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8090 Aluminum vs. AZ31C Magnesium

8090 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 8090 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
45
Elongation at Break, % 3.5 to 13
12
Fatigue Strength, MPa 91 to 140
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
17
Tensile Strength: Ultimate (UTS), MPa 340 to 490
260
Tensile Strength: Yield (Proof), MPa 210 to 420
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 190
110
Melting Completion (Liquidus), °C 660
600
Melting Onset (Solidus), °C 600
550
Specific Heat Capacity, J/kg-K 960
990
Thermal Conductivity, W/m-K 95 to 160
130
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
19
Electrical Conductivity: Equal Weight (Specific), % IACS 66
98

Otherwise Unclassified Properties

Base Metal Price, % relative 18
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.6
23
Embodied Energy, MJ/kg 170
160
Embodied Water, L/kg 1160
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 41
28
Resilience: Unit (Modulus of Resilience), kJ/m3 340 to 1330
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 34 to 49
42
Strength to Weight: Bending, points 39 to 50
53
Thermal Diffusivity, mm2/s 36 to 60
74
Thermal Shock Resistance, points 15 to 22
16

Alloy Composition

Aluminum (Al), % 93 to 98.4
2.4 to 3.6
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 1.0 to 1.6
0 to 0.1
Iron (Fe), % 0 to 0.3
0
Lithium (Li), % 2.2 to 2.7
0
Magnesium (Mg), % 0.6 to 1.3
93.4 to 97
Manganese (Mn), % 0 to 0.1
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0.5 to 1.5
Zirconium (Zr), % 0.040 to 0.16
0
Residuals, % 0
0 to 0.3