Alloy 7075 is Introduced by Alcoa in 1943,
alloy 7075 has been the standard workhorse 7XXX series alloy within the
aerospace industry ever since. It was the first successful Al-Zn-Mg-Cu high
strength alloy using the beneficial effects of the alloying addition of chromium
to develop good stress-corrosion cracking resistance in sheet products. Although
other 7XXX alloys have since been developed with improved specific properties,
alloy 7075 remains the baseline with a good balance of properties required for
aerospace applications.
Alloy 7075 sheet and plate
products have application throughout aircraft and aerospace structures where a
combination of high strength with moderate toughness and corrosion resistance
are required.