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Solder Alloy 161 vs. Solder Alloy 131

Both solder alloy 161 and solder alloy 131 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 161 and the bottom bar is solder alloy 131.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 38
38
Elongation at Break, % 44
47
Poisson's Ratio 0.39
0.39
Shear Modulus, GPa 14
14
Tensile Strength: Ultimate (UTS), MPa 53
31

Thermal Properties

Latent Heat of Fusion, J/g 48
46
Melting Completion (Liquidus), °C 190
180
Melting Onset (Solidus), °C 180
180
Specific Heat Capacity, J/kg-K 190
190
Thermal Conductivity, W/m-K 49
55
Thermal Expansion, µm/m-K 25
25

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.8
Embodied Carbon, kg CO2/kg material 11
11
Embodied Energy, MJ/kg 180
180
Embodied Water, L/kg 910
940

Common Calculations

Stiffness to Weight: Axial, points 2.4
2.4
Stiffness to Weight: Bending, points 13
13
Strength to Weight: Axial, points 1.7
1.0
Strength to Weight: Bending, points 3.5
2.5
Thermal Diffusivity, mm2/s 29
33
Thermal Shock Resistance, points 4.1
2.4

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.2
0.2 to 0.5
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), % 1.2 to 1.6
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), % 37.3 to 39.3
35.5 to 37.3
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
62.5 to 63.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010