![]() On the inside corner, your welders will have a fillet joint that will tend to either burn through or not get good fusion into both tubes. Assume a weld heat or feed rate of 2 is used. (The 45 degree cut of both tubes is more important for your fitup!) Your first pass will completely fill the joint. 1/8 will be a bit easier to work with, but I'd worry much, much more about burning through and having to frequently "fill in" the hole rather than worry about the prep.Ī conventional 1/8 steel prep on the sides will have a 1/16 flat, then a 1/16 "bevel" - very difficult to machine accurately. Just fuse the two touching steel, working very hard not to burn through the wall. If you have 14 gage steel walls like I use for railing and frames, you can't really make any prep at all. ![]() Not real sure how you write a complete weld procedure for this joint: The sides are really just two simple thin piece of carbon steel, the inside is a tight 90 degree fillet, the outside corner is two flat pieces touching each other with a very, very thin sliver of steel at the extreme corner.ġx1x1/8 thick sq tubing is very thick, but you really don't have much metal there for any kind of "weld prep."
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