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7050 Aluminum vs. 8021 Aluminum

Both 7050 aluminum and 8021 aluminum are aluminum alloys. They have 90% 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 7050 aluminum and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 2.2 to 12
2.3
Fatigue Strength, MPa 130 to 210
61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 490 to 570
160
Tensile Strength: Yield (Proof), MPa 390 to 500
130

Thermal Properties

Latent Heat of Fusion, J/g 370
400
Maximum Temperature: Mechanical, °C 190
170
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 490
640
Specific Heat Capacity, J/kg-K 860
900
Thermal Conductivity, W/m-K 140
220
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
56
Electrical Conductivity: Equal Weight (Specific), % IACS 100
180

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 3.1
2.8
Embodied Carbon, kg CO2/kg material 8.2
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1120
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 55
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 1110 to 1760
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
49
Strength to Weight: Axial, points 45 to 51
16
Strength to Weight: Bending, points 45 to 50
23
Thermal Diffusivity, mm2/s 54
88
Thermal Shock Resistance, points 21 to 25
7.0

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
98 to 98.8
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 2.0 to 2.6
0 to 0.050
Iron (Fe), % 0 to 0.15
1.2 to 1.7
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 0 to 0.12
0 to 0.15
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.7 to 6.7
0
Zirconium (Zr), % 0.080 to 0.15
0
Residuals, % 0
0 to 0.15