Stainless Steel Soldering Flux

Superior No. 71 is a high-activity Zinc Chloride flux formulated for situations where a general-purpose soft soldering flux is not strong enough for badly oxidized or difficult-to-solder metals like stainless steels, Monel, High-Chrome alloys and Inconel. No. 71 is our most active flux for soldering stainless steel. No. 71 contains Zinc Chloride, Ammonium Chloride, Hydrochloric Acid and a fluoride activator. Fluoride etches glass, and thus this flux should not be used on parts where glass etching would be an issue. The post-solder residues from No. 71 are water-soluble.

Superior No. 75 is a inorganic acid, general purpose flux for stainless steel. It isn’t quite as active as No. 71, but instead, No. 75 is compatible with glass parts.

Superior No. 78 is a gel form stainless steel soldering flux. Due to its high viscosity, the gel flux does not migrate upon heating, providing a more restrictive solder flow. The post-solder residues from No. 78 are water-soluble.

Superior No. 79 is an Acid-Free flux formulated for stainless steel, high-chrome alloys and other general soldering applications.

Superior No. 144 is a unique Water-Soluble paste flux. This soldering flux was specifically formulated for situations where dispensing is required for a stainless steel soldering application. No. 144 can be precision dispensed either automatically or manually, or applied with a brush or similar implement. No. 144 is also an excellent choice for badly oxidized copper. The post-solder residues from No. 144 are water-soluble.