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705.0 Aluminum vs. 8021 Aluminum

Both 705.0 aluminum and 8021 aluminum are aluminum alloys. They have a very high 96% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 705.0 aluminum and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 8.4 to 10
2.3
Fatigue Strength, MPa 63 to 98
61
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 240 to 260
160
Tensile Strength: Yield (Proof), MPa 130
130

Thermal Properties

Latent Heat of Fusion, J/g 390
400
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 610
640
Specific Heat Capacity, J/kg-K 890
900
Thermal Conductivity, W/m-K 140
220
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
56
Electrical Conductivity: Equal Weight (Specific), % IACS 110
180

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.8
2.8
Embodied Carbon, kg CO2/kg material 8.4
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1170
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
49
Strength to Weight: Axial, points 24 to 26
16
Strength to Weight: Bending, points 31 to 32
23
Thermal Diffusivity, mm2/s 55
88
Thermal Shock Resistance, points 11
7.0

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
98 to 98.8
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0 to 0.2
0 to 0.050
Iron (Fe), % 0 to 0.8
1.2 to 1.7
Magnesium (Mg), % 1.4 to 1.8
0
Manganese (Mn), % 0 to 0.6
0
Silicon (Si), % 0 to 0.2
0 to 0.15
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 3.3
0
Residuals, % 0
0 to 0.15