FRODO, Posted June 14, 2015 Share Posted June 14, 2015 can i get some info on the correct flux solider to use to join ss and copper?and procedure, will 15% silfloss work? flux? Quote Link to comment Share on other sites More sharing options...
Frosty Posted June 14, 2015 Share Posted June 14, 2015 Welding product manufacturers provide this information on their web sites in specific detail. When you ask specific technical questions like this on an open forum you'll certainly get answers you can take to the bank. Unfortunately you'll get a raft of answers from folk who want to be helpful but don't know solder from solitaire. The manufacturers provide this information for folk so their products perform successfully as often as humanly possible. Some provide instructional videos as well.Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
FRODO, Posted June 14, 2015 Author Share Posted June 14, 2015 I did that, Harris product group stay brite solider with stay clean flux Quote Link to comment Share on other sites More sharing options...
arftist Posted June 14, 2015 Share Posted June 14, 2015 Any silver solder will work, even stay brite, which is only .6% silver IIRC, Choosing the correct solder more depends upon application. How much pressure will your system develop? 40% silver is good for 3000 psi. when joint clearance is held to .002" or less. Stay brite is good for 300 psi if applied properly. When soldering stainless steel a strong acid flux is required (even if you use sil-fos) Sil-fos and stayclean would be a better choice in general for stainless. The higher percentage of silver in sil-fos vs stay brite make for an easier flowing solder. To be clear; stay brite would allow one to actually solder whereas higher silver content alloys enter the temperature range of brazing. The difference can be significant depending upon your product's end use. The more information you can provide, the better answer can be given. Quote Link to comment Share on other sites More sharing options...
Alan Evans Posted June 14, 2015 Share Posted June 14, 2015 (edited) I hope the Harris stuff works out for you.I have had problems getting silver solder to stick to the stainless. This was years ago with a college project before I had access to welding facilities. The joint was under a slight tension and the thing would ping off every now and then, sometimes a couple of years between pings!I have tig welded sulphur bronze and 316L stainless together and that does not to appear to have deteriorated in any way in an indoor environment over 10 years.Alanp.s. Having now seen Arftists post, my experience with soldering stainless was I think the old cadmium containing Easi-Flo solder and flux by Johnson Matthey. Edited June 14, 2015 by Alan Evans Quote Link to comment Share on other sites More sharing options...
FRODO, Posted June 14, 2015 Author Share Posted June 14, 2015 I am working on a SS vessal, and am attaching a male adapter to the side of it, my best bet, is to drill the hole same size s the thread,,screw it into the tank.and solder the shoulder and thread to the tank.low pressure steam/ actually vapor Quote Link to comment Share on other sites More sharing options...
ianinsa Posted June 14, 2015 Share Posted June 14, 2015 (edited) I know this may sound daft, but sticking on a s/s nipple and tig welding would be the way to go? Edited June 14, 2015 by ianinsa Quote Link to comment Share on other sites More sharing options...
FRODO, Posted June 14, 2015 Author Share Posted June 14, 2015 OH yes it would, you are not daft, I have a torch but not a tig welderI have a copper adapter but not a SS coupling.. ,,tig cost money, soldiering does not, I am cheap!! Quote Link to comment Share on other sites More sharing options...
ianinsa Posted June 14, 2015 Share Posted June 14, 2015 I am a blacksmith and therefore by nature cheap....er frugal. s/s fittings are relatively inexpensive and small inverter type welders are very inexpensive . Typically guys don't want unknown Chinese brands and want expensive blue jobs, guess what those Chinese fellas actually know what they are about just like they are with the induction heaters. Just buy a cheap inverter welder and add a torch and I don't think you'll ever regret it. Faulty jobs cost more than one imagines.Alternatively have you looked at using a male nipple with a nut either side and two velemoid gaskets (cheap, cheerful and effective) what more could you want ? Quote Link to comment Share on other sites More sharing options...
ianinsa Posted June 14, 2015 Share Posted June 14, 2015 Just saw your introduction post, plumber huh, ok so I was trying to teach grandma to suck eggs ! Quote Link to comment Share on other sites More sharing options...
FRODO, Posted June 14, 2015 Author Share Posted June 14, 2015 (edited) grandma likes eggs,,,no gaskets inside tank,,cross contamination.has to be a ss weld or soldered connection. only material besides ss or copper is teflon tape ptfess to ss soldering works as long as you tin.the ss first, if you do not tin,,,it wont sticki have a torch, and a small craftsman wire feed cracker jack box,,never have tigged, never tried it Edited June 14, 2015 by FRODO, Quote Link to comment Share on other sites More sharing options...
ianinsa Posted June 14, 2015 Share Posted June 14, 2015 My brother has his own plumbing business and operates from here too. He has a major supermarket chain that wants him to do all their soil and waste pipes in multi-story stores in welded s/s. Big money work, not many plumbers geared for it. we have Bensomatic type torches but have never tried to solder s/s . I saw the guys in Cairo solder s/s shishas with solder irons using urine as a flux(made me glad to be a non smoker) You have got to try this tig thing it's a winner! I have a number of large machines but for s/s the small inverter units are the way to go! Quote Link to comment Share on other sites More sharing options...
FRODO, Posted June 14, 2015 Author Share Posted June 14, 2015 I guess, i will have to invest in a ergon bottle and a regulatormust places want ss [process piping] only when they have a product going thru it.$$$$$$$ Quote Link to comment Share on other sites More sharing options...
the other dave Posted June 27, 2015 Share Posted June 27, 2015 They do make ss rods for arc welding. Just remember to go up a number in the rod when welding, that is, if you're welding 316ss, use a minimum 317ss rod. Using the same number rod will allow carbon migration and acid corrosion at the joint. Quote Link to comment Share on other sites More sharing options...
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