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Solder Alloy 123 vs. C70250 Copper

Solder alloy 123 belongs to the otherwise unclassified metals classification, while C70250 copper belongs to the copper alloys. There are 23 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is solder alloy 123 and the bottom bar is C70250 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 18
120
Poisson's Ratio 0.44
0.34
Shear Modulus, GPa 6.2
44
Tensile Strength: Ultimate (UTS), MPa 28
520 to 740

Thermal Properties

Latent Heat of Fusion, J/g 26
220
Melting Completion (Liquidus), °C 310
1100
Melting Onset (Solidus), °C 300
1080
Specific Heat Capacity, J/kg-K 130
390
Thermal Conductivity, W/m-K 23
170
Thermal Expansion, µm/m-K 29
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
36 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
37 to 51

Otherwise Unclassified Properties

Base Metal Price, % relative 75
31
Density, g/cm3 11
8.9
Embodied Carbon, kg CO2/kg material 4.5
2.9
Embodied Energy, MJ/kg 74
45
Embodied Water, L/kg 500
310

Common Calculations

Stiffness to Weight: Axial, points 0.9
7.4
Stiffness to Weight: Bending, points 7.8
18
Strength to Weight: Axial, points 0.69
16 to 23
Strength to Weight: Bending, points 1.8
16 to 21
Thermal Diffusivity, mm2/s 16
49
Thermal Shock Resistance, points 3.8
18 to 26

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0050
0
Copper (Cu), % 0 to 0.080
92.7 to 97.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 93.5 to 95.5
0 to 0.050
Magnesium (Mg), % 0
0.050 to 0.3
Manganese (Mn), % 0
0 to 0.1
Nickel (Ni), % 0 to 0.010
2.2 to 4.2
Silicon (Si), % 0
0.25 to 1.2
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 4.5 to 5.5
0
Zinc (Zn), % 0 to 0.0010
0 to 1.0
Residuals, % 0
0 to 0.5