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7021 Aluminum vs. 5026 Aluminum

Both 7021 aluminum and 5026 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 5026 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.4
5.1 to 11
Fatigue Strength, MPa 150
94 to 140
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 270
150 to 180
Tensile Strength: Ultimate (UTS), MPa 460
260 to 320
Tensile Strength: Yield (Proof), MPa 390
120 to 250

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 200
210
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 510
510
Specific Heat Capacity, J/kg-K 870
890
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
31
Electrical Conductivity: Equal Weight (Specific), % IACS 120
99

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.9
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
15 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
100 to 440
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
49
Strength to Weight: Axial, points 44
26 to 32
Strength to Weight: Bending, points 45
33 to 37
Thermal Diffusivity, mm2/s 59
52
Thermal Shock Resistance, points 20
11 to 14

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
88.2 to 94.7
Chromium (Cr), % 0 to 0.050
0 to 0.3
Copper (Cu), % 0 to 0.25
0.1 to 0.8
Iron (Fe), % 0 to 0.4
0.2 to 1.0
Magnesium (Mg), % 1.2 to 1.8
3.9 to 4.9
Manganese (Mn), % 0 to 0.1
0.6 to 1.8
Silicon (Si), % 0 to 0.25
0.55 to 1.4
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 5.0 to 6.0
0 to 1.0
Zirconium (Zr), % 0.080 to 0.18
0 to 0.3
Residuals, % 0 to 0.15
0 to 0.15