AR500 Steel Plate (500 BHN)

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We are in the process of building feed liners, the plates we are using are 45x 48x2", very heavy. Problem: magnatisim, so strong the framing square was pulled to the plate. The first corner we started tacking with 7018 and NR-211MP  blew back like a volcano, boiled out and sounded really bad. It did not stick on the outside but did run good on the inside. Everyone had a suggestion ( wrap the ground lead around the chute, different rods and wire) even had one guy say turn the thing to the north. lol. We tried 7018, nr-211 on the outside, finally got a few good passes on the inside with the 5/64 NR-211MP, enough to grab the thing and put it on its side. Monday we start the long runs flat. Any ideas? How do you de-mag the piece or how do you compensate for it?Some things can't be carried in a tool bucket.
Reply:Try welding it on A/C
Reply:The multi-million dollar operation I work for does not have an ac machine. Can ya believe it? But they want it done.Some things can't be carried in a tool bucket.
Reply:AsarcoSome things can't be carried in a tool bucket.
Reply:I replaced the liners in some saw dust feed augers and we used AR500 also. I welded about 600' it and never anything like that. I used 7018. I would also recomend AC in your case it might help. Steel Thunder Welding LLC. St. Thomas VI USAMM350PBOBCAT 3MAXSTAR 150 STH375 EXTREME PLASMA6.5 HP COMPRESORDEWALT 18, 24, AND 36 VOLTO/A TORCH SETAND SO MUCH MORE I DONT REMEMBERALL IN MY 2005 2500HD EXTENDED CAB L/B
Reply:kcnaz, i feel your pain. i work on top of a 1/2x1/2 square mile magnetic field. everything is magnatized. i have tried it all. ac 6010 seems to run the best. i tried 309 but when the molten pool gets some of the base metal in it, the field blows the weld right out onto the floor. i am looking at trying to take my vs12 to the plant. the theory is the .035 wire will have alot less mag pull and the feeder will be forcing the wire into the weld. we'll see."Retreat hell, were just fighting in the other direction"Miller Trailblazer 302, Extreme 12 VS, Dimension 400, Spectrum 375, HF 251D-1, Milermatic 251 w/ spoolgun  Hypertherm 1000Lincoln sp 1702000 F-450 to haul it
Reply:Your company might have to bite the bullet and rent a welder that does A/C. Steel can be demagnetized but that's done with A/C current also. Depending on the size of the pieces and the welding current used welding them with A/C current may de mag the parts.
Reply:Originally Posted by kcnazWe are in the process of building feed liners, the plates we are using are 45x 48x2", very heavy. Problem: magnatisim, so strong the framing square was pulled to the plate. The first corner we started tacking with 7018 and NR-211MP  blew back like a volcano, boiled out and sounded really bad. It did not stick on the outside but did run good on the inside. Everyone had a suggestion ( wrap the ground lead around the chute, different rods and wire) even had one guy say turn the thing to the north. lol. We tried 7018, nr-211 on the outside, finally got a few good passes on the inside with the 5/64 NR-211MP, enough to grab the thing and put it on its side. Monday we start the long runs flat. Any ideas? How do you de-mag the piece or how do you compensate for it?
Reply:Take your regular extention cord (AC running through it) , wrap it around the work piece. Put a constant load on it such as a fridge, crock pot, coffee pot, or something simaler. Let it do it's thing for about an hour, you should be good to go.Disclaimer; "I am just an a$$hole welder, don't take it personally ."
Reply:William you're mixing apples and oranges again. How is he bipolorizing several times a second with straight DC. If he was he wouldn't be having problems with arc blow. He is in very little danger of having a 45X48X2 piece of AR500 float around.
Reply:Originally Posted by TozziWeldingTake your regular extention cord (AC running through it) , wrap it around the work piece. Put a constant load on it such as a fridge, crock pot, coffee pot, or something simaler. Let it do it's thing for about an hour, you should be good to go.
