Quote:
Originally Posted by FrankJ
In terms of the elevator masts 6063 has the same stiffness as 6061. I don't thing you will come close to the yield strength of either. Of course some one somewhere will be the exception. 
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I was wondering if anyone else had done any sort of loading calculation to see if the 6061 vs 6063 really mattered for most applications. Unless you are skeletonizing your tubing and using terrible fastening practices, I don't think most of us are going to come close to the yield stress.