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Solder Alloy 104 vs. R31539 Cobalt

Solder alloy 104 belongs to the otherwise unclassified metals classification, while R31539 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 104 and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 37
220
Elongation at Break, % 46
13 to 22
Poisson's Ratio 0.39
0.29
Shear Modulus, GPa 13
86
Tensile Strength: Ultimate (UTS), MPa 51
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 45
320
Melting Completion (Liquidus), °C 190
1360
Melting Onset (Solidus), °C 180
1290
Specific Heat Capacity, J/kg-K 180
450
Thermal Conductivity, W/m-K 50
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 8.9
8.4
Embodied Carbon, kg CO2/kg material 10
8.2
Embodied Energy, MJ/kg 180
110
Embodied Water, L/kg 900
530

Common Calculations

Stiffness to Weight: Axial, points 2.3
15
Stiffness to Weight: Bending, points 12
24
Strength to Weight: Axial, points 1.6
33 to 44
Strength to Weight: Bending, points 3.4
27 to 32
Thermal Diffusivity, mm2/s 30
3.5
Thermal Shock Resistance, points 4.0
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0.3 to 1.0
Antimony (Sb), % 0 to 0.050
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.050
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
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
Lanthanum (La), % 0
0.030 to 0.2
Lead (Pb), % 39 to 40.5
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), % 59.5 to 60.5
0
Zinc (Zn), % 0 to 0.0010
0