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Solder Alloy 142 vs. R31538 Cobalt

Solder alloy 142 belongs to the otherwise unclassified metals classification, while R31538 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is solder alloy 142 and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 33
220
Elongation at Break, % 37
13 to 23
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 12
86
Tensile Strength: Ultimate (UTS), MPa 43
1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g 42
320
Melting Completion (Liquidus), °C 210
1360
Melting Onset (Solidus), °C 180
1290
Specific Heat Capacity, J/kg-K 170
450
Thermal Conductivity, W/m-K 45
13
Thermal Expansion, µm/m-K 25
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.1

Otherwise Unclassified Properties

Density, g/cm3 9.3
8.4
Embodied Carbon, kg CO2/kg material 9.4
8.1
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 890
530

Common Calculations

Stiffness to Weight: Axial, points 2.0
15
Stiffness to Weight: Bending, points 11
24
Strength to Weight: Axial, points 1.3
34 to 45
Strength to Weight: Bending, points 2.9
27 to 32
Thermal Diffusivity, mm2/s 28
3.5
Thermal Shock Resistance, points 3.7
25 to 33

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.2
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 2.5 to 3.5
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0.15 to 0.35
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 0 to 0.080
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.75
Lead (Pb), % 47.4 to 50
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.010
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 47.5 to 48.5
0
Zinc (Zn), % 0 to 0.0010
0