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6081 Aluminum vs. 7475 Aluminum

Both 6081 aluminum and 7475 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 6081 aluminum and the bottom bar is 7475 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.0
10 to 12
Fatigue Strength, MPa 110
190 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 180
320 to 350
Tensile Strength: Ultimate (UTS), MPa 310
530 to 590
Tensile Strength: Yield (Proof), MPa 270
440 to 520

Thermal Properties

Latent Heat of Fusion, J/g 410
380
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
480
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 180
140 to 160
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
33 to 42
Electrical Conductivity: Equal Weight (Specific), % IACS 160
98 to 120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
53 to 68
Resilience: Unit (Modulus of Resilience), kJ/m3 540
1390 to 1920
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
46
Strength to Weight: Axial, points 32
49 to 55
Strength to Weight: Bending, points 37
48 to 52
Thermal Diffusivity, mm2/s 74
53 to 63
Thermal Shock Resistance, points 14
23 to 26

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
88.6 to 91.6
Chromium (Cr), % 0 to 0.1
0.18 to 0.25
Copper (Cu), % 0 to 0.1
1.2 to 1.9
Iron (Fe), % 0 to 0.5
0 to 0.12
Magnesium (Mg), % 0.6 to 1.0
1.9 to 2.6
Manganese (Mn), % 0.1 to 0.45
0 to 0.060
Silicon (Si), % 0.7 to 1.1
0 to 0.1
Titanium (Ti), % 0 to 0.15
0 to 0.060
Zinc (Zn), % 0 to 0.2
5.1 to 6.2
Residuals, % 0
0 to 0.15