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Solder Alloy 191 vs. ZA-27

Solder alloy 191 belongs to the otherwise unclassified metals classification, while ZA-27 belongs to the zinc alloys. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is solder alloy 191 and the bottom bar is ZA-27.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 19
78
Elongation at Break, % 32
2.0 to 4.5
Poisson's Ratio 0.43
0.27
Shear Modulus, GPa 6.5
31
Tensile Strength: Ultimate (UTS), MPa 29
400 to 430

Thermal Properties

Latent Heat of Fusion, J/g 27
130
Melting Completion (Liquidus), °C 300
480
Melting Onset (Solidus), °C 300
380
Specific Heat Capacity, J/kg-K 130
530
Thermal Conductivity, W/m-K 24
130
Thermal Expansion, µm/m-K 29
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
30
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
53

Otherwise Unclassified Properties

Density, g/cm3 11
5.0
Embodied Carbon, kg CO2/kg material 5.8
4.2
Embodied Energy, MJ/kg 95
80

Common Calculations

Stiffness to Weight: Axial, points 0.93
8.6
Stiffness to Weight: Bending, points 8.0
28
Strength to Weight: Axial, points 0.72
22 to 24
Strength to Weight: Bending, points 1.9
24 to 25
Thermal Diffusivity, mm2/s 16
47
Thermal Shock Resistance, points 3.9
14 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.0010
25 to 28
Antimony (Sb), % 0 to 0.2
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0 to 0.0060
Copper (Cu), % 0 to 0.080
2.0 to 2.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.1
Lead (Pb), % 92.4 to 94
0 to 0.0060
Magnesium (Mg), % 0
0.010 to 0.020
Nickel (Ni), % 0 to 0.010
0 to 0.020
Silicon (Si), % 0
0 to 0.080
Silver (Ag), % 1.2 to 1.8
0
Tin (Sn), % 4.8 to 5.2
0 to 0.0030
Zinc (Zn), % 0 to 0.0010
69.3 to 73