I'm working on a project at work where I'm welding a 3/4" plate to a piece of rec tubing that is 3/16" wall. I have to build the weld quite a ways out, and have been using a 3/16" rod on the flat stuff with pretty good results. I've tried 3/16" 7018 on the vertical and overhead stuff, but the puddle keeps blowing out. I've tried all kinds of head settings with the same results. Both pieces are preheated before I weld. I can get beautiful welds with the 1/8" rod in any position, but the bigger rod is acting like a beast. Any suggestions? Is the larger rod just for really, really thick metal? Thanks!
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SMAW big rod uphill problem