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6018 Aluminum vs. 6065 Aluminum

Both 6018 aluminum and 6065 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 6018 aluminum and the bottom bar is 6065 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 570
590
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 44
43
Electrical Conductivity: Equal Weight (Specific), % IACS 140
140

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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

Comparable Variants