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Solder Alloy 142 vs. Solder Alloy 151

Both solder alloy 142 and solder alloy 151 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 80% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 142 and the bottom bar is solder alloy 151.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 33
39
Elongation at Break, % 37
37
Poisson's Ratio 0.4
0.37
Shear Modulus, GPa 12
14
Tensile Strength: Ultimate (UTS), MPa 43
46

Thermal Properties

Latent Heat of Fusion, J/g 42
47
Melting Completion (Liquidus), °C 210
150
Melting Onset (Solidus), °C 180
150
Specific Heat Capacity, J/kg-K 170
190
Thermal Conductivity, W/m-K 45
44
Thermal Expansion, µm/m-K 25
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
10
Electrical Conductivity: Equal Weight (Specific), % IACS 11
10

Otherwise Unclassified Properties

Density, g/cm3 9.3
8.8
Embodied Carbon, kg CO2/kg material 9.4
9.2
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 890
920

Common Calculations

Stiffness to Weight: Axial, points 2.0
2.5
Stiffness to Weight: Bending, points 11
13
Strength to Weight: Axial, points 1.3
1.4
Strength to Weight: Bending, points 2.9
3.2
Thermal Diffusivity, mm2/s 28
26
Thermal Shock Resistance, points 3.7
3.2

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), % 2.5 to 3.5
0 to 0.1
Cadmium (Cd), % 0 to 0.0020
17.5 to 18.5
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), % 47.4 to 50
30.3 to 33
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
0 to 0.1
Tin (Sn), % 47.5 to 48.5
49.5 to 50.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010