 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 0 to 0.020 | |
| 2.0 to 3.0 |
| Silicon (Si), % | 0 to 0.060 | |
| 0 to 1.5 |
| Tin (Sn), % | 0 to 0.0030 | |
| 0 |
| Zinc (Zn), % | 87.1 to 89 | |
| 0 |