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Solder Alloy 721 vs. C54400 Bronze

Solder alloy 721 belongs to the otherwise unclassified metals classification, while C54400 bronze belongs to the copper alloys. There are 21 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 C54400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 50
330 to 720

Thermal Properties

Latent Heat of Fusion, J/g 61
190
Melting Completion (Liquidus), °C 220
1000
Melting Onset (Solidus), °C 210
930
Specific Heat Capacity, J/kg-K 220
370
Thermal Conductivity, W/m-K 56
86
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
19
Electrical Conductivity: Equal Weight (Specific), % IACS 17
19

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.9
Embodied Carbon, kg CO2/kg material 17
2.9
Embodied Energy, MJ/kg 280
48

Common Calculations

Stiffness to Weight: Axial, points 3.8
6.8
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 1.9
10 to 22
Strength to Weight: Bending, points 4.1
12 to 20
Thermal Diffusivity, mm2/s 34
26
Thermal Shock Resistance, points 3.2
12 to 26

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
85.4 to 91.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.1
Lead (Pb), % 0 to 0.070
3.5 to 4.5
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.010 to 0.5
Silver (Ag), % 2.3 to 2.7
0
Tin (Sn), % 95 to 96.6
3.5 to 4.5
Zinc (Zn), % 0 to 0.0010
1.5 to 4.5
Residuals, % 0
0 to 0.5