Stress corrosion resistant aluminium-magnesium-lithium-copper alloy

摘要

An aluminium base alloy having a composition within the following ranges in weight percent: -Lithium 2.1-2.9 -Magnesium 3.0-5.5 -Copper 0.2-0.7 and - one or more constituents selected from the group consisting of Zirconium, Hafnium and Niobium as follows: -Zirconium 0.05-0.25 -Hafnium 0.10-0.50 -Niobium 0.05-0.30 and -Zinc 0-2.0 -Titanium 0-0.5 -Manganese 0-0.5 -Nickel 0-0.5 -Chromium 0-0.5 -Germanium 0-0.2 -Aluminium Remainder (apart from - incidental impurities). -