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6061 Aluminum vs. 7075 Aluminum

Both 6061 aluminum and 7075 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 6061 aluminum and the bottom bar is 7075 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 3.4 to 20
1.8 to 12
Fatigue Strength, MPa 58 to 110
110 to 190
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 84 to 210
150 to 340
Tensile Strength: Ultimate (UTS), MPa 130 to 410
240 to 590
Tensile Strength: Yield (Proof), MPa 76 to 370
120 to 510

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 170
200
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 580
480
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 170
130
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
33
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Calomel Potential, mV -740
-750
Density, g/cm3 2.7
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.8 to 81
7.8 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 42 to 1000
110 to 1870
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
46
Strength to Weight: Axial, points 13 to 42
22 to 54
Strength to Weight: Bending, points 21 to 45
28 to 52
Thermal Diffusivity, mm2/s 68
50
Thermal Shock Resistance, points 5.7 to 18
10 to 25

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
86.9 to 91.4
Chromium (Cr), % 0.040 to 0.35
0.18 to 0.28
Copper (Cu), % 0.15 to 0.4
1.2 to 2.0
Iron (Fe), % 0 to 0.7
0 to 0.5
Magnesium (Mg), % 0.8 to 1.2
2.1 to 2.9
Manganese (Mn), % 0 to 0.15
0 to 0.3
Silicon (Si), % 0.4 to 0.8
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0 to 0.25
5.1 to 6.1
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0 to 0.15
0 to 0.15

Comparable Variants