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Solder Alloy 121 vs. 5383 Aluminum

Solder alloy 121 belongs to the otherwise unclassified metals classification, while 5383 aluminum belongs to the aluminum alloys. There are 25 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 solder alloy 121 and the bottom bar is 5383 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 11
85 to 110
Elastic (Young's, Tensile) Modulus, GPa 21
68
Elongation at Break, % 25
6.7 to 15
Poisson's Ratio 0.43
0.33
Shear Modulus, GPa 7.5
26
Tensile Strength: Ultimate (UTS), MPa 32
310 to 370

Thermal Properties

Latent Heat of Fusion, J/g 29
390
Melting Completion (Liquidus), °C 290
650
Melting Onset (Solidus), °C 230
540
Specific Heat Capacity, J/kg-K 140
900
Thermal Conductivity, W/m-K 31
130
Thermal Expansion, µm/m-K 28
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
29
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
97

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.5
Density, g/cm3 11
2.7
Embodied Carbon, kg CO2/kg material 5.6
9.0
Embodied Energy, MJ/kg 93
160
Embodied Water, L/kg 580
1170

Common Calculations

Stiffness to Weight: Axial, points 1.1
14
Stiffness to Weight: Bending, points 8.6
50
Strength to Weight: Axial, points 0.84
32 to 38
Strength to Weight: Bending, points 2.1
38 to 42
Thermal Diffusivity, mm2/s 20
51
Thermal Shock Resistance, points 3.9
14 to 16

Alloy Composition

Aluminum (Al), % 0 to 0.0010
92 to 95.3
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.25
0
Cadmium (Cd), % 0 to 0.0050
0
Chromium (Cr), % 0
0 to 0.25
Copper (Cu), % 0 to 0.080
0 to 0.2
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.25
Lead (Pb), % 83.4 to 85.5
0
Magnesium (Mg), % 0
4.0 to 5.2
Manganese (Mn), % 0
0.7 to 1.0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.25
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 14.5 to 15.5
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0 to 0.0010
0 to 0.4
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15