6081 Aluminum vs. 7129 Aluminum
Both 6081 aluminum and 7129 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 6081 aluminum and the bottom bar is 7129 Aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 69 | |
69 |
Elongation at Break, % | 9.0 | |
9.0 to 9.1 |
Fatigue Strength, MPa | 110 | |
150 to 190 |
Poisson's Ratio | 0.33 | |
0.33 |
Shear Modulus, GPa | 26 | |
26 |
Shear Strength, MPa | 180 | |
250 to 260 |
Tensile Strength: Ultimate (UTS), MPa | 310 | |
430 |
Tensile Strength: Yield (Proof), MPa | 270 | |
380 to 390 |
Thermal Properties
Latent Heat of Fusion, J/g | 410 | |
380 |
Maximum Temperature: Mechanical, °C | 160 | |
180 |
Melting Completion (Liquidus), °C | 640 | |
630 |
Melting Onset (Solidus), °C | 610 | |
510 |
Specific Heat Capacity, J/kg-K | 900 | |
880 |
Thermal Conductivity, W/m-K | 180 | |
150 |
Thermal Expansion, µm/m-K | 23 | |
24 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 47 | |
40 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 160 | |
120 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 9.5 | |
9.5 |
Density, g/cm3 | 2.7 | |
2.9 |
Embodied Carbon, kg CO2/kg material | 8.3 | |
8.3 |
Embodied Energy, MJ/kg | 150 | |
150 |
Embodied Water, L/kg | 1180 | |
1150 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 27 | |
37 to 38 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 540 | |
1050 to 1090 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 50 | |
47 |
Strength to Weight: Axial, points | 32 | |
41 |
Strength to Weight: Bending, points | 37 | |
43 to 44 |
Thermal Diffusivity, mm2/s | 74 | |
58 |
Thermal Shock Resistance, points | 14 | |
19 |
Alloy Composition
Aluminum (Al), % | 96.3 to 98.6 | |
91 to 94 |
Chromium (Cr), % | 0 to 0.1 | |
0 to 0.1 |
Copper (Cu), % | 0 to 0.1 | |
0.5 to 0.9 |
Gallium (Ga), % | 0 | |
0 to 0.030 |
Iron (Fe), % | 0 to 0.5 | |
0 to 0.3 |
Magnesium (Mg), % | 0.6 to 1.0 | |
1.3 to 2.0 |
Manganese (Mn), % | 0.1 to 0.45 | |
0 to 0.1 |
Silicon (Si), % | 0.7 to 1.1 | |
0 to 0.15 |
Titanium (Ti), % | 0 to 0.15 | |
0 to 0.050 |
Vanadium (V), % | 0 | |
0 to 0.050 |
Zinc (Zn), % | 0 to 0.2 | |
4.2 to 5.2 |
Residuals, % | 0 | |
0 to 0.15 |