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Solder Alloy 703 vs. Solder Alloy 115

Both solder alloy 703 and solder alloy 115 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is solder alloy 703 and the bottom bar is solder alloy 115.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 15
12
Elastic (Young's, Tensile) Modulus, GPa 51
28
Elongation at Break, % 35
22
Poisson's Ratio 0.36
0.41
Shear Modulus, GPa 19
10
Tensile Strength: Ultimate (UTS), MPa 57
36

Thermal Properties

Latent Heat of Fusion, J/g 61
36
Melting Completion (Liquidus), °C 220
250
Melting Onset (Solidus), °C 220
180
Specific Heat Capacity, J/kg-K 220
160
Thermal Conductivity, W/m-K 55
43
Thermal Expansion, µm/m-K 22
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 17
8.9

Otherwise Unclassified Properties

Density, g/cm3 7.4
9.9
Embodied Carbon, kg CO2/kg material 18
7.8
Embodied Energy, MJ/kg 300
130

Common Calculations

Stiffness to Weight: Axial, points 3.8
1.6
Stiffness to Weight: Bending, points 17
10
Strength to Weight: Axial, points 2.1
1.0
Strength to Weight: Bending, points 4.4
2.4
Thermal Diffusivity, mm2/s 33
27
Thermal Shock Resistance, points 3.7
3.4

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.1
0 to 0.5
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
0 to 0.25
Cadmium (Cd), % 0 to 0.0020
0 to 0.0050
Copper (Cu), % 0 to 0.050
0 to 0.080
Gold (Au), % 0 to 0.050
0 to 0.050
Indium (In), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.020
0 to 0.020
Lead (Pb), % 0 to 0.070
63.4 to 65.5
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 3.3 to 3.7
0 to 0.1
Tin (Sn), % 95.8 to 96.7
34.5 to 35.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010