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05.20.2008, 03:33 PM
6061 will be pretty easy to work with and fairly cheap. For a chassis, I'd go with the 0.16" max thickness. 1/4" is just crazy!
7075 will be harder to work with, and you won't need 1/4" - I'd say 0.125" (3.175mm).
Not sure about 7475-O
I assume the 6061 and 7075 are T6?
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