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7050 Aluminum vs. 6081 Aluminum

Both 7050 aluminum and 6081 aluminum are aluminum alloys. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is 7050 aluminum and the bottom bar is 6081 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
69
Elongation at Break, % 2.2 to 12
9.0
Fatigue Strength, MPa 130 to 210
110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 280 to 330
180
Tensile Strength: Ultimate (UTS), MPa 490 to 570
310
Tensile Strength: Yield (Proof), MPa 390 to 500
270

Thermal Properties

Latent Heat of Fusion, J/g 370
410
Maximum Temperature: Mechanical, °C 190
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 490
610
Specific Heat Capacity, J/kg-K 860
900
Thermal Conductivity, W/m-K 140
180
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
47
Electrical Conductivity: Equal Weight (Specific), % IACS 100
160

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 3.1
2.7
Embodied Carbon, kg CO2/kg material 8.2
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1120
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 55
27
Resilience: Unit (Modulus of Resilience), kJ/m3 1110 to 1760
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
50
Strength to Weight: Axial, points 45 to 51
32
Strength to Weight: Bending, points 45 to 50
37
Thermal Diffusivity, mm2/s 54
74
Thermal Shock Resistance, points 21 to 25
14

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
96.3 to 98.6
Chromium (Cr), % 0 to 0.040
0 to 0.1
Copper (Cu), % 2.0 to 2.6
0 to 0.1
Iron (Fe), % 0 to 0.15
0 to 0.5
Magnesium (Mg), % 1.9 to 2.6
0.6 to 1.0
Manganese (Mn), % 0 to 0.1
0.1 to 0.45
Silicon (Si), % 0 to 0.12
0.7 to 1.1
Titanium (Ti), % 0 to 0.060
0 to 0.15
Zinc (Zn), % 5.7 to 6.7
0 to 0.2
Zirconium (Zr), % 0.080 to 0.15
0
Residuals, % 0
0 to 0.15