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Solder Alloy 704 vs. C12600 Copper

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C12600 copper 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 C12600 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
120
Elongation at Break, % 30
56
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
56
Tensile Strength: Ultimate (UTS), MPa 55
270

Thermal Properties

Latent Heat of Fusion, J/g 62
210
Melting Completion (Liquidus), °C 240
1080
Melting Onset (Solidus), °C 220
1030
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
29
Electrical Conductivity: Equal Weight (Specific), % IACS 15
29

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 19
2.6
Embodied Energy, MJ/kg 320
41

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.2
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
8.2
Strength to Weight: Bending, points 4.3
10
Thermal Diffusivity, mm2/s 30
39
Thermal Shock Resistance, points 3.5
9.5

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
99.5 to 99.8
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 0 to 0.070
0
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.2 to 0.4
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
0