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ZK40A Magnesium vs. Z21721 Zinc

ZK40A magnesium belongs to the magnesium alloys classification, while Z21721 zinc belongs to the zinc alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, 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 ZK40A magnesium and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
87
Elongation at Break, % 4.2
40
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 17
35
Tensile Strength: Ultimate (UTS), MPa 280
150
Tensile Strength: Yield (Proof), MPa 260
120

Thermal Properties

Latent Heat of Fusion, J/g 340
110
Maximum Temperature: Mechanical, °C 120
90
Melting Completion (Liquidus), °C 600
410
Melting Onset (Solidus), °C 540
390
Specific Heat Capacity, J/kg-K 970
390
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 26
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
27
Electrical Conductivity: Equal Weight (Specific), % IACS 130
37

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 1.8
6.6
Embodied Carbon, kg CO2/kg material 24
2.8
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 950
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
57
Resilience: Unit (Modulus of Resilience), kJ/m3 740
88
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 65
22
Strength to Weight: Axial, points 43
6.4
Strength to Weight: Bending, points 53
9.6
Thermal Diffusivity, mm2/s 62
44
Thermal Shock Resistance, points 17
4.8

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0020
Cadmium (Cd), % 0
0 to 0.070
Copper (Cu), % 0
0 to 0.0050
Iron (Fe), % 0
0 to 0.010
Lead (Pb), % 0
0 to 1.0
Magnesium (Mg), % 94.2 to 96.1
0
Titanium (Ti), % 0
0 to 0.020
Zinc (Zn), % 3.5 to 4.5
98.9 to 100
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0