So, while soldering, you won’t have any free hands to hold the metal pieces together. Soldering requires you to use both your hands. Clampdown the 2 Metal Pieces you’re Soldering So They Touch Each Other However, it will take much longer to melt. Solder that contains silver will form an even stronger bond with stainless steel. Another great advantage of using high-tin solder is that it matches the color of the stainless-steel surface and does not affect its visual appeal too much. For binding to stainless steel, you will require a solder that is composed of more than 50% tin. There are various kinds of solder available in the market. Use a Solder that is at Least 50% Tin for the Best Bind You can either use a brush or a piece of cloth to apply the flux paste all over the surfaces of the pieces to be joined together. Acid-based fluxes are best suited for this purpose. You should use a flux that is specifically produced for use with stainless steel. Flux is a paste-like substance that becomes corrosive when melted and corrodes the oxide surface to expose the metal underneath. Hence, the best solution is to treat the surface with acid-based flux. Unless it is removed, the solder will not stick. Wipe an Acid-Based Flux onto the Steel SurfaceĮven after you clean the surface with solvents and metal brushes, the oxide layer will persist. You can also roughen up the surface a bit so that the solder sticks to it better. Therefore, the only way to remove them is by using a metal brush. Remove solid contaminants with a metal wire brush Keep some water handy in case you end up spilling some onto your skin. Keep any naked flame away and wear protective gloves. Of course, you must observe caution while handling acetone as it is not only corrosive but also flammable in nature. In order to remove grease, however, it may not be enough. Isopropyl alcohol is a great solvent for this purpose. Simply pour copious amounts of solvent onto a cloth and wipe the surface. Oil and grease contaminants are also responsible for preventing solder from bonding to the surface. Wipe the Stainless Steel Down with a Solvent to Remove Oil and Grease Keep the doors and windows open at all times during the process. If you are working inside a closed space, make sure that it is well-ventilated. While wearing a mask gives you some level of protection, it is always recommended to work in an open environment. The next thing to worry about is the toxic gas or fumes that the chemicals may emit. This is because if any of the solvents or chemicals touch your eye then it can cause some serious damage. The first and the most important thing is to wear eye protection. Therefore, before you begin to treat the stainless steel surface, you must take all the necessary precautions. Treating stainless steel surfaces requires the use of chemicals and toxins that may harm you physically. Work in a Well-Ventilated Area and Wear Protective Equipment Therefore, before soldering, the surface of the stainless steel must be treated to remove the oxide layer. Clean the Joint with Warm, Running Water to Remove the Remaining FluxĪs discussed, an oxide layer makes it difficult for the solder to bond to the stainless steel. Apply Solder at the Joint of the 2 Metal Pieces Melt Some Solder onto the Non-Steel Metal if you’re Using One Pre-Heat Both Metal Surfaces with your Heating Unit Wipe an Acid-Based Flux onto the Steel Surface 125 are also available which are suitable for bronze welding and components requiring extended heating cycles, low silver or copper-based brazing filler metals. 6 contains an addition of elemental boron which improves filler metal wetting on refractory metals and difficult to wet materials such as tungsten carbide and PCD. They can be used on copper, copper alloys, carbon steel and stainless steel. Soft solder fluxes are available in forms with both corrosive and intermediate/low corrosivity residues. EASY-FLO™ flux powder has excellent flux pick-up onto warm brazing rod when using the hot rodding technique. They are available in both paste and powder form and with varying working range, activity and overheat resistance and can be supplied according to Rolls-Royce (MSRR 9500) specification. They can be used on the common engineering metals including copper, copper alloys (brass, bronze, nickel silver, copper nickel), nickel alloys, steel, stainless steel and tungsten carbide. ALU-FLO brazing fluxes are chloride and fluoride-based, designed for low-temperature aluminium brazing in air.ĮASY-FLO are general-purpose silver brazing fluxes.
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