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Solder Alloy 402 vs. Solder Alloy 142

Both solder alloy 402 and solder alloy 142 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 48% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 402 and the bottom bar is solder alloy 142.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 52
33
Elongation at Break, % 20
37
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 19
12
Tensile Strength: Ultimate (UTS), MPa 57
43

Thermal Properties

Latent Heat of Fusion, J/g 64
42
Melting Completion (Liquidus), °C 310
210
Melting Onset (Solidus), °C 230
180
Specific Heat Capacity, J/kg-K 230
170
Thermal Conductivity, W/m-K 61
45
Thermal Expansion, µm/m-K 22
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
11
Electrical Conductivity: Equal Weight (Specific), % IACS 18
11

Otherwise Unclassified Properties

Density, g/cm3 7.3
9.3
Embodied Carbon, kg CO2/kg material 15
9.4
Embodied Energy, MJ/kg 250
160
Embodied Water, L/kg 1180
890

Common Calculations

Stiffness to Weight: Axial, points 3.9
2.0
Stiffness to Weight: Bending, points 17
11
Strength to Weight: Axial, points 2.2
1.3
Strength to Weight: Bending, points 4.5
2.9
Thermal Diffusivity, mm2/s 37
28
Thermal Shock Resistance, points 3.6
3.7

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.1
0 to 0.2
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
2.5 to 3.5
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
Copper (Cu), % 2.5 to 3.5
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), % 0 to 0.070
47.4 to 50
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
0 to 0.1
Tin (Sn), % 95.9 to 97.5
47.5 to 48.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010