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Solder Alloy 124 vs. Solder Alloy 136

Both solder alloy 124 and solder alloy 136 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 76% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 124 and the bottom bar is solder alloy 136.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 17
25
Elongation at Break, % 46
19
Poisson's Ratio 0.44
0.42
Shear Modulus, GPa 5.8
8.9
Tensile Strength: Ultimate (UTS), MPa 27
34

Thermal Properties

Latent Heat of Fusion, J/g 24
34
Melting Completion (Liquidus), °C 330
260
Melting Onset (Solidus), °C 320
190
Specific Heat Capacity, J/kg-K 130
150
Thermal Conductivity, W/m-K 22
40
Thermal Expansion, µm/m-K 29
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
9.2
Electrical Conductivity: Equal Weight (Specific), % IACS 7.7
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 70
90
Density, g/cm3 11
10
Embodied Carbon, kg CO2/kg material 4.1
6.8
Embodied Energy, MJ/kg 68
110
Embodied Water, L/kg 470
680

Common Calculations

Stiffness to Weight: Axial, points 0.83
1.4
Stiffness to Weight: Bending, points 7.6
9.5
Strength to Weight: Axial, points 0.65
0.92
Strength to Weight: Bending, points 1.8
2.3
Thermal Diffusivity, mm2/s 15
26
Thermal Shock Resistance, points 3.9
3.6

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.12
0.5 to 2.0
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 0.080
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), % 97.2 to 98.2
71.9 to 75
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
0 to 0.1
Tin (Sn), % 1.8 to 2.2
24.5 to 25.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010