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AWS E385 vs. 2018 Aluminum

AWS E385 belongs to the iron alloys classification, while 2018 aluminum belongs to the aluminum 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 AWS E385 and the bottom bar is 2018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 34
9.6
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
27
Tensile Strength: Ultimate (UTS), MPa 580
420

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1390
510
Specific Heat Capacity, J/kg-K 460
870
Thermal Conductivity, W/m-K 14
150
Thermal Expansion, µm/m-K 14
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
40
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
120

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 20
38
Strength to Weight: Bending, points 19
41
Thermal Diffusivity, mm2/s 3.6
57
Thermal Shock Resistance, points 15
19

Alloy Composition


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Aluminum (Al), % 0
89.7 to 94.4
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 21.5
0 to 0.1
Copper (Cu), % 1.2 to 2.0
3.5 to 4.5
Iron (Fe), % 41.8 to 50.1
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.9
Manganese (Mn), % 1.0 to 2.5
0 to 0.2
Molybdenum (Mo), % 4.2 to 5.2
0
Nickel (Ni), % 24 to 26
1.7 to 2.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.9
0 to 0.9
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15