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Solder Alloy 136 vs. Solder Alloy 137

Both solder alloy 136 and solder alloy 137 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 136 and the bottom bar is solder alloy 137.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 25
24
Elongation at Break, % 19
19
Poisson's Ratio 0.42
0.42
Shear Modulus, GPa 8.9
8.3
Tensile Strength: Ultimate (UTS), MPa 34
34

Thermal Properties

Latent Heat of Fusion, J/g 34
33
Melting Completion (Liquidus), °C 260
270
Melting Onset (Solidus), °C 190
190
Specific Heat Capacity, J/kg-K 150
150
Thermal Conductivity, W/m-K 40
38
Thermal Expansion, µm/m-K 27
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.2
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
7.7

Otherwise Unclassified Properties

Base Metal Price, % relative 90
85
Density, g/cm3 10
10
Embodied Carbon, kg CO2/kg material 6.8
6.3
Embodied Energy, MJ/kg 110
100
Embodied Water, L/kg 680
660

Common Calculations

Stiffness to Weight: Axial, points 1.4
1.3
Stiffness to Weight: Bending, points 9.5
9.2
Strength to Weight: Axial, points 0.92
0.9
Strength to Weight: Bending, points 2.3
2.2
Thermal Diffusivity, mm2/s 26
25
Thermal Shock Resistance, points 3.6
3.7

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0.5 to 2.0
0.5 to 3.0
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.25
0 to 0.25
Cadmium (Cd), % 0 to 0.0050
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), % 71.9 to 75
75.9 to 80
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
0 to 0.1
Tin (Sn), % 24.5 to 25.5
19.5 to 20.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010