Fluxes for Soldering Copper and Brass | Superior Flux & Mfg. Co.

Copper Soldering Flux

Superior Flux offers a complete range of copper soldering fluxes, including safe-to-use organic acid fluxes and more robust inorganic acid (Zinc Chloride) soldering fluxes. If you need a flux for soldering brass that won’t discolor the brass red, please see our Brass Soldering Flux.

No. 30

Superior Flux NumberNo. 30
DescriptionOrganic acid liquid flux – OK for Electronics
Rec. Base MetalsCopper, brass, nickel, alloys 42 & 51, Kovar, some ferrous metals.
Rec. SoldersLead-Free, Tin/Lead, Fusible Alloys
Rec. Temp Ranges95-315°C / 200-600°F
Specs.IPC ANSI-J-STD ORM1; O-F-506C, Type 1, Form B
SDSLink
Spec. SheetLink

No. 75

Superior Flux NumberNo. 75
DescriptionLiquid Acid Solder Flux
Rec. Base MetalsCopper, brass and steels
Rec. SoldersTin-Based; Lead-Free or Lead-Bearing
Rec. Temp Ranges95-345°C 200-650°F
Specs.IPC ANSI-J-STD INH1; O-F-506C, Type 1, Form B
SDSLink
Spec. SheetLink

No. 130

Superior Flux NumberNo. 130
DescriptionPetrolatum Paste Flux
Rec. Base MetalsCopper, brass and steels
Rec. SoldersLead-Free, 50/50 and other Tin/Leads
Rec. Temp Ranges95-315°C / 200-600°F
Specs.O-F-506C, Type 1, Form B; MIL-S-6872A
SDSLink
Spec. SheetLink

No. 135

Superior Flux NumberNo. 135
DescriptionRosin Paste Flux – OK for Electronics
Rec. Base MetalsCopper
Rec. SoldersTin-Based; Lead-Free or Lead-Bearing
Rec. Temp Ranges95-315°C / 200-600°F
Specs.O-F-506C, Type 1, Form B; MIL-S-6872A
SDSLink
Spec. SheetLink
Our Copper Soldering Fluxes are RoHS compliant.

Superior No. 30 is a liquid flux that is ideal for soldering copper or brass.  No. 30 is safer to use than the typical inorganic acid soldering flux.  No. 30 is mild enough to use with electronic and electrical components.  All post-solder residues are water-soluble and must be cleaned off with 60°C/140°F water to avoid cleanliness failures.  No. 30 is typically used with a soldering iron or hot plate, and is not formulated for use with a torch.

Superior No. 75 is an inorganic acid general purpose soldering flux that can be used to solder badly oxidized copper or brass.  No. 75 contains Zinc Chloride and can be soldered with a torch, in addition to a soldering iron or hot plate.  As No. 75 does contain Zinc Chloride, it should not be used with electronic components, as Zinc residues can be detrimental to electronic components.  All post-solder residues are water-soluble and should be cleaned off with 60°/140°F water.

No. 130 is a petroleum-based soldering flux that contains Zinc Chloride and Ammonium Chloride.  No. 130 is ideal for torch soldering of copper pipes and other copper and brass parts.  As No. 130 does contain Zinc Chloride, it should not be used with electronic components, as Zinc residues can be detrimental to electronic components.

Superior No. 135 is a rosin/petrolatum soldering flux paste ideal for use with copper. The petrolatum helps protect the solder joint against attack, and the rosin leaves a protective coating over the solder area after soldering.  No. 135 is ideal for soldering electronic or electrical components.  Soldering should be done with a soldering iron or a hot plate, but not with a torch.

Superior Flux & Mfg. Co. | 6615 Parkland Blvd. | Cleveland, Ohio 44139 | Tel: (+01) 440.349-3000 | Fax: (+01) 440.349-3003 | info@www.superiorflux.com