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AS41A Magnesium vs. Z21721 Zinc

AS41A 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 AS41A 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, % 11
40
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 17
35
Tensile Strength: Ultimate (UTS), MPa 230
150
Tensile Strength: Yield (Proof), MPa 140
120

Thermal Properties

Latent Heat of Fusion, J/g 370
110
Maximum Temperature: Mechanical, °C 110
90
Melting Completion (Liquidus), °C 620
410
Melting Onset (Solidus), °C 570
390
Specific Heat Capacity, J/kg-K 1000
390
Thermal Conductivity, W/m-K 68
110
Thermal Expansion, µm/m-K 26
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
27
Electrical Conductivity: Equal Weight (Specific), % IACS 92
37

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.6
6.6
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 980
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
57
Resilience: Unit (Modulus of Resilience), kJ/m3 220
88
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 72
22
Strength to Weight: Axial, points 38
6.4
Strength to Weight: Bending, points 50
9.6
Thermal Diffusivity, mm2/s 41
44
Thermal Shock Resistance, points 14
4.8

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0 to 0.0020
Cadmium (Cd), % 0
0 to 0.070
Copper (Cu), % 0 to 0.060
0 to 0.0050
Iron (Fe), % 0
0 to 0.010
Lead (Pb), % 0
0 to 1.0
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0.5 to 1.5
0
Titanium (Ti), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.12
98.9 to 100