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Solder Alloy 103 vs. Solder Alloy 402

Both solder alloy 103 and solder alloy 402 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 60% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 103 and the bottom bar is solder alloy 402.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 37
52
Elongation at Break, % 47
20
Poisson's Ratio 0.39
0.36
Shear Modulus, GPa 13
19
Tensile Strength: Ultimate (UTS), MPa 52
57

Thermal Properties

Latent Heat of Fusion, J/g 45
64
Melting Completion (Liquidus), °C 190
310
Melting Onset (Solidus), °C 180
230
Specific Heat Capacity, J/kg-K 180
230
Thermal Conductivity, W/m-K 50
61
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
15
Electrical Conductivity: Equal Weight (Specific), % IACS 12
18

Otherwise Unclassified Properties

Density, g/cm3 8.9
7.3
Embodied Carbon, kg CO2/kg material 10
15
Embodied Energy, MJ/kg 180
250
Embodied Water, L/kg 910
1180

Common Calculations

Stiffness to Weight: Axial, points 2.3
3.9
Stiffness to Weight: Bending, points 12
17
Strength to Weight: Axial, points 1.6
2.2
Strength to Weight: Bending, points 3.5
4.5
Thermal Diffusivity, mm2/s 30
37
Thermal Shock Resistance, points 4.3
3.6

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.2
0 to 0.1
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), % 0 to 0.080
2.5 to 3.5
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), % 38.8 to 40.5
0 to 0.070
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
95.9 to 97.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010