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Solder Alloy 704 vs. 1235 Aluminum

Solder alloy 704 belongs to the otherwise unclassified metals classification, while 1235 aluminum belongs to the aluminum alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, 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 704 and the bottom bar is 1235 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
69
Elongation at Break, % 30
28 to 34
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
26
Tensile Strength: Ultimate (UTS), MPa 55
80 to 84

Thermal Properties

Latent Heat of Fusion, J/g 62
400
Melting Completion (Liquidus), °C 240
640
Melting Onset (Solidus), °C 220
640
Specific Heat Capacity, J/kg-K 220
900
Thermal Conductivity, W/m-K 50
230
Thermal Expansion, µm/m-K 22
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
60
Electrical Conductivity: Equal Weight (Specific), % IACS 15
200

Otherwise Unclassified Properties

Density, g/cm3 7.5
2.7
Embodied Carbon, kg CO2/kg material 19
8.3
Embodied Energy, MJ/kg 320
160

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
50
Strength to Weight: Axial, points 2.1
8.2 to 8.6
Strength to Weight: Bending, points 4.3
15 to 16
Thermal Diffusivity, mm2/s 30
93
Thermal Shock Resistance, points 3.5
3.6 to 3.7

Alloy Composition

Aluminum (Al), % 0 to 0.0010
99.35 to 100
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
0 to 0.050
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.65
Lead (Pb), % 0 to 0.070
0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 0.050
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.65
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.0010
0 to 0.1