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7129 Aluminum vs. 6081 Aluminum

Both 7129 Aluminum and 6081 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is 6081 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 9.0 to 9.1
9.0
Fatigue Strength, MPa 150 to 190
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 250 to 260
180
Tensile Strength: Ultimate (UTS), MPa 430
310
Tensile Strength: Yield (Proof), MPa 380 to 390
270

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
610
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 150
180
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
47
Electrical Conductivity: Equal Weight (Specific), % IACS 120
160

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
27
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 41
32
Strength to Weight: Bending, points 43 to 44
37
Thermal Diffusivity, mm2/s 58
74
Thermal Shock Resistance, points 19
14

Alloy Composition

Aluminum (Al), % 91 to 94
96.3 to 98.6
Chromium (Cr), % 0 to 0.1
0 to 0.1
Copper (Cu), % 0.5 to 0.9
0 to 0.1
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.5
Magnesium (Mg), % 1.3 to 2.0
0.6 to 1.0
Manganese (Mn), % 0 to 0.1
0.1 to 0.45
Silicon (Si), % 0 to 0.15
0.7 to 1.1
Titanium (Ti), % 0 to 0.050
0 to 0.15
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0 to 0.2
Residuals, % 0
0 to 0.15