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7050 Aluminum vs. AWS E33-31

7050 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 7050 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, % 2.2 to 12
29
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 490 to 570
810

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Melting Completion (Liquidus), °C 630
1380
Melting Onset (Solidus), °C 490
1330
Specific Heat Capacity, J/kg-K 860
480
Thermal Expansion, µm/m-K 24
14

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 3.1
7.9
Embodied Carbon, kg CO2/kg material 8.2
6.0
Embodied Energy, MJ/kg 150
86
Embodied Water, L/kg 1120
260

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 45 to 51
28
Strength to Weight: Bending, points 45 to 50
24
Thermal Shock Resistance, points 21 to 25
19

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.040
31 to 35
Copper (Cu), % 2.0 to 2.6
0.4 to 0.8
Iron (Fe), % 0 to 0.15
24.7 to 34.8
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.1
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 0.12
0 to 0.9
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.7 to 6.7
0
Zirconium (Zr), % 0.080 to 0.15
0
Residuals, % 0 to 0.15
0