Z21210 Zinc vs. R30021 Cobalt
Z21210 zinc belongs to the zinc alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 12 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.
For each property being compared, the top bar is Z21210 zinc and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Tensile Strength: Ultimate (UTS), MPa | 150 to 170 | |
| 700 |
Thermal Properties
| Melting Completion (Liquidus), °C | 420 | |
| 1350 |
| Melting Onset (Solidus), °C | 420 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 450 |
| Thermal Conductivity, W/m-K | 110 | |
| 15 |
| Thermal Expansion, µm/m-K | 32 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 35 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.1 | |
| 8.4 |
Common Calculations
| Strength to Weight: Axial, points | 5.7 to 6.4 | |
| 23 |
| Strength to Weight: Bending, points | 8.6 to 9.4 | |
| 21 |
| Thermal Diffusivity, mm2/s | 38 | |
| 3.8 |