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EN-MC21320 Magnesium vs. 8079 Aluminum

EN-MC21320 magnesium belongs to the magnesium alloys classification, while 8079 aluminum belongs to the aluminum 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 EN-MC21320 magnesium and the bottom bar is 8079 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
69
Elongation at Break, % 7.5
2.2
Fatigue Strength, MPa 95
56
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Tensile Strength: Ultimate (UTS), MPa 230
150
Tensile Strength: Yield (Proof), MPa 140
120

Thermal Properties

Latent Heat of Fusion, J/g 370
400
Maximum Temperature: Mechanical, °C 110
170
Melting Completion (Liquidus), °C 600
650
Melting Onset (Solidus), °C 530
640
Specific Heat Capacity, J/kg-K 1000
900
Thermal Conductivity, W/m-K 66
230
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
58
Electrical Conductivity: Equal Weight (Specific), % IACS 91
190

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 1.6
2.8
Embodied Carbon, kg CO2/kg material 23
8.2
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 980
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 200
110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
50
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 50
22
Thermal Diffusivity, mm2/s 40
92
Thermal Shock Resistance, points 13
6.4

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
98.1 to 99.3
Copper (Cu), % 0 to 0.010
0 to 0.050
Iron (Fe), % 0 to 0.0050
0.7 to 1.3
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0.5 to 1.5
0.050 to 0.3
Zinc (Zn), % 0 to 0.2
0 to 0.1
Residuals, % 0 to 0.010
0 to 0.15