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7020 Aluminum vs. 7108A Aluminum

Both 7020 aluminum and 7108A aluminum are aluminum alloys. Their average alloy composition is basically identical. 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 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
69
Elongation at Break, % 8.4 to 14
11 to 13
Fatigue Strength, MPa 110 to 130
120 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 110 to 230
210
Tensile Strength: Ultimate (UTS), MPa 190 to 390
350
Tensile Strength: Yield (Proof), MPa 120 to 310
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 380
380
Maximum Temperature: Mechanical, °C 210
210
Melting Completion (Liquidus), °C 650
630
Melting Onset (Solidus), °C 610
520
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
36
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.9
2.9
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
610 to 640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
47
Strength to Weight: Axial, points 18 to 37
33 to 34
Strength to Weight: Bending, points 25 to 41
38
Thermal Diffusivity, mm2/s 59
59
Thermal Shock Resistance, points 8.3 to 17
15 to 16

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
91.6 to 94.4
Chromium (Cr), % 0.1 to 0.35
0 to 0.040
Copper (Cu), % 0 to 0.2
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 0.4
0 to 0.3
Magnesium (Mg), % 1.0 to 1.4
0.7 to 1.5
Manganese (Mn), % 0.050 to 0.5
0 to 0.050
Silicon (Si), % 0 to 0.35
0 to 0.2
Titanium (Ti), % 0 to 0.25
0 to 0.030
Zinc (Zn), % 4.0 to 5.0
4.8 to 5.8
Zirconium (Zr), % 0.080 to 0.25
0.15 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants