![]() 601B/3411 and the appropriate braze alloy is an option. If this is the case, then brazing the stainless steel with a flux like our No. Sometimes you need an even stronger joint, and you don’t mind exposing the parts to higher temperatures than soldering. Soldering stainless steel is a great option for creating strong joints without exposing the parts to higher heats. Check out our VideoĬheck out the amazing video we have that shows you how to solder Stainless Steel! How about Brazing? Wash off flux residues off well, otherwise, they might come back to haunt you in the form of corrosion. Therefore, make sure to clean off flux residues with warm water after soldering. These residues, if left on the part, can cause corrosion of the parts down the line. 71, leave a strong residue after soldering. One important point to stress when soldering stainless steel: the fluxes you’ll need, like our No. Also, wear the necessary safety gloves, respiratory protection, and eye protection, as specified in the SDS (safety data sheet). 71, give off strong fumes that you are harmful to breath in. As with all soldering, make sure you work in a well-ventilated area with full respiratory protection. But don’t start before considering safety. Once you have the three ingredients, the right flux, the right solder, and the right heating tool, you’re ready to solder stainless steel. When soldering stainless steel, don’t be stingy with heat. You need to use a torch (Oxy-Acetylene or Map gas, for example) or the kind of heavy-duty soldering irons that roofers like to use. This means that, unless the parts you’re soldering have a small mass, a standard soldering iron won’t be hot enough. You need to heat up the surface of the stainless steel so that you activate the flux and the surface of the stainless steel can accept the solder. It’s not like soldering Copper, where all you need to do is melt the solder and soldering happens. You need to turn on the heat when soldering Stainless Steel. Yes, the addition of Silver increases the cost of the solder, but it makes a difference when it comes to soldering stainless steel. Or where you can use a Lead-bearing solder, it may be the Sn45/Pb54/Ag1 (45% Tin, 54% Lead & 1% Silver). This may be a Lead-Free solder, like a Sn96/Ag4 (96% Tin & 4% Silver). The key word when it comes to “the right solder” for stainless steel is “Silver.” Solders that have some Silver do a better job with soldering stainless steel. Choosing the Right Solder for Stainless SteelĬhoosing the right solder is as important as choosing the right flux. 78, that works well with soldering stainless steel. Examples of where a paste form is advantageous can include working with a vertically oriented piece or when you want to apply a lot of flux at one location. However, if you need a paste flux, try our No. 71 is a liquid flux, which is great for many applications. 71 has the strong ingredients that are needed for soldering stainless steel. The kind of fluxes you use for plumbing, for example, are generally not strong enough to solder stainless steel (though they’ll do fine for soldering Copper). When we say “the right flux” we mean an active flux, like our No. When it comes to soldering stainless steel, it is crucial that you choose the right flux. Choosing the Right Flux for Stainless Steel They key to successful soldering of stainless steel lies in three key areas: the flux, the solder, and the heat source. Many of the commonly-used stainless steels can be soldered. 144 are water-soluble.Soldering stainless steel is not as easy as soldering Copper or even mild steel, but it can be done. 144 is also an excellent choice for badly oxidized copper. 144 can be precision dispensed either automatically or manually, or applied with a brush or similar implement. This soldering flux was specifically formulated for situations where dispensing is required for a stainless steel soldering application. 144 is a unique Water-Soluble paste flux. 79 is an Acid-Free flux formulated for stainless steel, high-chrome alloys and other general soldering applications. Due to its high viscosity, the gel flux does not migrate upon heating, providing a more restrictive solder flow. 78 is a gel form stainless steel soldering flux. 75 is a inorganic acid, general purpose flux for stainless steel. Fluoride etches glass, and thus this flux should not be used on parts where glass etching would be an issue. ![]() 71 contains Zinc Chloride, Ammonium Chloride, Hydrochloric Acid and a fluoride activator. 71 is our most active flux for soldering stainless steel. 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.
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