FIELD: metallurgy.
SUBSTANCE: proposed composition contains the following substances, in wt %: copper 2.5-3.3; lithium 0.6-1.6; magnesium 0.25-1.2; silver 0.2-0.6; zirconium 0.05-0.13; zinc 0.01-0.8; cerium 0.005-0.1; beryllium 0.00001-0.001; at least one element of the group including: calcium 0.001-0.05; titanium 0.005-0.15; manganese 0.005-0.5; chromium 0.01-0.2; vanadium 0.01-0.2; iron 0.01-0.05; silicon 0.01-0.12 and at least one element of the group including: scandium 0.01-0.11; nickel 0.005-0.1; tin 0.0001-0.05; aluminium making the rest.
EFFECT: higher fracture toughness, ultimate stress, σ"в", ductility σ0,2, better plasticity at cold rolling for production of 0,5 mm deep sheets and weldability.
2 cl, 1 ex, 2 tbl
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