welding rods for stainless

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Im not sure what kind of welding rod you should use for stainless. Ive welded stainless before but didnt pay attention to what kind of rod i was using. I have a Lincoln Idealarc 250 its a somewhat newer version of the Idealarc 250 i was using to weld stainless.Thanks.
Reply:i use un-308L-16 can get at tractor sup.northern tools and ace hardwareLast edited by ed mac; 02-02-2010 at 09:05 AM.
Reply:It's all dependent upon which grade of stainless you're welding.
Reply:meathead,As Supe said, it depends on what alloy of stainless you are trying to weld.For 'standard' 304 grade stainless, 308 filler is used.More info?  Try this document as a start  http://content.lincolnelectric.com/p...ature/c610.pdfThere are other documents too.  Like this one  http://content.lincolnelectric.com/p...ure/c64000.pdf  The best laid schemes ... Gang oft agley ...
Reply:90% of stainless in the world is 300 series. among the 300 series 308 will work favourably with nearly all the grades and stainless to mild steel welding.308L is the go to rod unless you know  100% your corrosion conditions that cause you to use something better than 308
Reply:Originally Posted by ed maci use un-308L-16 can get at tractor sup.northern tools and ace hardware
Reply:Originally Posted by meathead101Im not sure what kind of welding rod you should use for stainless. Ive welded stainless before but didnt pay attention to what kind of rod i was using. I have a Lincoln Idealarc 250 its a somewhat newer version of the Idealarc 250 i was using to weld stainless.Thanks.
Reply:The answer is easy, 309L.  309L will join most stainless to stainless joints as well as join mild steel to stanless and it even works for welding cast iron.  If you know the composition of the stainless steels being welded, then yes 308L could be used for joining 304, 316L should be used for joining 316.  You can potentially safe a few dollars using 308L on 304 and 316L gives better corrosion resistance in it's applicatoin but 309L typically works well enough in most applications.
Reply:The rail guys at work use 309L-16 for joining switch gear to tracks and H sections.
Reply:Originally Posted by 76GMC1500The answer is easy, 309L.  309L will join most stainless to stainless joints as well as join mild steel to stanless and it even works for welding cast iron.  If you know the composition of the stainless steels being welded, then yes 308L could be used for joining 304, 316L should be used for joining 316.  You can potentially safe a few dollars using 308L on 304 and 316L gives better corrosion resistance in it's applicatoin but 309L typically works well enough in most applications.
Reply:Know your base material before you choose a rod.  If that information is not available, take a magnet to your source, and confirm if it is magnetic.  If it is, you can basically follow what others have previously posted, however, if it non-magnetic, that would indicate your dealing with a 400 series stainless, and you must adjust your rod accordingly.