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Solder Alloy 703 vs. Solder Alloy 103

Both solder alloy 703 and solder alloy 103 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 60% of their average alloy composition in common. There are 22 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 103.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
37
Elongation at Break, % 35
47
Poisson's Ratio 0.36
0.39
Shear Modulus, GPa 19
13
Tensile Strength: Ultimate (UTS), MPa 57
52

Thermal Properties

Latent Heat of Fusion, J/g 61
45
Melting Completion (Liquidus), °C 220
190
Melting Onset (Solidus), °C 220
180
Specific Heat Capacity, J/kg-K 220
180
Thermal Conductivity, W/m-K 55
50
Thermal Expansion, µm/m-K 22
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
11
Electrical Conductivity: Equal Weight (Specific), % IACS 17
12

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.9
Embodied Carbon, kg CO2/kg material 18
10
Embodied Energy, MJ/kg 300
180

Common Calculations

Stiffness to Weight: Axial, points 3.8
2.3
Stiffness to Weight: Bending, points 17
12
Strength to Weight: Axial, points 2.1
1.6
Strength to Weight: Bending, points 4.4
3.5
Thermal Diffusivity, mm2/s 33
30
Thermal Shock Resistance, points 3.7
4.3

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.1
0 to 0.2
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
0 to 0.1
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
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
38.8 to 40.5
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
59.5 to 60.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010