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Solder Alloy 704 vs. C38500 Bronze

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C38500 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 C38500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
100
Elongation at Break, % 30
17
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
37
Tensile Strength: Ultimate (UTS), MPa 55
370

Thermal Properties

Latent Heat of Fusion, J/g 62
160
Melting Completion (Liquidus), °C 240
890
Melting Onset (Solidus), °C 220
880
Specific Heat Capacity, J/kg-K 220
380
Thermal Conductivity, W/m-K 50
120
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
28
Electrical Conductivity: Equal Weight (Specific), % IACS 15
31

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.1
Embodied Carbon, kg CO2/kg material 19
2.6
Embodied Energy, MJ/kg 320
45

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.0
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 2.1
13
Strength to Weight: Bending, points 4.3
14
Thermal Diffusivity, mm2/s 30
40
Thermal Shock Resistance, points 3.5
12

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
55 to 59
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.35
Lead (Pb), % 0 to 0.070
2.5 to 3.5
Nickel (Ni), % 0 to 0.010
0
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
36.7 to 42.5
Residuals, % 0
0 to 0.5