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2018 Aluminum vs. 3105 Aluminum

Both 2018 aluminum and 3105 aluminum are aluminum alloys. They have a moderately high 94% 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 2018 aluminum and the bottom bar is 3105 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
29 to 67
Elastic (Young's, Tensile) Modulus, GPa 73
69
Elongation at Break, % 9.6
1.1 to 20
Fatigue Strength, MPa 120
39 to 95
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Shear Strength, MPa 270
77 to 140
Tensile Strength: Ultimate (UTS), MPa 420
120 to 240
Tensile Strength: Yield (Proof), MPa 310
46 to 220

Thermal Properties

Latent Heat of Fusion, J/g 390
400
Maximum Temperature: Mechanical, °C 220
180
Melting Completion (Liquidus), °C 640
660
Melting Onset (Solidus), °C 510
640
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
170
Thermal Expansion, µm/m-K 22
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
44
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 3.1
2.8
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
2.6 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 670
15 to 340
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
50
Strength to Weight: Axial, points 38
12 to 24
Strength to Weight: Bending, points 41
20 to 31
Thermal Diffusivity, mm2/s 57
68
Thermal Shock Resistance, points 19
5.2 to 11

Alloy Composition


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Aluminum (Al), % 89.7 to 94.4
96 to 99.5
Chromium (Cr), % 0 to 0.1
0 to 0.2
Copper (Cu), % 3.5 to 4.5
0 to 0.3
Iron (Fe), % 0 to 1.0
0 to 0.7
Magnesium (Mg), % 0.45 to 0.9
0.2 to 0.8
Manganese (Mn), % 0 to 0.2
0.3 to 0.8
Nickel (Ni), % 1.7 to 2.3
0
Silicon (Si), % 0 to 0.9
0 to 0.6
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.25
0 to 0.4
Residuals, % 0 to 0.15
0 to 0.15