DAN INA GLANDT wrote: > What are your thoughts on the need to have an engine mount of 4130 that > has been TIG welded normalized?
I took a 4130 welding class given by Wyatt Swaim, "Mr. TIG". He pioneered the welding of 4130 aircraft tubing back in the early Skunkworks days, and even helped write the specs. One of the things he taught us in the class is that there's no need to normalize thin wall 4130 tubing, or any 4130 that's less than 1/8" thick or so, after weldiing. He's done a lot of coupon testing that proves his point. See more details about welding 4130 at http://home.hiwaay.net/~langford/sportair/ ... Mark Langford N56ML "at" hiwaay.net website at http://www.N56ML.com --------------------------------------------------------
