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8021 Aluminum vs. 7022 Aluminum

Both 8021 aluminum and 7022 aluminum are aluminum alloys. They have a moderately high 91% of their average alloy composition in common. There are 29 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 8021 aluminum and the bottom bar is 7022 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 2.3
6.3 to 8.0
Fatigue Strength, MPa 61
140 to 170
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 160
490 to 540
Tensile Strength: Yield (Proof), MPa 130
390 to 460

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 170
200
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 640
480
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 220
140
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
21
Electrical Conductivity: Equal Weight (Specific), % IACS 180
65

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 2.8
2.9
Embodied Carbon, kg CO2/kg material 8.1
8.5
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.4
29 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 130
1100 to 1500
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
47
Strength to Weight: Axial, points 16
47 to 51
Strength to Weight: Bending, points 23
47 to 50
Thermal Diffusivity, mm2/s 88
54
Thermal Shock Resistance, points 7.0
21 to 23

Alloy Composition

Aluminum (Al), % 98 to 98.8
87.9 to 92.4
Chromium (Cr), % 0
0.1 to 0.3
Copper (Cu), % 0 to 0.050
0.5 to 1.0
Iron (Fe), % 1.2 to 1.7
0 to 0.5
Magnesium (Mg), % 0
2.6 to 3.7
Manganese (Mn), % 0
0.1 to 0.4
Silicon (Si), % 0 to 0.15
0 to 0.5
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
4.3 to 5.2
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15