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7021 Aluminum vs. 712.0 Aluminum

Both 7021 aluminum and 712.0 aluminum are aluminum alloys. They have a very high 99% of their average alloy composition in common. There are 30 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 7021 aluminum and the bottom bar is 712.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.4
4.5 to 4.7
Fatigue Strength, MPa 150
140 to 180
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
27
Shear Strength, MPa 270
180
Tensile Strength: Ultimate (UTS), MPa 460
250 to 260
Tensile Strength: Yield (Proof), MPa 390
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 380
380
Maximum Temperature: Mechanical, °C 200
190
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
610
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 150
160
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
40
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
11
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
240 to 270
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
46
Strength to Weight: Axial, points 44
24 to 25
Strength to Weight: Bending, points 45
30 to 31
Thermal Diffusivity, mm2/s 59
62
Thermal Shock Resistance, points 20
11

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
90.7 to 94
Chromium (Cr), % 0 to 0.050
0.4 to 0.6
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 0 to 0.4
0 to 0.5
Magnesium (Mg), % 1.2 to 1.8
0.5 to 0.65
Manganese (Mn), % 0 to 0.1
0 to 0.1
Silicon (Si), % 0 to 0.25
0 to 0.3
Titanium (Ti), % 0 to 0.1
0.15 to 0.25
Zinc (Zn), % 5.0 to 6.0
5.0 to 6.5
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.2