It contains no potassium bifluoride and is gentle on metals and the hands of those brazing with this flux. Type FB3A. Superior No. 66 is recommended for use in most applications where European type flow is required by brazers. This flux works at low temperatures and is particularly effective for compressor and refrigeration applications. 600B is specially formulated for plumbing applications brazing copper to copper and copper to stainless steel. No. 604, and No. 610.
Fluxes are also available in powder form.
Used for dental products, mining tools, snowplow blades, and other high temperature applications. 612 is a white flux formulated for carbide brazing applications above 1800F. Used for carbide brazing of mining tools, snowplow blades, and other high temperature processes. No. 625 is formulated for all aluminum-bronze brazing applications, including shipbuilding and repair, medical, and specialty joining applications. These fluxes typically contain a combination of zinc chloride, hydrochloric acid, and ammonium chloride. These fluxes are used for soldering stainless steel, brass, copper, and other metals commonly joined in industrial applications.