what wire to use

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I am new to wire welding and dont know what wire to use. I have to cut off the 5 th wheel of a trailer and build a new one i will be using a miller wire feed ran off a sa-200 some of the welding will be on 1/2 plate and i will be using flux core. will 045 be big enough or do i need 1/16 and what kind of wire .  thanks
Reply:I've always had very good luck with Hobart's Fabshield 21-B. I'd go with 1/16” wire. Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:1/8" and 5/32" 7018.
Reply:you can get away with .045 with multiple passes if necessary. thats a rather ambitious project for someone new to a process... can  you stick weld?- Christian M.C3 Welding & Fabrication - CNC Plasma Cutting-Mobile Welding-Custom welding and fabwww.c3welding.com
Reply:yes i can stick and will do some with 7018 and 10018 but some will be wire. the guys at my welding shop said  nr-211 mp 045 but that seams to small. i have ran a mig some but not a lot. i have it set up for 1/16 right now there is going to be a lot of welding because i have to cut about four feet of the frame off and replace it
Reply:Here is some .045” NR-212 on 1/4” flatbar. Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:that is a very good looking weld, what heat and wire speed were you running
Reply:CEP is right about the Fabshield 21B, 1/16" preferably for something like that.Ever since he told me about that wire I have never wanted to touch anything else.Sent from my GT-P3113 using TapatalkTOO MANY TOOLS & NO MORE SPACE
Reply:I ran those years ago so I have no idea. I ran both of them with a 1966 SA-200. I generally just turn dials until I get the results I want. You do realize if you run 1/16” self shielded wire you will need a flux core gun? .045” you might get away with using a regular Mig gun.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Here is some .068” NR-211 I ran with my V350-Pro, and LN-25. Now this was flat. Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:How's about some ESAB Core Shield 8.. in .072 dia self shieldI am currently running Outershield in .045 but that is dual shieldand i could not use it in the dang shifty wind so i ran ESAB Acclaim 7018 in 3/16...Nice stuffBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:.072” Core Shield 8 would really be pushing his SA-200. Plus he would need a CV box.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Sorry i keep forgetting that lincoln's have Limits... LOL I keep getting a idea about if i go that route i am going to get a 12 VS with the Flux cored gun just to run the 072 and other self shield wiresI am limited to 062 because of i run a bernard Q 300 off my 12 RCGot to beat feet ...got a job to do todayBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:I have a pro fax 350 amp flux core gun i will be using. i will use stick on most of it but wanted to use wire on some of  it to but i didnt know what wire to use.    thanks  for all your help.  thats why this site is so great because people like you guys take the time to help others    thanks again.