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Z21210 Zinc vs. ZK40A Magnesium

Z21210 zinc belongs to the zinc alloys classification, while ZK40A magnesium belongs to the magnesium alloys. There are 12 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is Z21210 zinc and the bottom bar is ZK40A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Tensile Strength: Ultimate (UTS), MPa 150 to 170
280

Thermal Properties

Melting Completion (Liquidus), °C 420
600
Melting Onset (Solidus), °C 420
540
Specific Heat Capacity, J/kg-K 400
970
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 32
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
27
Electrical Conductivity: Equal Weight (Specific), % IACS 35
130

Otherwise Unclassified Properties

Density, g/cm3 7.1
1.8

Common Calculations

Strength to Weight: Axial, points 5.7 to 6.4
43
Strength to Weight: Bending, points 8.6 to 9.4
53
Thermal Diffusivity, mm2/s 38
62