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AZ91A Magnesium vs. Z21210 Zinc

AZ91A 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 AZ91A magnesium and the bottom bar is Z21210 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Melting Completion (Liquidus), °C 600
Melting Onset (Solidus), °C 470
Specific Heat Capacity, J/kg-K 990
Thermal Conductivity, W/m-K 73
Thermal Expansion, µm/m-K 26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
Electrical Conductivity: Equal Weight (Specific), % IACS 52

Otherwise Unclassified Properties

Density, g/cm3 1.7

Common Calculations

Strength to Weight: Axial, points 38
5.7 to 6.4
Strength to Weight: Bending, points 49
8.6 to 9.4
Thermal Diffusivity, mm2/s 42