Aluminium-based alloy

Abstract

The invention refers to the metallurgy, in particular to non-heat-treatable wrought aluminium alloys based on the aluminium-magnesium-scandium system used as materials for elements of structures including welded structures. The non-heat-treatable wrought aluminium-based alloy contains, % wt: magnesium 3.0-5.2, manganese 0.15-1.0, scandium 0.01-0.045, zirconium 0.03-0.14, silicon 0.025-0.18, titanium 0.01-0.05, optionally yttrium, additionally at least one element of the group including copper and zinc in quantity of 0.01-0.55, at least one element of the group including boron and carbon in quantity of 0.01-0.05, aluminium and inevitable impurities as balance. The alloy is characterised by high values of strength, corrosion resistance, percentage elongation in the annealed state, as well as high workability.