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6065 Aluminum vs. 6018 Aluminum

Both 6065 aluminum and 6018 aluminum are aluminum alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is 6065 aluminum and the bottom bar is 6018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
69
Elongation at Break, % 4.5 to 11
9.0 to 9.1
Fatigue Strength, MPa 96 to 110
85 to 89
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 190 to 230
170 to 180
Tensile Strength: Ultimate (UTS), MPa 310 to 400
290 to 300
Tensile Strength: Yield (Proof), MPa 270 to 380
220 to 230

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 590
570
Specific Heat Capacity, J/kg-K 890
890
Thermal Conductivity, W/m-K 170
170
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
44
Electrical Conductivity: Equal Weight (Specific), % IACS 140
140

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 2.8
2.9
Embodied Carbon, kg CO2/kg material 8.4
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 34
24 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 1040
360 to 380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
48
Strength to Weight: Axial, points 31 to 40
28 to 29
Strength to Weight: Bending, points 36 to 43
34 to 35
Thermal Diffusivity, mm2/s 67
65
Thermal Shock Resistance, points 14 to 18
13

Alloy Composition

Aluminum (Al), % 94.4 to 98.2
93.1 to 97.8
Bismuth (Bi), % 0.5 to 1.5
0.4 to 0.7
Chromium (Cr), % 0 to 0.15
0 to 0.1
Copper (Cu), % 0.15 to 0.4
0.15 to 0.4
Iron (Fe), % 0 to 0.7
0 to 0.7
Lead (Pb), % 0 to 0.050
0.4 to 1.2
Magnesium (Mg), % 0.8 to 1.2
0.6 to 1.2
Manganese (Mn), % 0 to 0.15
0.3 to 0.8
Silicon (Si), % 0.4 to 0.8
0.5 to 1.2
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.3
Zirconium (Zr), % 0 to 0.15
0
Residuals, % 0
0 to 0.15

Comparable Variants