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Solder Alloy 301 vs. R30021 Cobalt

Solder alloy 301 belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is solder alloy 301 and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 40
220
Elongation at Break, % 51
9.0
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 15
86
Tensile Strength: Ultimate (UTS), MPa 55
700
Tensile Strength: Yield (Proof), MPa 49
500

Thermal Properties

Latent Heat of Fusion, J/g 55
330
Melting Completion (Liquidus), °C 140
1350
Melting Onset (Solidus), °C 140
1190
Specific Heat Capacity, J/kg-K 160
450
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 4.9
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.4
Embodied Carbon, kg CO2/kg material 13
8.0
Embodied Energy, MJ/kg 210
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
57
Resilience: Unit (Modulus of Resilience), kJ/m3 30
570
Stiffness to Weight: Axial, points 2.5
15
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 1.8
23
Strength to Weight: Bending, points 3.7
21
Thermal Diffusivity, mm2/s 13
3.8
Thermal Shock Resistance, points 7.2
21

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 56.5 to 59
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 0.050
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), % 0 to 0.070
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), % 41 to 43
0
Zinc (Zn), % 0 to 0.0010
0