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308.0 Aluminum vs. 8021 Aluminum

Both 308.0 aluminum and 8021 aluminum are aluminum alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 308.0 aluminum and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
70
Elongation at Break, % 2.0
2.3
Fatigue Strength, MPa 89
61
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Tensile Strength: Ultimate (UTS), MPa 190
160
Tensile Strength: Yield (Proof), MPa 110
130

Thermal Properties

Latent Heat of Fusion, J/g 470
400
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 620
650
Melting Onset (Solidus), °C 540
640
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 140
220
Thermal Expansion, µm/m-K 20
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
56
Electrical Conductivity: Equal Weight (Specific), % IACS 110
180

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 7.7
8.1
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1080
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.3
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 83
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
49
Strength to Weight: Axial, points 18
16
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 55
88
Thermal Shock Resistance, points 9.2
7.0

Alloy Composition

Aluminum (Al), % 85.7 to 91
98 to 98.8
Copper (Cu), % 4.0 to 5.0
0 to 0.050
Iron (Fe), % 0 to 1.0
1.2 to 1.7
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0
Silicon (Si), % 5.0 to 6.0
0 to 0.15
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0
0 to 0.15