Flux-Cored Wire
Indium Corporation uses only “conflict-free” and grade A (per ASTM B32) metals, as well as other high purity metals for its flux-cored wire. Our materials have been tested and certified to meet IPC J-STD-004B and other relevant industry specifications, including the legacy military specification QQ-S-571f. Indium Corporation’s flux-cored wire is well known for its:
- Void-free
- Evenly layer winding
- Low oxide shiny appearance over time
- Non-offensive odor for the 800 series and 200 series fluxes
CW-219 Activated Flux-Cored Wire
Indium Corporation has developed a range of no-clean flux-cored wire solutions to meet the needs of virtually every assembly and rework operation. Cored wire formulas have evolved over time, but Indium Corporation’s new line of flux-cored wire goes back to the basics by adapting simple and traditional cored wire fluxes to address today’s assembly needs. Additionally, this new line of flux-cored wire has reduced spattering when compared to other formulas.
CW-219 Highly-Activated Rosin Flux is designed for soldering to very oxidized copper, nickel, brass, bronze, zinc coatings, tin-plated steel, and similar surfaces. Customers prefer CW-219 for non-sensitive applications where they would like to increase the speed of wetting to achieve higher throughput. CW-219 has been confirmed to meet the requirements of J-STD-004 and J-STD-004B type ROM1.
Process Recommendations
Match the tip size to the part to be soldered
Apply the solder wire to the joint, not to the soldering iron tip
Use the lowest temperature possible
610–700°F (320–370°C) for SnPb and Pb-free
Surface mount (SMT) soldering should be completed in 1–2 seconds
Plated through-hole (PTH) soldering should be completed in 0.5–7.0 seconds
The robotic soldering process set-up is highly customizable and depends on the assembly being soldered
A smooth solder joint appearance requires the correct amount of temperature and time; fine-tuning the process parameters may be required to achieve the best possible outcome
During robotic soldering, flux build-up and charring may occur; to avoid build-up, increase the iron tip cleaning frequency or reduce the iron tip temperature
Removing Flux Residue
CW-219 flux residue is non-corrosive; however, some applications require the removal of flux residues for cosmetic, reliability, or secondary operations. The residue can be removed with most solvents and saponifiers. Please contact Indium Corporation for specific recommendations with your chosen residue remover.