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1080A Aluminum vs. AZ91D Magnesium

1080A aluminum belongs to the aluminum alloys classification, while AZ91D magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 1080A aluminum and the bottom bar is AZ91D magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 18 to 40
60 to 80
Elastic (Young's, Tensile) Modulus, GPa 68
46
Elongation at Break, % 2.3 to 34
2.3 to 4.5
Fatigue Strength, MPa 18 to 50
74 to 85
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 49 to 81
120 to 140
Tensile Strength: Ultimate (UTS), MPa 74 to 140
160 to 220
Tensile Strength: Yield (Proof), MPa 17 to 120
80 to 130

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 170
130
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 640
490
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 230
78
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 62
11
Electrical Conductivity: Equal Weight (Specific), % IACS 200
58

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.3
22
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 1200
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1 to 19
4.2 to 7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 100
69 to 170
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
69
Strength to Weight: Axial, points 7.6 to 15
26 to 34
Strength to Weight: Bending, points 14 to 22
38 to 46
Thermal Diffusivity, mm2/s 94
45
Thermal Shock Resistance, points 3.3 to 6.4
9.5 to 13

Alloy Composition

Aluminum (Al), % 99.8 to 100
8.3 to 9.7
Copper (Cu), % 0 to 0.030
0 to 0.030
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.15
0 to 0.0050
Magnesium (Mg), % 0 to 0.020
88.7 to 91.2
Manganese (Mn), % 0 to 0.020
0.15 to 0.5
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0 to 0.15
0 to 0.1
Titanium (Ti), % 0 to 0.020
0
Zinc (Zn), % 0 to 0.060
0.35 to 1.0