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R31538 Cobalt vs. Solder Alloy 123

R31538 cobalt belongs to the cobalt alloys classification, while solder alloy 123 belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is solder alloy 123.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
18
Elongation at Break, % 13 to 23
45
Poisson's Ratio 0.29
0.44
Shear Modulus, GPa 86
6.2
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
28

Thermal Properties

Latent Heat of Fusion, J/g 320
26
Melting Completion (Liquidus), °C 1360
310
Melting Onset (Solidus), °C 1290
300
Specific Heat Capacity, J/kg-K 450
130
Thermal Conductivity, W/m-K 13
23
Thermal Expansion, µm/m-K 13
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
7.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
11
Embodied Carbon, kg CO2/kg material 8.1
4.5
Embodied Energy, MJ/kg 110
74
Embodied Water, L/kg 530
500

Common Calculations

Stiffness to Weight: Axial, points 15
0.9
Stiffness to Weight: Bending, points 24
7.8
Strength to Weight: Axial, points 34 to 45
0.69
Strength to Weight: Bending, points 27 to 32
1.8
Thermal Diffusivity, mm2/s 3.5
16
Thermal Shock Resistance, points 25 to 33
3.8

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.75
0 to 0.020
Lead (Pb), % 0
93.5 to 95.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.010
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
4.5 to 5.5
Zinc (Zn), % 0
0 to 0.0010