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7021 Aluminum vs. 5182 Aluminum

Both 7021 aluminum and 5182 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is 5182 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
68
Elongation at Break, % 9.4
1.1 to 12
Fatigue Strength, MPa 150
100 to 130
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
25
Shear Strength, MPa 270
170 to 240
Tensile Strength: Ultimate (UTS), MPa 460
280 to 420
Tensile Strength: Yield (Proof), MPa 390
130 to 360

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 200
180
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
590
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
94

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.9
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
2.6 to 49
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
120 to 950
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
51
Strength to Weight: Axial, points 44
29 to 44
Strength to Weight: Bending, points 45
36 to 47
Thermal Diffusivity, mm2/s 59
53
Thermal Shock Resistance, points 20
12 to 19

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
93.2 to 95.8
Chromium (Cr), % 0 to 0.050
0 to 0.1
Copper (Cu), % 0 to 0.25
0 to 0.15
Iron (Fe), % 0 to 0.4
0 to 0.35
Magnesium (Mg), % 1.2 to 1.8
4.0 to 5.0
Manganese (Mn), % 0 to 0.1
0.2 to 0.5
Silicon (Si), % 0 to 0.25
0 to 0.2
Titanium (Ti), % 0 to 0.1
0 to 0.1
Zinc (Zn), % 5.0 to 6.0
0 to 0.25
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.15