The present invention relates to aluminum-based alloy of Al--Cu--Mg--Li
type and to an article made thereof which are intended to be used in
aircraft and aerospace vehicles.While having high strength properties
(ultimate strength level and yield strength level) the suggested alloy
has a reduced sound conductivity upon acoustic influence.The invented
alloy contains (mass. %):
TABLE-US-00001
Li 1.7-2.0
Cu 1.6-2.0
Mg 0.7-1.1
Zr 0.04-0.2
Be 0.02-0.2
Ti 0.01-0.1
Ni 0.01-0.15
Mn 0.01-0.4
S 0.5 10.sup.-4-1.0 10.sup.-4
N 0.5 10.sup.-4-1.0 10.sup.-4
Co 0.5 10.sup.-6-1.0 10.sup.-6
Na 0.5 10.sup.-3-1.0 10.sup.-3
Al-balance
Sheets of said alloy are particularly suited to be used as structural
material for aircraft and aerospace vehicles in the form of skin and a
primary sheets' set.
