Does anyone have any good sources for 4130 at good prices? No matter where I get it from it will probably have to be shipped in since I live in west Kentucky where even mild steel has to be ordered in thin wall. :) I know of a few aircraft supply sources that sell it, but it is awfully expensive through them.
What about welded tubing vs. seamless? My mild steel frame is made with welded seam tubing. Wouldn't welded seam 4130 be a lot less expensive than seamless? Is there much difference in the strengths of the two? If I could find the right sources I was thinking of using seamless in the high stress areas and maybe welded seam tubing in other areas. I read somewhere that the two were compatible when welding.
Have a good one!