Quote:
Originally Posted by boingboing
It's aluminum. If you want me to be really specific, it's 7075-T6
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And yet more information: (I do love the Internet ...)
Aluminium alloy 7075 is an aluminium alloy, with zinc as the primary alloying element. It is strong, with a strength comparable to many steels, and has good fatigue strength and average machinability, but has less resistance to corrosion than many other Al alloys. Its relatively high cost limits its use to applications where cheaper alloys are not suitable.
T6 temper 7075 has an ultimate tensile strength of 74,000–78,000 psi (510–538 MPa) and yield strength of at least 63,000–69,000 psi (434–476 MPa). It has a failure elongation of 5–8%.