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EN-MC21120 Magnesium vs. 7075 Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while 7075 aluminum belongs to the aluminum alloys. There are 30 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-MC21120 magnesium and the bottom bar is 7075 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
70
Elongation at Break, % 2.2 to 6.7
1.8 to 12
Fatigue Strength, MPa 84 to 96
110 to 190
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
26
Shear Strength, MPa 110 to 160
150 to 340
Tensile Strength: Ultimate (UTS), MPa 200 to 270
240 to 590
Tensile Strength: Yield (Proof), MPa 130 to 170
120 to 510

Thermal Properties

Latent Heat of Fusion, J/g 350
380
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 490
480
Specific Heat Capacity, J/kg-K 990
870
Thermal Conductivity, W/m-K 76
130
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
33
Electrical Conductivity: Equal Weight (Specific), % IACS 59
98

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
3.0
Embodied Carbon, kg CO2/kg material 22
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
7.8 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
110 to 1870
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
46
Strength to Weight: Axial, points 31 to 43
22 to 54
Strength to Weight: Bending, points 43 to 53
28 to 52
Thermal Diffusivity, mm2/s 44
50
Thermal Shock Resistance, points 11 to 16
10 to 25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
86.9 to 91.4
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 0 to 0.030
1.2 to 2.0
Iron (Fe), % 0 to 0.0050
0 to 0.5
Magnesium (Mg), % 88.6 to 91.3
2.1 to 2.9
Manganese (Mn), % 0.1 to 0.5
0 to 0.3
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.2
0 to 0.4
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
5.1 to 6.1
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0 to 0.010
0 to 0.15

Comparable Variants