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8021 Aluminum vs. Solder Alloy 137

8021 aluminum belongs to the aluminum alloys classification, while solder alloy 137 belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (5, 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 8021 aluminum and the bottom bar is solder alloy 137.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
24
Elongation at Break, % 2.3
19
Poisson's Ratio 0.33
0.42
Shear Modulus, GPa 26
8.3
Tensile Strength: Ultimate (UTS), MPa 160
34

Thermal Properties

Latent Heat of Fusion, J/g 400
33
Melting Completion (Liquidus), °C 650
270
Melting Onset (Solidus), °C 640
190
Specific Heat Capacity, J/kg-K 900
150
Thermal Conductivity, W/m-K 220
38
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 180
7.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
85
Density, g/cm3 2.8
10
Embodied Carbon, kg CO2/kg material 8.1
6.3
Embodied Energy, MJ/kg 150
100
Embodied Water, L/kg 1180
660

Common Calculations

Stiffness to Weight: Axial, points 14
1.3
Stiffness to Weight: Bending, points 49
9.2
Strength to Weight: Axial, points 16
0.9
Strength to Weight: Bending, points 23
2.2
Thermal Diffusivity, mm2/s 88
25
Thermal Shock Resistance, points 7.0
3.7

Alloy Composition

Aluminum (Al), % 98 to 98.8
0 to 0.0010
Antimony (Sb), % 0
0.5 to 3.0
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 0 to 0.050
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 1.2 to 1.7
0 to 0.020
Lead (Pb), % 0
75.9 to 80
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.15
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
19.5 to 20.5
Zinc (Zn), % 0
0 to 0.0010
Residuals, % 0 to 0.15
0