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2018 Aluminum vs. 2618A Aluminum

Both 2018 aluminum and 2618A aluminum are aluminum alloys. They have a very high 97% of their average alloy composition in common. There are 30 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 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
72
Elongation at Break, % 9.6
4.5
Fatigue Strength, MPa 120
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Shear Strength, MPa 270
260
Tensile Strength: Ultimate (UTS), MPa 420
440
Tensile Strength: Yield (Proof), MPa 310
410

Thermal Properties

Latent Heat of Fusion, J/g 390
390
Maximum Temperature: Mechanical, °C 220
230
Melting Completion (Liquidus), °C 640
670
Melting Onset (Solidus), °C 510
560
Specific Heat Capacity, J/kg-K 870
880
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 22
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
37
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 3.1
3.0
Embodied Carbon, kg CO2/kg material 8.1
8.4
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
19
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
47
Strength to Weight: Axial, points 38
41
Strength to Weight: Bending, points 41
44
Thermal Diffusivity, mm2/s 57
59
Thermal Shock Resistance, points 19
19

Alloy Composition


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Aluminum (Al), % 89.7 to 94.4
91.5 to 95.2
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
1.8 to 2.7
Iron (Fe), % 0 to 1.0
0.9 to 1.4
Magnesium (Mg), % 0.45 to 0.9
1.2 to 1.8
Manganese (Mn), % 0 to 0.2
0 to 0.25
Nickel (Ni), % 1.7 to 2.3
0.8 to 1.4
Silicon (Si), % 0 to 0.9
0.15 to 0.25
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.15
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0 to 0.15
0 to 0.15