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Solder Alloy 704 vs. C82500 Copper

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C82500 copper belongs to the copper alloys. There are 22 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 704 and the bottom bar is C82500 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
120
Elongation at Break, % 30
1.0 to 20
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
45
Tensile Strength: Ultimate (UTS), MPa 55
550 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 62
240
Melting Completion (Liquidus), °C 240
980
Melting Onset (Solidus), °C 220
860
Specific Heat Capacity, J/kg-K 220
390
Thermal Conductivity, W/m-K 50
130
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
20
Electrical Conductivity: Equal Weight (Specific), % IACS 15
21

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.8
Embodied Carbon, kg CO2/kg material 19
10
Embodied Energy, MJ/kg 320
160

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.7
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 2.1
18 to 35
Strength to Weight: Bending, points 4.3
17 to 27
Thermal Diffusivity, mm2/s 30
38
Thermal Shock Resistance, points 3.5
19 to 38

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.15
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Beryllium (Be), % 0
1.9 to 2.3
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Chromium (Cr), % 0
0 to 0.1
Cobalt (Co), % 0
0.15 to 0.7
Copper (Cu), % 0 to 0.050
95.3 to 97.8
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 to 0.020
Nickel (Ni), % 0 to 0.010
0 to 0.2
Silicon (Si), % 0
0.2 to 0.35
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0 to 0.1
Titanium (Ti), % 0
0 to 0.12
Zinc (Zn), % 0 to 0.0010
0 to 0.1
Residuals, % 0
0 to 0.5