Solder Alloy 704 vs. C18900 Copper
Solder alloy 704 belongs to the otherwise unclassified metals classification, while C18900 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 C18900 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 51 | |
| 120 |
| Elongation at Break, % | 30 | |
| 14 to 48 |
| Poisson's Ratio | 0.36 | |
| 0.34 |
| Shear Modulus, GPa | 19 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 55 | |
| 260 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 62 | |
| 210 |
| Melting Completion (Liquidus), °C | 240 | |
| 1080 |
| Melting Onset (Solidus), °C | 220 | |
| 1020 |
| 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 | |
| 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 15 | |
| 30 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.5 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 19 | |
| 2.7 |
| Embodied Energy, MJ/kg | 320 | |
| 42 |
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 to 16 |
| Strength to Weight: Bending, points | 4.3 | |
| 10 to 16 |
| Thermal Diffusivity, mm2/s | 30 | |
| 38 |
| Thermal Shock Resistance, points | 3.5 | |
| 9.3 to 18 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.010 |
| 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 | |
| 97.7 to 99.15 |
| 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 to 0.020 |
| Manganese (Mn), % | 0 | |
| 0.1 to 0.3 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.050 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.4 |
| Silver (Ag), % | 4.8 to 5.2 | |
| 0 |
| Tin (Sn), % | 94.3 to 95.2 | |
| 0.6 to 0.9 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 to 0.1 |
| Residuals, % | 0 | |
| 0 to 0.5 |