Quote Originally Posted by Evolvo View Post
Do not cool with a wet rag, this will make the welds brittle. Let them air cool. It's a pain in the azz but thousands of tack welds will be best, IMHO.
Good luck,
Alan
i have to agree many many many tack welds all the way around till the tacks are connected. you can use an air hose and a blow gun to cool the welds. after you lay a tack then you can blow air over the weld and that will cool it with out that shock of cold water. hope that helps.