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AZ91A Magnesium vs. EN AC-43400 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while EN AC-43400 aluminum belongs to the aluminum alloys. There are 30 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 AZ91A magnesium and the bottom bar is EN AC-43400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
80
Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 5.0
1.1
Fatigue Strength, MPa 99
110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Tensile Strength: Ultimate (UTS), MPa 240
270
Tensile Strength: Yield (Proof), MPa 160
160

Thermal Properties

Latent Heat of Fusion, J/g 360
540
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
600
Melting Onset (Solidus), °C 470
590
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
140
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
32
Electrical Conductivity: Equal Weight (Specific), % IACS 52
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.6
Embodied Carbon, kg CO2/kg material 22
7.8
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 280
180
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 69
54
Strength to Weight: Axial, points 38
29
Strength to Weight: Bending, points 49
36
Thermal Diffusivity, mm2/s 42
59
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
86 to 90.8
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0
0 to 1.0
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 88.2 to 91.2
0.2 to 0.5
Manganese (Mn), % 0.13 to 0.5
0 to 0.55
Nickel (Ni), % 0 to 0.030
0 to 0.15
Silicon (Si), % 0 to 0.5
9.0 to 11
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
0 to 0.15
Residuals, % 0
0 to 0.15