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6081 Aluminum vs. 3102 Aluminum

Both 6081 aluminum and 3102 aluminum are aluminum alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is 6081 aluminum and the bottom bar is 3102 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 9.0
23 to 28
Fatigue Strength, MPa 110
31 to 34
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 180
58 to 65
Tensile Strength: Ultimate (UTS), MPa 310
92 to 100
Tensile Strength: Yield (Proof), MPa 270
28 to 34

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
640
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 180
230
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
56
Electrical Conductivity: Equal Weight (Specific), % IACS 160
190

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.7
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
16 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 540
5.8 to 8.3
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 32
9.4 to 10
Strength to Weight: Bending, points 37
17 to 18
Thermal Diffusivity, mm2/s 74
92
Thermal Shock Resistance, points 14
4.1 to 4.4

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
97.9 to 99.95
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.5
0 to 0.7
Magnesium (Mg), % 0.6 to 1.0
0
Manganese (Mn), % 0.1 to 0.45
0.050 to 0.4
Silicon (Si), % 0.7 to 1.1
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.1
Zinc (Zn), % 0 to 0.2
0 to 0.3
Residuals, % 0
0 to 0.15