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Solder Alloy 704 vs. C31600 Bronze

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C31600 bronze belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is C31600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
6.7 to 28
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
42
Tensile Strength: Ultimate (UTS), MPa 55
270 to 460

Thermal Properties

Latent Heat of Fusion, J/g 62
200
Melting Completion (Liquidus), °C 240
1040
Melting Onset (Solidus), °C 220
1010
Specific Heat Capacity, J/kg-K 220
380
Thermal Conductivity, W/m-K 50
140
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
32
Electrical Conductivity: Equal Weight (Specific), % IACS 15
33

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.8
Embodied Carbon, kg CO2/kg material 19
2.7
Embodied Energy, MJ/kg 320
43

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.1
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
8.5 to 15
Strength to Weight: Bending, points 4.3
11 to 15
Thermal Diffusivity, mm2/s 30
42
Thermal Shock Resistance, points 3.5
9.4 to 16

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
Copper (Cu), % 0 to 0.050
87.5 to 90.5
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
1.3 to 2.5
Nickel (Ni), % 0 to 0.010
0.7 to 1.2
Phosphorus (P), % 0
0.040 to 0.1
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
5.2 to 10.5
Residuals, % 0
0 to 0.4