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Solder Alloy 131 vs. R30021 Cobalt

Solder alloy 131 belongs to the otherwise unclassified metals classification, while R30021 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 131 and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 38
220
Elongation at Break, % 47
9.0
Poisson's Ratio 0.39
0.29
Shear Modulus, GPa 14
86
Tensile Strength: Ultimate (UTS), MPa 31
700

Thermal Properties

Latent Heat of Fusion, J/g 46
330
Melting Completion (Liquidus), °C 180
1350
Melting Onset (Solidus), °C 180
1190
Specific Heat Capacity, J/kg-K 190
450
Thermal Conductivity, W/m-K 55
15
Thermal Expansion, µm/m-K 25
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.4
Embodied Carbon, kg CO2/kg material 11
8.0
Embodied Energy, MJ/kg 180
110
Embodied Water, L/kg 940
520

Common Calculations

Stiffness to Weight: Axial, points 2.4
15
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 1.0
23
Strength to Weight: Bending, points 2.5
21
Thermal Diffusivity, mm2/s 33
3.8
Thermal Shock Resistance, points 2.4
21

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0.2 to 0.5
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), % 35.5 to 37.3
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), % 0 to 0.1
0
Tin (Sn), % 62.5 to 63.5
0
Zinc (Zn), % 0 to 0.0010
0