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7020 Aluminum vs. AZ80A Magnesium

7020 aluminum belongs to the aluminum alloys classification, while AZ80A magnesium belongs to the magnesium 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 7020 aluminum and the bottom bar is AZ80A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
46
Elongation at Break, % 8.4 to 14
3.9 to 8.5
Fatigue Strength, MPa 110 to 130
140 to 170
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 110 to 230
160 to 190
Tensile Strength: Ultimate (UTS), MPa 190 to 390
320 to 340
Tensile Strength: Yield (Proof), MPa 120 to 310
210 to 230

Thermal Properties

Latent Heat of Fusion, J/g 380
350
Maximum Temperature: Mechanical, °C 210
130
Melting Completion (Liquidus), °C 650
600
Melting Onset (Solidus), °C 610
490
Specific Heat Capacity, J/kg-K 880
990
Thermal Conductivity, W/m-K 150
77
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
11
Electrical Conductivity: Equal Weight (Specific), % IACS 120
59

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.9
1.7
Embodied Carbon, kg CO2/kg material 8.3
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
12 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
500 to 600
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
69
Strength to Weight: Axial, points 18 to 37
51 to 55
Strength to Weight: Bending, points 25 to 41
60 to 63
Thermal Diffusivity, mm2/s 59
45
Thermal Shock Resistance, points 8.3 to 17
19 to 20

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
7.8 to 9.2
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0 to 0.050
Iron (Fe), % 0 to 0.4
0 to 0.0050
Magnesium (Mg), % 1.0 to 1.4
89 to 91.9
Manganese (Mn), % 0.050 to 0.5
0.12 to 0.5
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.35
0 to 0.1
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0.2 to 0.8
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.3

Comparable Variants