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5021 Aluminum vs. Solder Alloy 123

5021 aluminum belongs to the aluminum alloys classification, while solder alloy 123 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 5021 aluminum and the bottom bar is solder alloy 123.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
18
Elongation at Break, % 1.1 to 3.4
45
Poisson's Ratio 0.33
0.44
Shear Modulus, GPa 26
6.2
Tensile Strength: Ultimate (UTS), MPa 300 to 310
28

Thermal Properties

Latent Heat of Fusion, J/g 400
26
Melting Completion (Liquidus), °C 640
310
Melting Onset (Solidus), °C 590
300
Specific Heat Capacity, J/kg-K 900
130
Thermal Conductivity, W/m-K 140
23
Thermal Expansion, µm/m-K 23
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
75
Density, g/cm3 2.7
11
Embodied Carbon, kg CO2/kg material 8.6
4.5
Embodied Energy, MJ/kg 150
74
Embodied Water, L/kg 1180
500

Common Calculations

Stiffness to Weight: Axial, points 14
0.9
Stiffness to Weight: Bending, points 50
7.8
Strength to Weight: Axial, points 30 to 32
0.69
Strength to Weight: Bending, points 37
1.8
Thermal Diffusivity, mm2/s 57
16
Thermal Shock Resistance, points 13 to 14
3.8

Alloy Composition

Aluminum (Al), % 95.2 to 97.7
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0050
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.5
0 to 0.020
Lead (Pb), % 0
93.5 to 95.5
Magnesium (Mg), % 2.2 to 2.8
0
Manganese (Mn), % 0.1 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
4.5 to 5.5
Zinc (Zn), % 0 to 0.15
0 to 0.0010
Residuals, % 0 to 0.15
0