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Stainless Steel Soldering Flux
Superior Flux offers a full range of Inorganic Acid, Zinc Chloride stainless steel soldering fluxes. Zinc Chloride fluxes are ideal for soldering stainless steel, brass, copper and other hard-to-solder base metals.
| Superior Flux Number |
Description | Rec. Solders |
Rec. Temp Ranges | Specs. | MSDS | Spec. Sheet |
| No. 75 | General Purpose Liquid Solder Flux | Tin-Based; Lead-Free or Lead-Bearing | 95-345°C 200-650°F |
O-F-506C, Type 1, Form B |  |
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| No. 71 | High Activity Stainless Steel Liquid Flux | Tin-Based; Lead-Free or Lead-Bearing | 95-425°C 200-800°F |
O-F-506C, Type 1, Form B | |
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| No. 79 | Acid-Free Liquid Solder Flux | Tin-Based; Lead-Free or Lead-Bearing | 95-315°C 200-600°F |
N/A | |
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| No. 78 | Gel Solder Flux – Water-Soluble | Tin-Based; Lead-Free or Lead-Bearing | 95-425°C 200-800°F |
N/A | |
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| No. 144 | Paste Solder Flux – Water-Soluble | Tin-Based; Lead-Free or Lead-Bearing | 105-345°C 220-650°F |
N/A | |
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All stainless steel soldering fluxes are RoHS compliant.
Superior No. 75 is an excellent, General Purpose soldering flux for stainless steel and other alloys. Due to the activity of this inorganic acid flux, pre-cleaning of joints is often not necessary. Superior No. 75 contains Zinc Chloride, Ammonium Chloride and Hydrochloric Acid.
Superior No. 71 is a high-activity Zinc Chloride flux formulated for situations where a general-purpose soft soldering flux is not strong enough or for badly oxidized or difficult-to-solder metals like stainless steels, Monel, High-Chrome alloys and Inconel. No. 71 contains Zinc Chloride, Ammonium Chloride, Hydrochloric Acid and a bifluoride. Bifluorides etch glass and should not be used on parts where glass etching will be an issue.
Superior No. 79 is an Acid-Free flux formulated for stainless steel and high-chrome alloys.
Superior No. 78 is a gel form General Purpose acid flux. Due to a high viscosity, the gel flux does not migrate upon heating, providing a more restrictive solder flow.
Superior No. 144 is a unique Water-Soluble paste flux. This soldering flux was specifically formulated for soldering stainless steel, copper and copper-alloy tubes. It is also an excellent choice for copper pipes used in HVAC, mechanical and fire sprinkler systems.