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Solder Alloy 171 vs. Solder Alloy 701

Both solder alloy 171 and solder alloy 701 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 64% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is solder alloy 171 and the bottom bar is solder alloy 701.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 38
51
Elongation at Break, % 45
37
Poisson's Ratio 0.39
0.36
Shear Modulus, GPa 14
19
Tensile Strength: Ultimate (UTS), MPa 48
54

Thermal Properties

Latent Heat of Fusion, J/g 47
61
Melting Completion (Liquidus), °C 180
230
Melting Onset (Solidus), °C 180
220
Specific Heat Capacity, J/kg-K 190
220
Thermal Conductivity, W/m-K 50
52
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
14
Electrical Conductivity: Equal Weight (Specific), % IACS 12
17

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.4
Embodied Carbon, kg CO2/kg material 13
18
Embodied Energy, MJ/kg 210
300

Common Calculations

Stiffness to Weight: Axial, points 2.4
3.8
Stiffness to Weight: Bending, points 13
17
Strength to Weight: Axial, points 1.5
2.0
Strength to Weight: Bending, points 3.3
4.3
Thermal Diffusivity, mm2/s 30
32
Thermal Shock Resistance, points 3.7
3.5

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
0 to 0.050
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), % 34.7 to 36.7
0 to 0.070
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 1.8 to 2.2
3.5 to 3.9
Tin (Sn), % 61.5 to 62.5
95.6 to 96.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010