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Solder Alloy 191 vs. R30816 Cobalt

Solder alloy 191 belongs to the otherwise unclassified metals classification, while R30816 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is solder alloy 191 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 19
210
Elongation at Break, % 32
23
Poisson's Ratio 0.43
0.3
Shear Modulus, GPa 6.5
81
Tensile Strength: Ultimate (UTS), MPa 29
1020

Thermal Properties

Latent Heat of Fusion, J/g 27
300
Melting Completion (Liquidus), °C 300
1540
Melting Onset (Solidus), °C 300
1460
Specific Heat Capacity, J/kg-K 130
420
Thermal Conductivity, W/m-K 24
13
Thermal Expansion, µm/m-K 29
12

Otherwise Unclassified Properties

Density, g/cm3 11
9.1
Embodied Carbon, kg CO2/kg material 5.8
20
Embodied Energy, MJ/kg 95
320

Common Calculations

Stiffness to Weight: Axial, points 0.93
13
Stiffness to Weight: Bending, points 8.0
22
Strength to Weight: Axial, points 0.72
31
Strength to Weight: Bending, points 1.9
25
Thermal Diffusivity, mm2/s 16
3.3
Thermal Shock Resistance, points 3.9
28

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
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
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 5.0
Lead (Pb), % 92.4 to 94
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.010
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 1.2 to 1.8
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tin (Sn), % 4.8 to 5.2
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.0010
0