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8021 Aluminum vs. 308.0 Aluminum

Both 8021 aluminum and 308.0 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 8021 aluminum and the bottom bar is 308.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

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
7.7
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1180
1080

Common Calculations

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

Alloy Composition

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