Need to know if this plate/weld is going to brake

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I welded  2 pieces of 1 1/4 by 36" solid square to a 1/2 inch by 36" plate, found out that the plate bent, I dont know if that happened cause I did 3 weld pases on 2 sides of the sqaure but please see the pictures and let me know how I failed or if the plate could brake, since the whole piece will mount on a big caterpillar loader that has lots of bivration. thank you. Attached Images
Reply:Look good aesthetically.What were your settings for heat input?And I'd be running the heat as high as I could handle.1981 Lincoln SA 200Miller Trailblazer 302gMiller 211 Mig Welder w/ AutosetI'm learning to stick metal together
Reply:i would seal weld it.
Reply:If these are going to hold the oil and filtering media its self, then you should test for leaks with diesel. Just get a little bit of diesel and swirl it around the bottom and let it sit a bit then check for leaks.
Reply:Originally Posted by gto_welder01i would seal weld it.
Reply:It looks good from what  can see.  It should warp a little.David
Reply:Yea i agree, it is going to warp no matter what. As long as you keep the warping to a min. you will be ok.Ya gotta spend money to make money!
Reply:I think to get the full strength the fillet would require the legs to be equal to the thickness of the thinner of the two, which is the 1/2" in this case.  So 1/2" x 1/2" slightly crowned, and as mentioned above, all the way around, not only on the sides.A fit like this is going to warp.  There are ways to minimize it, but was that important?WIll it hold?  Who can say.  By looking at your picture I'd say I could break it out by clamping that square bar firmly then twisting the 1/2" plate up&down.  It'll take some force you know.  The fillet size, penetration, filler type, etc, will determine how much force. lol   Looking at the weld from your top view makes me feel like it would break fairly easy.  The fillet size looks very small in that picture. Much smaller than it looks in your side view.  But I don't haft to break the weld, all I haft to do is break it off of that square bar, which based on that top view,  looks possible to me. good luck manLast edited by slowhand; 01-17-2011 at 06:21 PM.
Reply:I would wrap the corners top and bottom
Reply:Good rule of thumb is your weld size should be no smaller than your thinnest basemetal your joining...
Reply:Cant see very well, but it looks like your toes are not wet out very well indicating a cold weld.  It was welded on with solid wire in a single or triple pass? I also doubt there was any preheat and that 1 1/4" is acting as a huge heat sink.What kind of forces are going to be acting on it in service, in other words what exactly is the purpose of the square stock?In any case, I would be suspicious of it at the least.Have we all gone mad?
Reply:Yea I would make those fillets about 5/8 but grind down the one on the right and redo it because it looks like you ran the second bead below the toe of the root pass putting to much into the main plate and not enough into the face of the root weld.
Reply:Looks cold to me. The pictured end view of the sq stock show little penetration coloration. The sq stock should have been beveled and pre heated before welding. I would thru drill and bolt for added security.Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:If you are asking if the 1/2" plate is going to break because it is warped, then no it is not. Can't give advice on the rest until you post up some more info on the application.Millermatic 200Hobart Handler 120Victor O/A & Ramco BandsawLincoln 225 ACSnapOn AD HoodMiller XMT304/22AHypertherm Powermax 1650 G3Lincoln Idealarc DC600 w/Extreme 12 VSMiller Digital Elite "Joker"