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1070 Aluminum vs. Solder Alloy 121

1070 aluminum belongs to the aluminum alloys classification, while solder alloy 121 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 1070 aluminum and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
21
Elongation at Break, % 4.5 to 39
25
Poisson's Ratio 0.33
0.43
Shear Modulus, GPa 26
7.5
Tensile Strength: Ultimate (UTS), MPa 73 to 140
32

Thermal Properties

Latent Heat of Fusion, J/g 400
29
Melting Completion (Liquidus), °C 640
290
Melting Onset (Solidus), °C 640
230
Specific Heat Capacity, J/kg-K 900
140
Thermal Conductivity, W/m-K 230
31
Thermal Expansion, µm/m-K 23
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 200
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
11
Embodied Carbon, kg CO2/kg material 8.3
5.6
Embodied Energy, MJ/kg 160
93
Embodied Water, L/kg 1200
580

Common Calculations

Stiffness to Weight: Axial, points 14
1.1
Stiffness to Weight: Bending, points 50
8.6
Strength to Weight: Axial, points 7.5 to 14
0.84
Strength to Weight: Bending, points 14 to 22
2.1
Thermal Diffusivity, mm2/s 94
20
Thermal Shock Resistance, points 3.3 to 6.1
3.9

Alloy Composition

Aluminum (Al), % 99.7 to 100
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
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 0.040
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.25
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Magnesium (Mg), % 0 to 0.030
0
Manganese (Mn), % 0 to 0.030
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
14.5 to 15.5
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.040
0 to 0.0010
Residuals, % 0 to 0.030
0