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7021 Aluminum vs. 518.0 Aluminum

Both 7021 aluminum and 518.0 aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is 518.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
67
Elongation at Break, % 9.4
5.0
Fatigue Strength, MPa 150
140
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
25
Shear Strength, MPa 270
200
Tensile Strength: Ultimate (UTS), MPa 460
310
Tensile Strength: Yield (Proof), MPa 390
190

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 630
620
Melting Onset (Solidus), °C 510
560
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
98
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
24
Electrical Conductivity: Equal Weight (Specific), % IACS 120
81

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
9.4
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
14
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
270
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
51
Strength to Weight: Axial, points 44
32
Strength to Weight: Bending, points 45
38
Thermal Diffusivity, mm2/s 59
40
Thermal Shock Resistance, points 20
14

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
88.1 to 92.5
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 0 to 0.4
0 to 1.8
Magnesium (Mg), % 1.2 to 1.8
7.5 to 8.5
Manganese (Mn), % 0 to 0.1
0 to 0.35
Nickel (Ni), % 0
0 to 0.15
Silicon (Si), % 0 to 0.25
0 to 0.35
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.0 to 6.0
0 to 0.15
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.25