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Solder Alloy 181 vs. R30021 Cobalt

Solder alloy 181 belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 181 and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 18
220
Elongation at Break, % 41
9.0
Poisson's Ratio 0.44
0.29
Shear Modulus, GPa 6.1
86
Tensile Strength: Ultimate (UTS), MPa 27
700

Thermal Properties

Latent Heat of Fusion, J/g 26
330
Melting Completion (Liquidus), °C 310
1350
Melting Onset (Solidus), °C 300
1190
Specific Heat Capacity, J/kg-K 130
450
Thermal Conductivity, W/m-K 24
15
Thermal Expansion, µm/m-K 29
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
2.1

Otherwise Unclassified Properties

Density, g/cm3 11
8.4
Embodied Carbon, kg CO2/kg material 6.2
8.0
Embodied Energy, MJ/kg 100
110

Common Calculations

Stiffness to Weight: Axial, points 0.86
15
Stiffness to Weight: Bending, points 7.7
24
Strength to Weight: Axial, points 0.66
23
Strength to Weight: Bending, points 1.8
21
Thermal Diffusivity, mm2/s 16
3.8
Thermal Shock Resistance, points 3.8
21

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), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
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), % 96.2 to 98
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0 to 0.010
2.0 to 3.0
Silicon (Si), % 0
0 to 1.5
Silver (Ag), % 2.0 to 3.0
0
Tin (Sn), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.0010
0