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Solder Alloy 123 vs. R30012 Cobalt

Solder alloy 123 belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. 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 solder alloy 123 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 18
220
Elongation at Break, % 45
1.0
Poisson's Ratio 0.44
0.28
Shear Modulus, GPa 6.2
86
Tensile Strength: Ultimate (UTS), MPa 28
830

Thermal Properties

Latent Heat of Fusion, J/g 26
320
Melting Completion (Liquidus), °C 310
1470
Melting Onset (Solidus), °C 300
1280
Specific Heat Capacity, J/kg-K 130
440
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 29
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
1.8

Otherwise Unclassified Properties

Density, g/cm3 11
8.8
Embodied Carbon, kg CO2/kg material 4.5
8.3
Embodied Energy, MJ/kg 74
120
Embodied Water, L/kg 500
480

Common Calculations

Stiffness to Weight: Axial, points 0.9
14
Stiffness to Weight: Bending, points 7.8
23
Strength to Weight: Axial, points 0.69
26
Strength to Weight: Bending, points 1.8
22
Thermal Diffusivity, mm2/s 16
3.8
Thermal Shock Resistance, points 3.8
23

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
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
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 3.0
Lead (Pb), % 93.5 to 95.5
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.010
0 to 3.0
Silicon (Si), % 0
0 to 2.0
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 4.5 to 5.5
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.0010
0