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7020 Aluminum vs. Solder Alloy 124

7020 aluminum belongs to the aluminum alloys classification, while solder alloy 124 belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 7020 aluminum and the bottom bar is solder alloy 124.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
17
Elongation at Break, % 8.4 to 14
46
Poisson's Ratio 0.33
0.44
Shear Modulus, GPa 26
5.8
Tensile Strength: Ultimate (UTS), MPa 190 to 390
27

Thermal Properties

Latent Heat of Fusion, J/g 380
24
Melting Completion (Liquidus), °C 650
330
Melting Onset (Solidus), °C 610
320
Specific Heat Capacity, J/kg-K 880
130
Thermal Conductivity, W/m-K 150
22
Thermal Expansion, µm/m-K 23
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
9.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
70
Density, g/cm3 2.9
11
Embodied Carbon, kg CO2/kg material 8.3
4.1
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1150
470

Common Calculations

Stiffness to Weight: Axial, points 13
0.83
Stiffness to Weight: Bending, points 47
7.6
Strength to Weight: Axial, points 18 to 37
0.65
Strength to Weight: Bending, points 25 to 41
1.8
Thermal Diffusivity, mm2/s 59
15
Thermal Shock Resistance, points 8.3 to 17
3.9

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0 to 0.0010
Antimony (Sb), % 0
0 to 0.12
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.4
0 to 0.020
Lead (Pb), % 0
97.2 to 98.2
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.35
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
1.8 to 2.2
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0 to 0.0010
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0 to 0.15
0