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2218 Aluminum vs. AWS E385

2218 aluminum belongs to the aluminum alloys classification, while AWS E385 belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2218 aluminum and the bottom bar is AWS E385.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 6.8 to 10
34
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 330 to 430
580

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 510
1390
Specific Heat Capacity, J/kg-K 870
460
Thermal Conductivity, W/m-K 140
14
Thermal Expansion, µm/m-K 22
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
31
Density, g/cm3 3.1
8.1
Embodied Carbon, kg CO2/kg material 8.2
5.8
Embodied Energy, MJ/kg 150
79
Embodied Water, L/kg 1130
200

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 30 to 39
20
Strength to Weight: Bending, points 34 to 41
19
Thermal Diffusivity, mm2/s 52
3.6
Thermal Shock Resistance, points 15 to 19
15

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
19.5 to 21.5
Copper (Cu), % 3.5 to 4.5
1.2 to 2.0
Iron (Fe), % 0 to 1.0
41.8 to 50.1
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
1.0 to 2.5
Molybdenum (Mo), % 0
4.2 to 5.2
Nickel (Ni), % 1.7 to 2.3
24 to 26
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.9
0 to 0.9
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0