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Solder Alloy 103 vs. Solder Alloy 161

Both solder alloy 103 and solder alloy 161 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 103 and the bottom bar is solder alloy 161.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 37
38
Elongation at Break, % 47
44
Poisson's Ratio 0.39
0.39
Shear Modulus, GPa 13
14
Tensile Strength: Ultimate (UTS), MPa 52
53

Thermal Properties

Latent Heat of Fusion, J/g 45
48
Melting Completion (Liquidus), °C 190
190
Melting Onset (Solidus), °C 180
180
Specific Heat Capacity, J/kg-K 180
190
Thermal Conductivity, W/m-K 50
49
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
11
Embodied Energy, MJ/kg 180
180
Embodied Water, L/kg 910
910

Common Calculations

Stiffness to Weight: Axial, points 2.3
2.4
Stiffness to Weight: Bending, points 12
13
Strength to Weight: Axial, points 1.6
1.7
Strength to Weight: Bending, points 3.5
3.5
Thermal Diffusivity, mm2/s 30
29
Thermal Shock Resistance, points 4.3
4.1

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.2
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 0.080
1.2 to 1.6
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
37.3 to 39.3
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