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2018 Aluminum vs. AWS E100C-K3

2018 aluminum belongs to the aluminum alloys classification, while AWS E100C-K3 belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 2018 aluminum and the bottom bar is AWS E100C-K3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 9.6
18
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 420
770
Tensile Strength: Yield (Proof), MPa 310
700

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 510
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
48
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.4
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.7
Embodied Energy, MJ/kg 150
23
Embodied Water, L/kg 1130
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
130
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 41
24
Thermal Diffusivity, mm2/s 57
13
Thermal Shock Resistance, points 19
23

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.1
0 to 0.15
Copper (Cu), % 3.5 to 4.5
0 to 0.35
Iron (Fe), % 0 to 1.0
92.6 to 98.5
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
0.75 to 2.3
Molybdenum (Mo), % 0
0.25 to 0.65
Nickel (Ni), % 1.7 to 2.3
0.5 to 2.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.9
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Vanadium (V), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.5