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AZ81A Magnesium vs. Z21210 Zinc

AZ81A magnesium belongs to the magnesium alloys classification, while Z21210 zinc belongs to the zinc alloys. There are 12 material properties with values for both materials. Properties with values for just one material (22, 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 AZ81A magnesium and the bottom bar is Z21210 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Tensile Strength: Ultimate (UTS), MPa 160 to 240
150 to 170

Thermal Properties

Melting Completion (Liquidus), °C 600
420
Melting Onset (Solidus), °C 500
420
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 84
110
Thermal Expansion, µm/m-K 27
32

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
28
Electrical Conductivity: Equal Weight (Specific), % IACS 65
35

Otherwise Unclassified Properties

Density, g/cm3 1.7
7.1

Common Calculations

Strength to Weight: Axial, points 26 to 39
5.7 to 6.4
Strength to Weight: Bending, points 38 to 50
8.6 to 9.4
Thermal Diffusivity, mm2/s 50
38