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Solder Alloy 151 vs. Solder Alloy 402

Both solder alloy 151 and solder alloy 402 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 50% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 151 and the bottom bar is solder alloy 402.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 39
52
Elongation at Break, % 37
20
Poisson's Ratio 0.37
0.36
Shear Modulus, GPa 14
19
Tensile Strength: Ultimate (UTS), MPa 46
57

Thermal Properties

Latent Heat of Fusion, J/g 47
64
Melting Completion (Liquidus), °C 150
310
Melting Onset (Solidus), °C 150
230
Specific Heat Capacity, J/kg-K 190
230
Thermal Conductivity, W/m-K 44
61
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
15
Electrical Conductivity: Equal Weight (Specific), % IACS 10
18

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.3
Embodied Carbon, kg CO2/kg material 9.2
15
Embodied Energy, MJ/kg 160
250
Embodied Water, L/kg 920
1180

Common Calculations

Stiffness to Weight: Axial, points 2.5
3.9
Stiffness to Weight: Bending, points 13
17
Strength to Weight: Axial, points 1.4
2.2
Strength to Weight: Bending, points 3.2
4.5
Thermal Diffusivity, mm2/s 26
37
Thermal Shock Resistance, points 3.2
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), % 17.5 to 18.5
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), % 30.3 to 33
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), % 49.5 to 50.5
95.9 to 97.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010