Z21210 Zinc vs. Solder Alloy 721
Z21210 zinc belongs to the zinc alloys classification, while solder alloy 721 belongs to the otherwise unclassified metals. There are 12 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 Z21210 zinc and the bottom bar is solder alloy 721.
Metric UnitsUS Customary Units
Mechanical Properties
| Tensile Strength: Ultimate (UTS), MPa | 150 to 170 | |
| 50 |
Thermal Properties
| Melting Completion (Liquidus), °C | 420 | |
| 220 |
| Melting Onset (Solidus), °C | 420 | |
| 210 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 220 |
| Thermal Conductivity, W/m-K | 110 | |
| 56 |
| Thermal Expansion, µm/m-K | 32 | |
| 22 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 14 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 35 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.1 | |
| 7.4 |
Common Calculations
| Strength to Weight: Axial, points | 5.7 to 6.4 | |
| 1.9 |
| Strength to Weight: Bending, points | 8.6 to 9.4 | |
| 4.1 |
| Thermal Diffusivity, mm2/s | 38 | |
| 34 |