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8021 Aluminum vs. 712.0 Aluminum

Both 8021 aluminum and 712.0 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 8021 aluminum and the bottom bar is 712.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 2.3
4.5 to 4.7
Fatigue Strength, MPa 61
140 to 180
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
27
Tensile Strength: Ultimate (UTS), MPa 160
250 to 260
Tensile Strength: Yield (Proof), MPa 130
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 170
190
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 640
610
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 220
160
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
40
Electrical Conductivity: Equal Weight (Specific), % IACS 180
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.5
Density, g/cm3 2.8
3.0
Embodied Carbon, kg CO2/kg material 8.1
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.4
11
Resilience: Unit (Modulus of Resilience), kJ/m3 130
240 to 270
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
46
Strength to Weight: Axial, points 16
24 to 25
Strength to Weight: Bending, points 23
30 to 31
Thermal Diffusivity, mm2/s 88
62
Thermal Shock Resistance, points 7.0
11

Alloy Composition

Aluminum (Al), % 98 to 98.8
90.7 to 94
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 1.2 to 1.7
0 to 0.5
Magnesium (Mg), % 0
0.5 to 0.65
Manganese (Mn), % 0
0 to 0.1
Silicon (Si), % 0 to 0.15
0 to 0.3
Titanium (Ti), % 0
0.15 to 0.25
Zinc (Zn), % 0
5.0 to 6.5
Residuals, % 0
0 to 0.2