Original Posted By: leonstefanhutks(at)webtv.net (Leon Stefan)
"walter evans" There was a pretty in depth discussion awhile back about cutting 4130 with acutoff wheel. You have to be really careful , that if the cut edges getreal hot , the quick heat and quick cooling by the nearby steel, makes forbrittleness. you can't see it but at some time it will crack. I think that if the piece is going to be welded later , it doesn't matter,it will be normalized in the welding process. But if not, I think theoldtimers test the area with a small file. If you can drag the file overthe edge and it bites and cuts, its ok. But if it skips over it, its nogood and must be normalized.Check the old posts, some guys had some really good scientific data onthis subject.walt-----------------------------------------------------________________________________________________________________________________