Reply to "Learning to TIG aluminum"

accobraMember

Saturday I TIG'd a transmittion case for a HARLEY and yes it makes for a better job to preheat Aluminum. The reason is if you do not preheat the material around the weld, the material when welded, losses it strenght by as much as 40%. If you preheat you could actually strenghten the area and the weld which is usually WEAKER then the area around it.( Unlike steel where the weld is usually stronger, not aluminum. Aluminum weld is usually weeker thenm the area around it.) So if you desire strength ... preheat the area around 400 degrees. A simple propane torch very lightly.

3/2/067:12 PM

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