316L filler on 304L?

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Hey guys - I have a bunch of 316L that I had picked up when I was doing a project with a 316L plate.Is there any reason I couldn't use 316L for some 304 to mild?  I do have 309L but only in 0.035 - 0.045" while I have 316L in 1/16" which would be more appropriate for this project.ThanksJonMiller Diversion 180Hobart Handler 140 (Soon to be replaced with Miller 211?)Miller Spectrum 625 Extreme
Reply:No problem.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:You could use it but if this is any type of load bearing application avoid it.You will get some martensite in the weld which will make it brittle.
Reply:Originally Posted by taz00You could use it but if this is any type of load bearing application avoid it.You will get some martensite in the weld which will make it brittle.
Reply:Originally Posted by shovelonGood catch. Is that because of the added molybdenum? I use 316L to prevent hot cracking which I get much more of with 309.
Reply:For exhausts, you should really use the 309L. The 309 has extra nickel and chrome to resist corrosion in the zone where the weld mixes with the base metal. That's why it is recommended for welding stainless to mild.The moly makes 316 good for resisting corrosion due to salt water, but will do you no good in a car exhaust. It might be OK for a git-r-done repair but not if you want it to last.JohnA few weldersA lot of hammersA whole lot of C-clamps
Reply:How about using 308 on 316?  I had accidently welded an exhaust system built out of 316 with 308 stick. Any worries?
Reply:Originally Posted by boatwelderHow about using 308 on 316?  I had accidently welded an exhaust system built out of 316 with 308 stick. Any worries?
Reply:Originally Posted by shovelonGood catch. Is that because of the added molybdenum? I use 316L to prevent hot cracking which I get much more of with 309.
Reply:Originally Posted by taz00If you are interested, do some search on Schaeffler's diagram. You will find a lot of answers for this and other applications.
Reply:I guess I need to pick up some 309 in the right size grrr it never ends lolMiller Diversion 180Hobart Handler 140 (Soon to be replaced with Miller 211?)Miller Spectrum 625 Extreme
Reply:About the only time I ever use 316L  is when its food oriented......Or maybe an Acid tank....  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:I like 312 myself but its kinda spendy.Lincolin Power Wave 450, Lincoln Powermig 255, Lincoln Pro Mig 140, Lincoln Squarewave Tig 275, Miller Big 40 G(with Hobart Hefty suitcase), Thermal Arc 95S and Esab PCM875 in an already full machine shop.
Reply:312 is good for some dissimilar metals, but not where high temperatures are encountered. Not the best thing for exhausts, IMHO.JohnA few weldersA lot of hammersA whole lot of C-clamps
Reply:Originally Posted by Silicon-basedFor exhausts, you should really use the 309L. The 309 has extra nickel and chrome to resist corrosion in the zone where the weld mixes with the base metal. That's why it is recommended for welding stainless to mild.The moly makes 316 good for resisting corrosion due to salt water, but will do you no good in a car exhaust. It might be OK for a git-r-done repair but not if you want it to last.John
Reply:Originally Posted by MikeGyverYou're saying use 309 for mild steel exhaust?Is it a problem if the weld rusts just as fast as the rest of the pipe?I'd use er70s-2...If the exhaust is 304 then use 308 filler.
Reply:Originally Posted by OscarJonK is asking about 304 to mild.  Nothing wrong with 309L is there?
Reply:Originally Posted by shovelonI think you are right on this.
Reply:I use 316L for all my stainless work.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720