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Solder Alloy 702 vs. Zamak 7

Solder alloy 702 belongs to the otherwise unclassified metals classification, while Zamak 7 belongs to the zinc alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is solder alloy 702 and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
86
Elongation at Break, % 21
13
Poisson's Ratio 0.36
0.25
Shear Modulus, GPa 19
33
Tensile Strength: Ultimate (UTS), MPa 53
280

Thermal Properties

Latent Heat of Fusion, J/g 61
120
Melting Completion (Liquidus), °C 220
390
Melting Onset (Solidus), °C 220
380
Specific Heat Capacity, J/kg-K 220
410
Thermal Conductivity, W/m-K 62
110
Thermal Expansion, µm/m-K 22
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
27
Electrical Conductivity: Equal Weight (Specific), % IACS 18
38

Otherwise Unclassified Properties

Density, g/cm3 7.4
6.4
Embodied Carbon, kg CO2/kg material 17
3.0
Embodied Energy, MJ/kg 290
57

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.5
Stiffness to Weight: Bending, points 17
23
Strength to Weight: Axial, points 2.0
12
Strength to Weight: Bending, points 4.2
15
Thermal Diffusivity, mm2/s 38
43
Thermal Shock Resistance, points 3.4
8.6

Alloy Composition

Aluminum (Al), % 0 to 0.0010
3.5 to 4.3
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
Copper (Cu), % 0 to 0.050
0 to 0.25
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.075
Lead (Pb), % 0 to 0.070
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Nickel (Ni), % 0 to 0.010
0.0050 to 0.020
Silver (Ag), % 2.8 to 3.2
0
Tin (Sn), % 96.3 to 97.2
0 to 0.0010
Zinc (Zn), % 0 to 0.0010
95.3 to 96.5