Well, theres different varieties in the 7000 series, i found this
7068 aluminium alloy is the strongest commercially available
aluminium alloy, and comparable to that of some
steels.
Primarily developed for
ordnance applications, alloy 7068 is now being used or considered for markets like the aerospace and automotive industries (valve body and connecting rod applications), medical devices, such as prosthetic limbs, as well as recreational products like
bicycles and mountain climbing equipment.
[3] Most recently, it was discovered that 7068 is used to make the outer encasing of the iPhone 6s and iPhone 6s Plus.
Manufactured by Kaiser USA. Supplied throughout Europe by Smiths Advanced Metals.
but also 6061 aluminum is also used in aviation and its more popular and used in
6061 is commonly used for the following:
- construction of aircraft structures, such as wings and fuselages, more commonly in homebuilt aircraft than commercial or military aircraft.[7] 2024 alloy is somewhat stronger, but 6061 is more easily worked and remains resistant to corrosion even when the surface is abraded, which is not the case for 2024, which is usually used with a thin Alclad coating for corrosion resistance.[8]
- yacht construction, including small utility boats.[9]
- automotive parts, such as wheel spacers.
- some tactical flashlights
- aluminium cans for the packaging of food and beverages.
- SCUBA tanks (post 1995)
6061-T6 is used for:
I also looked a little more and found that the aluminum used on the iPhones now is not what they used for high end aerospace/space missions. they use a special version of the 7000 series.