Welding Rebar

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What kind of steel is re-bar made out of?  Need to weld some.
Reply:6011 works great
Reply:There are quite a number of different grades/ranges of rebar, some more easily welded than others. Some is even made to be weldable. If you don't know what you've got, treat it like a high carbon.
Reply:Look in the Lincoln procedure handbook for arc welding, there IS a procedure for rebar.  It aint plain ol mild steel.David Real world weldin.  When I grow up I want to be a tig weldor.
Reply:I was hoping to mig the stuff.  I've got mild steel wire, or I've got flux cored stuff that came with my machine.  sounds like I'd be better off stick welding it though.
Reply:Depends on what you're hoping to do with it. If it's just doodads around the house I doubt if it matters a lot. Flux core will be your worst choice.
Reply:these are what I'm trying to do.  Was going to cut the rebar and weld the ends for better hammering performance instead of just bending them.  Flux core.  I haven't even used it yet, but I'm going to have to try it at some point.  It can supposedly do thicker than gas with one pass.  I'm not psyched about stick welding these things.  I've got a Invertec V205 that I use for stick and I haven't had the best luck with getting a good arc going on it.  then again this is probably a perfect project for it.  Under cut isn't a huge deal and appearance isn't either.http://www.stumbleupon.com/toolbar/#...log-home-tools
Reply:mig is fine stick is fine flux core is fine. like others have said depends on what youre doing with it. all three of these processes have electrodes that are capable of doing what the others can do. personal preference really. but if its just a little project and nothing you can get sued over, use whatever you feel most comfortable welding with.
Reply:Originally Posted by Nick Kentthese are what I'm trying to do.  Was going to cut the rebar and weld the ends for better hammering performance instead of just bending them.  Flux core.  I haven't even used it yet, but I'm going to have to try it at some point.  It can supposedly do thicker than gas with one pass.  I'm not psyched about stick welding these things.  I've got a Invertec V205 that I use for stick and I haven't had the best luck with getting a good arc going on it.  then again this is probably a perfect project for it.  Under cut isn't a huge deal and appearance isn't either.http://www.stumbleupon.com/toolbar/#...log-home-tools
Reply:Originally Posted by SandyDepends on what you're hoping to do with it. If it's just doodads around the house I doubt if it matters a lot. Flux core will be your worst choice.
Reply:One thing about it, when you go hammering on anything it's a pass or fail right there.   Flux core will be pretty brittle. I'd be inclined to wire wheel it then use E70S-6. But heck, it's not like you can't test it and come up with what works for you and the rebar you have.
Reply:Originally Posted by SandyOne thing about it, when you go hammering on anything it's a pass or fail right there.   Flux core will be pretty brittle. I'd be inclined to wire wheel it then use E70S-6. But heck, it's not like you can't test it and come up with what works for you and the rebar you have.
Reply:never knew flux core produced brittle welds...... wonder why its used in so many applications where ductility is a major concern. ill have to throw that one in the spank bank!
Reply:Originally Posted by JC'sWeldingJust for my knowledge, why would flux core be the worst choice?  Not doubting you at all, just want to learn.
Reply:have to follow proper procedures which will tell you electrode, preheat, postheat, joint type etc. that will eliminate or greatly reduce any chance of cracking or failure. just like a piece of cast iron, if you walk up and just start welding on it, chances are its going to crack. but if you walk up to it and follow proper welding procedures, then all should be ok.
Reply:I weld alot of it for tool holders around the shop and i just use regular steel wire for it. Its pretty soft stuff you don't need high heat it penetrates very well. =John
Reply:I think the welded pieces will work better than the bent rod.  More of a positive end to hammer into the log than just the bent rerod.  I will go with my mild steel mig wire.  I'll grind the welded area clean and preheat some with the oxy/act. torch. than just let it air cool.  If that doesn't hold up then I'll tig it.  What would be the best filler metal for tigging?
Reply:I think everybody's really overthinking this one .....   you could'a had your log cabin half done by now ...
Reply:You shouldn't need to preheat it at all. I've been welding 1" lately. holds my 200 lbs butt when i hang on them for a test.
Reply:Originally Posted by landmanYou shouldn't need to preheat it at all. I've been welding 1" lately. holds my 200 lbs butt when i hang on them for a test.
Reply:I just figured I'd get better penetration with pre heating.  I'm just running a Lincoln 180C.  I'm planning on using 5/8" rebar so I'll have the machine cranked.
Reply:Originally Posted by Nick KentWhat kind of steel is re-bar made out of?  Need to weld some.
Reply:Non-weldable rebar is weldable; it just doesn't meet code being welded for the purpose it is intended, which is burying in concrete.
Reply:yeah for crying out loud it is rebar! just weld it lol
Reply:I have actualy welded rebar column splices before. You can not use 7018 to weld rebar because of the particular make up of the metal in rebar...you have to use 8018 or better for it to retain the strength of the bars. 6011 is NOT ok if you are welding to any code. IN fact NO 60 series of wire is acceptable. A wire with at least an 80,000lbs rating is what you want in general. As far as I know and from what various inspectors(CWI's and Sr,CWI's) a 70 series is not acceptable for welding rebar an 80 series or better.'MikeI passed ALL my rebar cert's.   about 10 of em with NR-232.Regular A615 rebar is such a crap shoot when you weld it.  some is decent some is shat.  I had some that was so full of carbon pockets it wasn't even funny.  you could snap one out of every 5 welds on that junk.For what he's looking at doing it wouldn't be worth the pita factor for not getting weldable rebar.Vantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:Ok, I got a chance to pick at these today.  I ended up bending them as the guy I'm doing them for thought that would be cheaper.  Anyway, I need some advice as to how to go about getting a nice point on these things now that they are bent.  Grinding away at it with an angle grinder is not efficient.  For those of you with knowledge and proper tools, what would be the best way to get a point on these and keep them 90 degress to each other?  Thanks, Nick.  Oh, I'm doing style A.Linkhttp://www.stumbleupon.com/toolbar/#...log-home-tools
Reply:You could use a Hand Held belt sander.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:How long would the belt last?  I think I've only got 100 grit or maybe 80.  I thought a vertical band saw or a bench top belt/disc sander might work too.  Both of which I don't have.
Reply:Originally Posted by Nick KentHow long would the belt last?  I think I've only got 100 grit or maybe 80.  I thought a vertical band saw or a bench top belt/disc sander might work too.  Both of which I don't have.
Reply:Any other ideas?
Reply:i made this bottle with rebar welded with flux core mig Attached Images
Reply:Heat with a torch, beat flat, finish with a grinder.Tim Beeker.
Reply:Ahh yes, heat it and beat it!David Real world weldin.  When I grow up I want to be a tig weldor.
Reply:Got a big anvil?  Heat it, hammer it, dunk it in water like a blacksmith.  Then just sharpen the tips.
Reply:No, no big anvil.  I always forget about the blacksmithing option.
Reply:Originally Posted by JC'sWelding.  Then just sharpen the tips.