FIELD: alloys as structural materials. SUBSTANCE: alloy based on aluminum/copper/lithium system and useful as structural material in aerospace engineering contains, wt. %: copper, 3.0-3.8; lithium, 1.4-1.7; zirconium, 0.0001-0.04; scandium, 0.16-0.35; iron, 0.01-0.5; magnesium, 0.01-0.7; manganese, 0.05-0.5; hydrogen, 1,0×10-5-5,0×10-5; barium, 0.001-0.2; gallium, 0.001-0.08; antimony, 0.00001-0.001; and aluminum, the balance. EFFECT: increased structural strength, impact resistance, reduced fatigue crack growth rate at the same level of strength properties (ultimate strength, yield point) and weldability. 2 cl, 2 tbl
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