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6081 Aluminum vs. 3203 Aluminum

Both 6081 aluminum and 3203 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 3203 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.0
4.5 to 29
Fatigue Strength, MPa 110
46 to 92
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 180
72 to 120
Tensile Strength: Ultimate (UTS), MPa 310
110 to 200
Tensile Strength: Yield (Proof), MPa 270
39 to 190

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 610
620
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 180
170
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
43
Electrical Conductivity: Equal Weight (Specific), % IACS 160
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.7
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
8.0 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 540
11 to 250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 32
11 to 20
Strength to Weight: Bending, points 37
19 to 28
Thermal Diffusivity, mm2/s 74
70
Thermal Shock Resistance, points 14
4.9 to 8.8

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
96.9 to 99
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.1
0 to 0.050
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
1.0 to 1.5
Silicon (Si), % 0.7 to 1.1
0 to 0.6
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.2
0 to 0.1
Residuals, % 0
0 to 0.15