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AZ91B Magnesium vs. Z40301 Zinc

AZ91B magnesium belongs to the magnesium alloys classification, while Z40301 zinc belongs to the zinc alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 AZ91B magnesium and the bottom bar is Z40301 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
87
Elongation at Break, % 5.0
60
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 18
35
Tensile Strength: Ultimate (UTS), MPa 240
190
Tensile Strength: Yield (Proof), MPa 160
150

Thermal Properties

Latent Heat of Fusion, J/g 360
110
Maximum Temperature: Mechanical, °C 130
90
Melting Completion (Liquidus), °C 600
410
Melting Onset (Solidus), °C 470
400
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
110
Thermal Expansion, µm/m-K 26
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
27
Electrical Conductivity: Equal Weight (Specific), % IACS 58
37

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 1.7
6.6
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 990
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
100
Resilience: Unit (Modulus of Resilience), kJ/m3 280
130
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
7.9
Strength to Weight: Bending, points 49
11
Thermal Diffusivity, mm2/s 42
44
Thermal Shock Resistance, points 14
5.9

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.010
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 0 to 0.35
0.5 to 1.0
Iron (Fe), % 0
0 to 0.010
Lead (Pb), % 0
0 to 0.010
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 0
0 to 0.040
Zinc (Zn), % 0.35 to 1.0
98.9 to 99.5