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Message: <blockquote data-quote="ntsqd" data-source="post: 27318" data-attributes="member: 222">Have a look at the penetration models for the two types of welding. I think you'll find that GTAW (TIG) results in better penetration than Oxy-Fuel. A two edged sword, the better penetration results in a consistantly better weld, but the much more concentrated heat required to do so results in the undesirable loss of Ductility until normalized.Then there is the cosmetic factor. GTAW beads are commonly much nicer to look at. At one time I could put down an Oxy-Fuel bead that looked very much like a slightly too wide GTAW bead but no longer. Takes a lot of practise and time to do that.TS"It only seems kinky the first time"-- Bumpersticker seen in Lost Wages</blockquote>