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3105 Aluminum vs. 2218 Aluminum

Both 3105 aluminum and 2218 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 3105 aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 29 to 67
95 to 110
Elastic (Young's, Tensile) Modulus, GPa 69
73
Elongation at Break, % 1.1 to 20
6.8 to 10
Fatigue Strength, MPa 39 to 95
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 77 to 140
210 to 250
Tensile Strength: Ultimate (UTS), MPa 120 to 240
330 to 430
Tensile Strength: Yield (Proof), MPa 46 to 220
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 400
390
Maximum Temperature: Mechanical, °C 180
220
Melting Completion (Liquidus), °C 660
640
Melting Onset (Solidus), °C 640
510
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 170
140
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
37
Electrical Conductivity: Equal Weight (Specific), % IACS 140
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.8
3.1
Embodied Carbon, kg CO2/kg material 8.2
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
450 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
45
Strength to Weight: Axial, points 12 to 24
30 to 39
Strength to Weight: Bending, points 20 to 31
34 to 41
Thermal Diffusivity, mm2/s 68
52
Thermal Shock Resistance, points 5.2 to 11
15 to 19

Alloy Composition

Aluminum (Al), % 96 to 99.5
88.8 to 93.6
Chromium (Cr), % 0 to 0.2
0 to 0.1
Copper (Cu), % 0 to 0.3
3.5 to 4.5
Iron (Fe), % 0 to 0.7
0 to 1.0
Magnesium (Mg), % 0.2 to 0.8
1.2 to 1.8
Manganese (Mn), % 0.3 to 0.8
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0 to 0.6
0 to 0.9
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0 to 0.25
Residuals, % 0
0 to 0.15