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5456 Aluminum vs. 8021 Aluminum

Both 5456 aluminum and 8021 aluminum are aluminum alloys. They have a moderately high 94% 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 5456 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, % 11 to 18
2.3
Fatigue Strength, MPa 130 to 210
61
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 320 to 340
160
Tensile Strength: Yield (Proof), MPa 150 to 250
130

Thermal Properties

Latent Heat of Fusion, J/g 390
400
Maximum Temperature: Mechanical, °C 190
170
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 570
640
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 120
220
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
56
Electrical Conductivity: Equal Weight (Specific), % IACS 97
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 9.0
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1170
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 33 to 46
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 470
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
49
Strength to Weight: Axial, points 33 to 35
16
Strength to Weight: Bending, points 38 to 40
23
Thermal Diffusivity, mm2/s 48
88
Thermal Shock Resistance, points 14 to 15
7.0

Alloy Composition

Aluminum (Al), % 92 to 94.8
98 to 98.8
Chromium (Cr), % 0.050 to 0.2
0
Copper (Cu), % 0 to 0.1
0 to 0.050
Iron (Fe), % 0 to 0.4
1.2 to 1.7
Magnesium (Mg), % 4.7 to 5.5
0
Manganese (Mn), % 0.5 to 1.0
0
Silicon (Si), % 0 to 0.25
0 to 0.15
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.15