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7020 Aluminum vs. QE22A Magnesium

7020 aluminum belongs to the aluminum alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is 7020 aluminum and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
80
Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 8.4 to 14
2.4
Fatigue Strength, MPa 110 to 130
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 110 to 230
150
Tensile Strength: Ultimate (UTS), MPa 190 to 390
250
Tensile Strength: Yield (Proof), MPa 120 to 310
190

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 210
250
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 610
570
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
25
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Density, g/cm3 2.9
2.0
Embodied Carbon, kg CO2/kg material 8.3
27
Embodied Energy, MJ/kg 150
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
60
Strength to Weight: Axial, points 18 to 37
36
Strength to Weight: Bending, points 25 to 41
46
Thermal Diffusivity, mm2/s 59
59
Thermal Shock Resistance, points 8.3 to 17
15

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0 to 0.1
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 1.0 to 1.4
93.1 to 95.8
Manganese (Mn), % 0.050 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.35
0
Silver (Ag), % 0
2.0 to 3.0
Titanium (Ti), % 0 to 0.25
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0.4 to 1.0
Residuals, % 0
0 to 0.3