The invention relates to a work-hardened product, particularly a rolled,
extruded or forged product, made of an alloy with the following
composition (% by weight): Cu 3.8-4.3; Mg 1.25-1.45; Mn 0.2-0.5; Zn
0.4-1.3; Fe<0.15; Si<0.15; Zr.ltoreq.0.05; Ag<0.01, other
elements <0.05 each and <0.15 total, remainder Al treated by
dissolution, quenching and cold strain-hardening, with a permanent
deformation of between 0.5% and 15%, and preferably between 1.5% and
3.5%. Cold strain-hardening can be achieved by controlled tension and/or
cold transformation, for example rolling, die forging or drawing. This
cladded metal plate type product is a suitable element to be used as
aircraft fuselage skin.