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7475 Aluminum vs. AWS E33-31

7475 aluminum belongs to the aluminum alloys classification, while AWS E33-31 belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, 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 7475 aluminum and the bottom bar is AWS E33-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
210
Elongation at Break, % 10 to 12
29
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 530 to 590
810

Thermal Properties

Latent Heat of Fusion, J/g 380
320
Melting Completion (Liquidus), °C 640
1380
Melting Onset (Solidus), °C 480
1330
Specific Heat Capacity, J/kg-K 870
480
Thermal Expansion, µm/m-K 23
14

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.2
6.0
Embodied Energy, MJ/kg 150
86
Embodied Water, L/kg 1130
260

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 49 to 55
28
Strength to Weight: Bending, points 48 to 52
24
Thermal Shock Resistance, points 23 to 26
19

Alloy Composition

Aluminum (Al), % 88.6 to 91.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.18 to 0.25
31 to 35
Copper (Cu), % 1.2 to 1.9
0.4 to 0.8
Iron (Fe), % 0 to 0.12
24.7 to 34.8
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.060
2.5 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.9
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.1 to 6.2
0
Residuals, % 0 to 0.15
0