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1070 Aluminum vs. 8021 Aluminum

Both 1070 aluminum and 8021 aluminum are aluminum alloys. They have a very high 99% 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 1070 aluminum and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
70
Elongation at Break, % 4.5 to 39
2.3
Fatigue Strength, MPa 22 to 49
61
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 73 to 140
160
Tensile Strength: Yield (Proof), MPa 17 to 120
130

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 640
640
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 230
220
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
56
Electrical Conductivity: Equal Weight (Specific), % IACS 200
180

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.7
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 1200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.8 to 21
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 110
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
49
Strength to Weight: Axial, points 7.5 to 14
16
Strength to Weight: Bending, points 14 to 22
23
Thermal Diffusivity, mm2/s 94
88
Thermal Shock Resistance, points 3.3 to 6.1
7.0

Alloy Composition

Aluminum (Al), % 99.7 to 100
98 to 98.8
Copper (Cu), % 0 to 0.040
0 to 0.050
Iron (Fe), % 0 to 0.25
1.2 to 1.7
Magnesium (Mg), % 0 to 0.030
0
Manganese (Mn), % 0 to 0.030
0
Silicon (Si), % 0 to 0.2
0 to 0.15
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.040
0
Residuals, % 0 to 0.030
0 to 0.15