stainless tig - I want to do this

admin

I'm new to this forum and new to TIG and I want to do the following. Attach a 0.25 316 stainless ring to a piece of 0.065 316 stainless tubing. The attached photos will help. The ID of the ring is reasonably close to the OD of the tube but there can be a slight gap to fill. I don't need to run a bead all the way around - 4 half inch beads will be fine. The bead wamnts to be in the the groove - not fat. I know the Canadian dollar is shrinking but you get the idea of scale. I have an ArcMaster 185 ac/dc and am wondering if the folks on this forum could give me an idea of setting, filler diameter and electrode diameter they'd start out with. Thanks. Attached Images
Reply:What's wrong with the bead you have there?
Reply:i agree the weld looks good to me.
Reply:I also think that looks fine. But, if I understand your question, you want a 'fatter' bead. In TIG, the filler size helps determine bead size. Use a larger dia. filler. Since I TIG for pretty and not strength (sometimes), I like the smaller beads.You could also weave a second pass.9-11-2001......We Will Never ForgetRetired desk jockey. Hobby weldor with a little training. Craftsman O/A---Flat, Vert, Ovhd, Horz. Miller Syncrowave 250
Reply:My guess is he wants to weld the ring above the one that's already welded. And that's a penny not a dollar.
Reply:I apologize, I should have been more clear. I want to be able to lay down a bead that looks like the one in the picture. I did not do the welding in the picture. That was done by somebody else. Mine looks like a blob about the size of a pea.I'm thinking I need smaller filler and electrodes and would like some suggestions. I'm assuming small diameter but how small? I tried 1/16 ceriated and 1/16 316 filler but they seem kind of big to get into a fairly narrow joint and gave me the above mentioned blob. I also need some thoughts on settings because I'm new at this and realize I could mess around for weeks or ask some folks that know. I'd tell you what I tried but I was changing things so often I don't really know.Thanks and sorry for my confusion.
Reply:You can get by with 1/16" filler or even maybe 3/32".Just me but I might try to fuse it with no filler. Since it appears the ring may not be good and flush you may not be able to fuse.It almost looks that the weld in the pic might be fused.As far as electode? 1/16" or a sharp 3/32".  I mostly use 3/32" when a lot of folks use 1/16"  thats just me.Good luck show us a pic later weld it like you own it
Reply:Originally Posted by Sparky8370And that's a penny not a dollar.
Reply:Pics, we need pics. Of your welds. When you get that pea sized bead, pedal up; and blend it into the joint.Be careful to keep the heat on the .25 ring, that .065 will be glad to burn through on you. 9-11-2001......We Will Never ForgetRetired desk jockey. Hobby weldor with a little training. Craftsman O/A---Flat, Vert, Ovhd, Horz. Miller Syncrowave 250
Reply:Per the photo and description:I am guessing I would start out using 1/16” tungsten, a foot pedal with machine set to 50 amps max. Probably use 1/16” dia. 316L filler. Start out using a #6 cup or so, keep heat on the ¼” ring and establish a puddle, add rod to wash the puddle into the 065” material and walk the cup as far as you want. It appears you could make a smaller bead with a lot less effort and filler than pictured.The only problem you should have welding this as pictured is to keep from overheating and burning through the 065” wall tube. The inside of the 065” wall tube is going to oxidize and turn crispy black unless you keep it purged.Hope this helps.
Reply:You will need a industrial grade TIG welding machine if you want to really have that much control. Experience and how much welding you have done matters also.Talk to that welder that made that weld in the photo and see what they tell you.AWS certified welding inspectorAWS certified welder
Reply:Thank you all for the suggestions and recommendations. I will pursue and get back with progress and further questions.
Reply:Donald Branscom,Would you care to explain to me why he needs an "industrial tig machine" to weld that ring on.Are you implying that he needs something like a Sync 250, which, I think is rated as an "industrial machine"?JFYI:  The TA185 he already has, has a lot more "adjustability" than the Sync you have.  It also has plenty of HP for the task at hand.rbarby,You've gotten some good advice here.  (Some not so good).Personally, I'd use a 1/16" Thoriated tungsten, 1/16" 316L filler, and set the HZ at about 120, amps at about 60.  Keep the heat on the ring to minimize potential burnthru.If the inside appearance of the tube is important, you'll want to purge it with 100% Argon to prevent sugaring.  (Mostly the same guidance as given above)Good LuckSyncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:This Chart is for the TA185http://www.aceengineering.ca/Temp/TIGWeldingChart.pdfConrad Turbo (Hobart & Miller member) put this together and uses the same reference scale as you doand some info from Millerhttp://www.millerwelds.com/education...rticles30.htmlLast edited by Broccoli1; 10-22-2008 at 04:40 PM.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:Originally Posted by rbarbyI apologize, I should have been more clear. I want to be able to lay down a bead that looks like the one in the picture. I did not do the welding in the picture. That was done by somebody else. Mine looks like a blob about the size of a pea.I'm thinking I need smaller filler and electrodes and would like some suggestions. I'm assuming small diameter but how small? I tried 1/16 ceriated and 1/16 316 filler but they seem kind of big to get into a fairly narrow joint and gave me the above mentioned blob. I also need some thoughts on settings because I'm new at this and realize I could mess around for weeks or ask some folks that know. I'd tell you what I tried but I was changing things so often I don't really know.Thanks and sorry for my confusion.
Reply:Just saw SundownIII post, I pretty much am seconding his opion , yep 316 L fillerBrettA good guess is better than a bad measurement
Reply:Again, thank you for suggestions and recommendations. Things are getting a little busy for the next few days so it may be a while before I can get back to practice but I do have one other question.I picked up some stainless scrap from one of the local shops with the idea of using it for practice. They could not tell me what was 304 and what was 316. My question: For the purpose of practice, will I have a problem using 316 filler on 304? If it will make a difference, I can buy some 304 filler but then I'll need to know when to switch filler. Will it be obvious that I have the wrong filler? I hope I made that clear. And thank you again for the time taken to answer my questions.
Reply:Youll be fine. we only keep in stock 316 filler so  we dont use 304 accidentally for external . But when we are tigging 304 we use 316 filler with no dramas.A good guess is better than a bad measurement