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Solder Alloy 121 vs. 328.0 Aluminum

Solder alloy 121 belongs to the otherwise unclassified metals classification, while 328.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 328.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 11
60 to 82
Elastic (Young's, Tensile) Modulus, GPa 21
72
Elongation at Break, % 25
1.6 to 2.1
Poisson's Ratio 0.43
0.33
Shear Modulus, GPa 7.5
27
Tensile Strength: Ultimate (UTS), MPa 32
200 to 270

Thermal Properties

Latent Heat of Fusion, J/g 29
510
Melting Completion (Liquidus), °C 290
620
Melting Onset (Solidus), °C 230
560
Specific Heat Capacity, J/kg-K 140
890
Thermal Conductivity, W/m-K 31
120
Thermal Expansion, µm/m-K 28
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
30
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
99

Otherwise Unclassified Properties

Base Metal Price, % relative 80
10
Density, g/cm3 11
2.7
Embodied Carbon, kg CO2/kg material 5.6
7.8
Embodied Energy, MJ/kg 93
140
Embodied Water, L/kg 580
1070

Common Calculations

Stiffness to Weight: Axial, points 1.1
15
Stiffness to Weight: Bending, points 8.6
51
Strength to Weight: Axial, points 0.84
21 to 28
Strength to Weight: Bending, points 2.1
28 to 34
Thermal Diffusivity, mm2/s 20
50
Thermal Shock Resistance, points 3.9
9.2 to 12

Alloy Composition

Aluminum (Al), % 0 to 0.0010
84.5 to 91.1
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 0.35
Copper (Cu), % 0 to 0.080
1.0 to 2.0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 1.0
Lead (Pb), % 83.4 to 85.5
0
Magnesium (Mg), % 0
0.2 to 0.6
Manganese (Mn), % 0
0.2 to 0.6
Nickel (Ni), % 0 to 0.010
0 to 0.25
Silicon (Si), % 0
7.5 to 8.5
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 14.5 to 15.5
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0 to 0.0010
0 to 1.5
Residuals, % 0
0 to 0.5