Aluminium-magnesium-zinc-silicon alloy, preferably in the form of a plate or a sheet or an extrusion, having the following composition in weight percent: Mg 0.5-1.5; Zn 0.1-3.8; Si 0.05-1.5; Mn 0.2-0.8; Zr 0.05-0.25; Cr 0.3 max.; Cu<0.3; Fe 0.5 max.; Ag 0.4 max.; Ti 0.2 max.; balance Al and inevitable impurities.

lega del Alluminio-magnesio-zinco-silicone, preferibilmente sotto forma d'una lamiera o un lamierino o un'espulsione, avendo la seguente composizione nei percento del peso: Magnesio 0.5-1.5; Zn 0.1-3.8; Silicone 0.05-1.5; Manganese 0.2-0.8; Zr 0.05-0.25; Cr 0.3 massimi; Cu