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EN-MC65120 Magnesium vs. 7021 Aluminum

EN-MC65120 magnesium belongs to the magnesium alloys classification, while 7021 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN-MC65120 magnesium and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
69
Elongation at Break, % 3.1
9.4
Fatigue Strength, MPa 80
150
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
26
Shear Strength, MPa 92
270
Tensile Strength: Ultimate (UTS), MPa 160
460
Tensile Strength: Yield (Proof), MPa 110
390

Thermal Properties

Latent Heat of Fusion, J/g 330
380
Maximum Temperature: Mechanical, °C 180
200
Melting Completion (Liquidus), °C 590
630
Melting Onset (Solidus), °C 520
510
Specific Heat Capacity, J/kg-K 970
870
Thermal Conductivity, W/m-K 100
150
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
38
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.5
Density, g/cm3 1.9
2.9
Embodied Carbon, kg CO2/kg material 25
8.3
Embodied Energy, MJ/kg 190
150
Embodied Water, L/kg 930
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
41
Resilience: Unit (Modulus of Resilience), kJ/m3 140
1110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
47
Strength to Weight: Axial, points 23
44
Strength to Weight: Bending, points 34
45
Thermal Diffusivity, mm2/s 56
59
Thermal Shock Resistance, points 9.8
20

Alloy Composition


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Aluminum (Al), % 0
90.7 to 93.7
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 0 to 0.030
0 to 0.25
Iron (Fe), % 0 to 0.010
0 to 0.4
Magnesium (Mg), % 91.8 to 95.1
1.2 to 1.8
Manganese (Mn), % 0 to 0.15
0 to 0.1
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.010
0 to 0.25
Titanium (Ti), % 0
0 to 0.1
Unspecified Rare Earths, % 2.5 to 4.0
0
Zinc (Zn), % 2.0 to 3.0
5.0 to 6.0
Zirconium (Zr), % 0.4 to 1.0
0.080 to 0.18
Residuals, % 0 to 0.010
0 to 0.15