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ZA-27 vs. Solder Alloy 121

ZA-27 belongs to the zinc alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 25 material properties with values for both materials. Properties with values for just one material (11, 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 ZA-27 and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 120
11
Elastic (Young's, Tensile) Modulus, GPa 78
21
Elongation at Break, % 2.0 to 4.5
25
Poisson's Ratio 0.27
0.43
Shear Modulus, GPa 31
7.5
Tensile Strength: Ultimate (UTS), MPa 400 to 430
32

Thermal Properties

Latent Heat of Fusion, J/g 130
29
Melting Completion (Liquidus), °C 480
290
Melting Onset (Solidus), °C 380
230
Specific Heat Capacity, J/kg-K 530
140
Thermal Conductivity, W/m-K 130
31
Thermal Expansion, µm/m-K 26
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 53
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
80
Density, g/cm3 5.0
11
Embodied Carbon, kg CO2/kg material 4.2
5.6
Embodied Energy, MJ/kg 80
93
Embodied Water, L/kg 570
580

Common Calculations

Stiffness to Weight: Axial, points 8.6
1.1
Stiffness to Weight: Bending, points 28
8.6
Strength to Weight: Axial, points 22 to 24
0.84
Strength to Weight: Bending, points 24 to 25
2.1
Thermal Diffusivity, mm2/s 47
20
Thermal Shock Resistance, points 14 to 15
3.9

Alloy Composition

Aluminum (Al), % 25 to 28
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0 to 0.0060
0 to 0.0050
Copper (Cu), % 2.0 to 2.5
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.1
0 to 0.020
Lead (Pb), % 0 to 0.0060
83.4 to 85.5
Magnesium (Mg), % 0.010 to 0.020
0
Nickel (Ni), % 0 to 0.020
0 to 0.010
Silicon (Si), % 0 to 0.080
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0 to 0.0030
14.5 to 15.5
Zinc (Zn), % 69.3 to 73
0 to 0.0010