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Solder Alloy 103 vs. Solder Alloy 104

Both solder alloy 103 and solder alloy 104 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is solder alloy 103 and the bottom bar is solder alloy 104.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 37
37
Elongation at Break, % 47
46
Poisson's Ratio 0.39
0.39
Shear Modulus, GPa 13
13
Tensile Strength: Ultimate (UTS), MPa 52
51

Thermal Properties

Latent Heat of Fusion, J/g 45
45
Melting Completion (Liquidus), °C 190
190
Melting Onset (Solidus), °C 180
180
Specific Heat Capacity, J/kg-K 180
180
Thermal Conductivity, W/m-K 50
50
Thermal Expansion, µm/m-K 24
25

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.9
Embodied Carbon, kg CO2/kg material 10
10
Embodied Energy, MJ/kg 180
180
Embodied Water, L/kg 910
900

Common Calculations

Stiffness to Weight: Axial, points 2.3
2.3
Stiffness to Weight: Bending, points 12
12
Strength to Weight: Axial, points 1.6
1.6
Strength to Weight: Bending, points 3.5
3.4
Thermal Diffusivity, mm2/s 30
30
Thermal Shock Resistance, points 4.3
4.0

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.2
0 to 0.050
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
0 to 0.050
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
Copper (Cu), % 0 to 0.080
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), % 38.8 to 40.5
39 to 40.5
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
0 to 0.1
Tin (Sn), % 59.5 to 60.5
59.5 to 60.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010