These applications may include specific types of concentrated localized heating (induction, for example), or may occur during torch heating of large parts. This formulation allows the flux to withstand longer heating cycles without breaking down. There is a maximum amount of oxide absorption the flux provides, after which it becomes saturated and is no longer effective. The black flux formula includes powdered boron which gives the flux a black color (really more brown – but "brown" brazing flux doesn’t have the same panache). Pipe fitting with Stay-Silv® Black Brazing Flux The smoother consistency also reduces fluid separation inside unused containers.ĭynaflow Flux is used for similar brazing applications as the standard white flux. This consistency is developed by introducing an additional step during the manufacturing process. Dynaflow flux was originally developed as a "smoother" flux to facilitate automated feeding. For automated flux dispensing mixture, particles must be held below a minimum size to prevent clogging orifices and lines. This flux conforms to AWS A5.31 class FB3-F and has a temperature range of 1200 - 1600☏ (650 - 870☌).įlux application can be automated on brazing machines using dispensing equipment. The flux can also be mixed as needed with water or alcohol to form a paste, which can then be applied to the part prior to brazing. The flux can be used in its powder form by heating the end of the brazing rod or wire and dipping it in the flux. Because it's a powder it will not separate or harden during storage (keep lid tightly closed as the flux will draw moisture from the air). This is similar to the white flux except in a powder form. Hot-rodding a brazing rod with powder flux White flux conforms to American Welding Society (AWS) specification A5.31 class FB3-A, and Aerospace Material Specification (AMS) 3410. Use it with the Safety-Silv ® high silver brazing filler metals (AWS BAg series) on the above base metals, and the Stay-Silv ® phos-copper-silver (AWS BCuP series) on copper to brass. White flux is useful for brazing copper, brass, steel, stainless steel, and nickel alloys. This is a white paste flux that's used for 90% of silver brazing applications.
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The mixture is blended to ensure smooth application and adherence.Įver wonder about the different flux types and where each is used? Here's a crash course that explores the types of silver brazing flux we manufacture: Fluxes are chemical mixtures that contain varying chemical components. Proper fluxing is important because the flux absorbs oxides formed during heating and promotes the flow of filler metal. A chemical flux is commonly used with many braze filler metals.