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Abstract

The invention relates to a wrought product made of an aluminum alloy having the composition in % by weight, Mg: 4.0-5.0; Li: 1.0-1.8; Mn: 0.3-0.5; Zr: 0.05-0.15; Ag: ≦0.5; Fe: ≦0.1; Ti: <0.15; Si: ≦0.05; other elements ≦0.05 each and ≦0.15 in association; the remainder is aluminum. The invention further relates to a method for manufacturing a wrought product wherein an unprocessed form of aluminum alloy is cast, which has the composition, in % by weight: Mg: 4.0-5.0; Li: 1.0-1.8; Mn: 0.3-0.5; Zr: 0.05-0.15; Ag: ≦0.5; Fe: ≦0.1; Ti: <0.15; Si: ≦0.05; other elements ≦0.05 each and ≦0.15 in combination; the remainder is aluminum; optionally, said unprocessed form is homogenized; said unprocessed form is hot worked to obtain a hot-worked product; optionally, said hot-worked product is solution heat treated at a temperature from 360° C. to 460° C., preferably from 380° C. to 420° C., for 15 minutes to 8 hours; said hot-worked product is quenched; optionally, said worked and quenched product is straightened; optionally, the worked product is cold worked under controlled conditions to obtain permanent cold working set from 1 to 10%, preferably from 2 to 6%, most preferably from 3 to 5%; said worked and quenched product is aged. The invention further relates to the use of said wrought product to produce aircraft structural elements.

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First Claim