ALUMINIUM ALLOY RESISTANT TO INTERCRYSTALLINE CORROSION Russian patent published in 2017 - IPC C22C21/06 

FIELD: metallurgy.

SUBSTANCE: aluminium alloy contains components in the following ratio, wt %: 2.91≤Mg≤4.5, 0.5≤Mn≤0.8, 0.05≤Cu≤0.30, 0.05≤Cr≤0.30, 0.05≤Zn≤0.9, Fe≤0.40, Si≤0.25, Ti≤0.20, the rest is aluminium and impurities. The content of each impurity is less than 0.05 and thereof total amount is less than 0.15. The content of Zn, Cr, Cu and Mn in the alloy must satisfy the following relationship (2.3*%Zn+1.25*%Cr+0.65*%Cu+0.05*%Mn)+2.4≥%Mg.

EFFECT: production of aluminium alloy having a slight tendency to intergranular corrosion, high strength and good deformability, containing standard components, which simplify secondary processing of aluminium alloy.

14 cl, 3 tbl