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Solder Alloy 721 vs. C66100 Bronze

Solder alloy 721 belongs to the otherwise unclassified metals classification, while C66100 bronze belongs to the copper 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 721 and the bottom bar is C66100 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
120
Elongation at Break, % 17
8.0 to 40
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
43
Tensile Strength: Ultimate (UTS), MPa 50
410 to 790

Thermal Properties

Latent Heat of Fusion, J/g 61
260
Melting Completion (Liquidus), °C 220
1050
Melting Onset (Solidus), °C 210
1000
Specific Heat Capacity, J/kg-K 220
400
Thermal Conductivity, W/m-K 56
34
Thermal Expansion, µm/m-K 22
17

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.7
Embodied Carbon, kg CO2/kg material 17
2.6
Embodied Energy, MJ/kg 280
42

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.4
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 1.9
13 to 25
Strength to Weight: Bending, points 4.1
14 to 22
Thermal Diffusivity, mm2/s 34
9.7
Thermal Shock Resistance, points 3.2
15 to 29

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
Copper (Cu), % 0.3 to 0.7
92 to 97
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.25
Lead (Pb), % 0 to 0.070
0.2 to 0.8
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
2.8 to 3.5
Silver (Ag), % 2.3 to 2.7
0
Tin (Sn), % 95 to 96.6
0
Zinc (Zn), % 0 to 0.0010
0 to 1.5
Residuals, % 0
0 to 0.5