Hi Guys, Once in a blue moon welder here. I made two brackets with 3/16" x 1-1/2" angle iron. All went well, I drilled some holes and checked fit, then when I went to drill the holes larger, it seems like the iron is hardened and I can't drill it. I did water cool it after welding, but it seems like my first set of holes drilled ok. When I went to redrill, it was to hard to drill. I tried heating the whole thing up to dull cherry red and let it cool slow, but I still can't drill my holes larger. What is going on? I need to know before the next blue moon :-)
MikeK