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Solder Alloy 721 vs. AWS E80C-B8

Solder alloy 721 belongs to the otherwise unclassified metals classification, while AWS E80C-B8 belongs to the iron alloys. There are 22 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 721 and the bottom bar is AWS E80C-B8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
190
Elongation at Break, % 17
19
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 19
75
Tensile Strength: Ultimate (UTS), MPa 50
620

Thermal Properties

Latent Heat of Fusion, J/g 61
270
Melting Completion (Liquidus), °C 220
1450
Melting Onset (Solidus), °C 210
1410
Specific Heat Capacity, J/kg-K 220
470
Thermal Conductivity, W/m-K 56
25
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
9.1
Electrical Conductivity: Equal Weight (Specific), % IACS 17
11

Otherwise Unclassified Properties

Density, g/cm3 7.4
7.8
Embodied Carbon, kg CO2/kg material 17
2.1
Embodied Energy, MJ/kg 280
28

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 1.9
22
Strength to Weight: Bending, points 4.1
21
Thermal Diffusivity, mm2/s 34
6.9
Thermal Shock Resistance, points 3.2
17

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), % 0.8 to 1.2
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
8.0 to 10.5
Copper (Cu), % 0.3 to 0.7
0 to 0.35
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
85.5 to 90.6
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0.4 to 1.0
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 0 to 0.010
0 to 0.2
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0.25 to 0.6
Silver (Ag), % 2.3 to 2.7
0
Sulfur (S), % 0
0 to 0.025
Tin (Sn), % 95 to 96.6
0
Vanadium (V), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.5