STRIP OF ALUMINIUM ALLOY, RESISTANT TO INTERCRYSTALLINE CORROSION AND ITS MANUFACTURING METHOD Russian patent published in 2017 - IPC C22C21/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to production of aluminium alloy of AA 5xxx type with Mg content at least 4 wt%, and can be used for car components production. Strip is made from aluminium alloy, having following composition, wt%: Si≤0.2, Fe≤0.35, 0.04≤Cu≤0.08, 0.2≤Mn≤0.5, 4.35≤Mg≤4.8, Cr≤0.1, Zn≤0.25, Ti≤0.l, balance is Al and unavoidable impurities making not more than 0.05 wt% individually and not more than 0.15 wt% in total, wherein strip from aluminium alloy has recrystallized microstructure, in which grain size (GS) of microstructure satisfies following relationship: GS>22+2*c_Mg, where (c_Mg) is Mg content in wt%.

EFFECT: invention is aimed at production of AlMg alloy with Mg content at least 4 wt%, despite high strength having resistance to intercrystalline corrosion.

12 cl, 2 tbl, 3 dwg