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Solder Alloy 704 vs. R30155 Cobalt

Solder alloy 704 belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 14
220
Elastic (Young's, Tensile) Modulus, GPa 51
210
Elongation at Break, % 30
34
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
81
Tensile Strength: Ultimate (UTS), MPa 55
850

Thermal Properties

Latent Heat of Fusion, J/g 62
300
Melting Completion (Liquidus), °C 240
1470
Melting Onset (Solidus), °C 220
1420
Specific Heat Capacity, J/kg-K 220
450
Thermal Conductivity, W/m-K 50
12
Thermal Expansion, µm/m-K 22
14

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.5
Embodied Carbon, kg CO2/kg material 19
9.7
Embodied Energy, MJ/kg 320
150

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
23
Strength to Weight: Axial, points 2.1
28
Strength to Weight: Bending, points 4.3
24
Thermal Diffusivity, mm2/s 30
3.2
Thermal Shock Resistance, points 3.5
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), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
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
24.3 to 36.2
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.010
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tin (Sn), % 94.3 to 95.2
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 0.0010
0