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Solder Alloy 704 vs. C89320 Bronze

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C89320 bronze belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is C89320 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
17
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 55
270

Thermal Properties

Latent Heat of Fusion, J/g 62
190
Melting Completion (Liquidus), °C 240
1050
Melting Onset (Solidus), °C 220
930
Specific Heat Capacity, J/kg-K 220
360
Thermal Conductivity, W/m-K 50
56
Thermal Expansion, µm/m-K 22
17

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 19
3.5
Embodied Energy, MJ/kg 320
56

Common Calculations

Stiffness to Weight: Axial, points 3.8
6.8
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
8.5
Strength to Weight: Bending, points 4.3
10
Thermal Diffusivity, mm2/s 30
17
Thermal Shock Resistance, points 3.5
10

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0050
Antimony (Sb), % 0 to 0.1
0 to 0.35
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
4.0 to 6.0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
87 to 91
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.2
Lead (Pb), % 0 to 0.070
0 to 0.090
Nickel (Ni), % 0 to 0.010
0 to 1.0
Phosphorus (P), % 0
0 to 0.3
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 94.3 to 95.2
5.0 to 7.0
Zinc (Zn), % 0 to 0.0010
0 to 1.0
Residuals, % 0
0 to 0.5