Reply:Originally Posted by tresiWilliam you're mixing apples and oranges again. How is he bipolorizing several times a second with straight DC. If he was he wouldn't be having problems with arc blow. He is in very little danger of having a 45X48X2 piece of AR500 float around.
Reply:This is the monster, we have 4 of these to build. You may be able to see the corner, we have a 3/4x3/4 weld called for. NO WELD ON THE INSIDE!!! This chute will get an 8" lip set at a 45 degree 3" from the top to hold it in place. We were told today to fit everything together and then start welding.....so I plan on wraping mine with the power cord while I am fitting. YA think a fan drawing on the extension cord will calm this thing down? My partner is sold on a root of NR-211MP----I am not as it has been cracking on him. I fit and he welds for now. I wrote Linclon and they stand fast with a thickness limit of 1/2 inch with the NR-211. ""Thank you for your inquiry through our website. We know that you have a choice when selecting welding products and we are glad you have chosen Lincoln Electric®.The max. plate thickness is for the thickest member for all type of joints and all positions."" Supervision is calling for us to weld this thing with Tri-Mark TM-44Thanks guys............Some things can't be carried in a tool bucket.
Reply:If you get a practice piece I would try this with 7018 rod. It has worked well for me. Put all the heat into the side that is not showing an edge to the root. Just make believe you are practicing laying beads on a flat plate. Keep the rod pretty straight. A slight push angle. Pull up, to smooth out the bead and flatten it a bit, this will wash the top plate into the weld. Move the rod closer and then lift up again. Look at the angle of the rod in the picture, it is showing all the heat going to the one plate that is showing no edge to the root. This will pull the other plate into it. And it should not crack. You can actually hold the rod almost straight up, but I don't have the courage. I always aim it in a bit. Afraid I won't catch the other plate. But is always does. This obviously is not going to give you a lot of weld, however it will bond the root very well. And very hot. You should have a perfect practice bead that just catches the top plates edge. I would repeat that one more time before I just started to fill it up.        Sincerely,             William McCormick
Reply:Bill dont start your crap again please. We all know how smart you are and how dumb we are so there is no need to tell us again. By the way if the CRT is so misunderstood how do those retarded collage people get all those TV's to work so well? Just a thought. PS. I am waiting on you to build me a motor that powers itself so I can give you my buisness. Steel Thunder Welding LLC. St. Thomas VI USAMM350PBOBCAT 3MAXSTAR 150 STH375 EXTREME PLASMA6.5 HP COMPRESORDEWALT 18, 24, AND 36 VOLTO/A TORCH SETAND SO MUCH MORE I DONT REMEMBERALL IN MY 2005 2500HD EXTENDED CAB L/B
Reply:Originally Posted by offrdfun73Bill dont start your crap again please. We all know how smart you are and how dumb we are so there is no need to tell us again. By the way if the CRT is so misunderstood how do those retarded collage people get all those TV's to work so well? Just a thought. PS. I am waiting on you to build me a motor that powers itself so I can give you my buisness.
Reply:I think if you can get a good root pass, then the arc blow might dissapear . a HEAVY ground cable and clamp  AT each end of the weldment might help. and a root pass with A C rod, 6011 or 7014  might work. As everybody , even wild willy , knows ,you gotta get ridda that dam arc blow. sometimes just welding the opposite direction does the trick, but you've tried that already. Right ?[SIZE="5"Yardbird"
Reply:Yep tried welding both directions. The piece I am going to start on as soon as we get them fit up is wraped and a fan is pulling current around it as we speak. Ran all day and the piece still grabs my pocket ruler.......Some things can't be carried in a tool bucket.
Reply:Originally Posted by kcnazYep tried welding both directions. The piece I am going to start on as soon as we get them fit up is wraped and a fan is pulling current around it as we speak. Ran all day and the piece still grabs my pocket ruler.......
Reply:We finished the liners with Fabshield -21 3/32 wire. The heat or ampreage pushed the magnetism out on the root pass. I welded all the pieces together, these things warped, pulled and cracked. I preheated and wraped em to let them slow cool......they were monsters of their own will.Some things can't be carried in a tool bucket.