What self shielded wire for AR 400

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I'm welding  a plate of  AR 400 into the floor of an end dumpJust wanted to know what self shielded wire size and number I should use.It's all lap joint  with some big dents in the old floor  so there are some big holes to fill.Lincoln 350mpmiller regencymiller syncro wave 300
Reply:I like Hobart HB-21. Should do fine for that. At least 1/16" wire.
Reply:Weird this is from Lincoln Asia but it says use a low hydrogen consumable. Something like Lincoln NR232/NR233 would be a better choice because it's closer to 7018 stick rods. A little preheat so it's fairly warm to the touch is a good idea too.https://www.lincolnelectric.com/en-s...te-detail.aspxhttps://www.lincolnelectric.com/asse...2/c3200012.pdfLast edited by Welder Dave; 07-03-2021 at 11:00 PM.
Reply:I  haven't noticed any Hobart products in the welding supply stores locally. I think I'm limited to  esab praxair products  and blue shield.
Reply:

Originally Posted by bcguide

I  haven't noticed any Hobart products in the welding supply stores locally. I think I'm limited to  esab praxair products  and blue shield.
Reply:E71T-11 is kind of a general purpose wire and requires a lot of passes to meet the AWS specs. For AR400 I think E71-T8 is a much better choice. If you're using AR400 I would think most people would have an adequate machine to run 1/16".
Reply:I  think I am going to finish this job with 7018, with luck it will be done tomorrow.  Would  an .045 wire work? I don't usally weld a lot of thicker steel and think I would have more use for the smaller wire.Im using a miller regency with a 22a  wire feeder.Lincoln 350mpmiller regencymiller syncro wave 300
Reply:

Originally Posted by bcguide

I  think I am going to finish this job with 7018, with luck it will be done tomorrow.  Would  an .045 wire work? I don't usually weld a lot of thicker steel and think I would have more use for the smaller wire.Im using a miller regency with a 22a  wire feeder.
Reply:Great  thanks  gentlemen
Reply:Curious why the T-8 wire doesn't come in .045"? I think using the T-11 wire especially, preheat would be a good idea.
Reply:

Originally Posted by Welder Dave

Curious why the T-8 wire doesn't come in .045"? I think using the T-11 wire especially, preheat would be a good idea.
Reply:

Originally Posted by ttoks

I wonder the same thing, I'm thinking it's because generally anyone spending the money on a higher spec wire is usually doing so because they have to to meet some job spec or government requirements and they're going to have the equipment to run bigger wires, the home hobbiest with they're small machines probably won't buy enough T8 in .045 to justify the RnD and production capital to get it set up.I've ran into the same problem trying to find .035 dual shield.
Reply:if you haven't done the job at this time, look up Popeye an old miner.  He just finished a couple end dumps.
Reply:I wonder if the wire to flux ratio changes with using smaller than 1/16" (or .068") wire? That might be why they don't make some flux-core in smaller sizes.