FIELD: metallurgy.
SUBSTANCE: proposed composition contains the following substances, in wt %: copper 3.5-4.5, lithium 0.9-1.5, magnesium 0.01-0.6, silver 0.05-0.7, zinc 0.05-0.8, zirconium 0.01-0.2, iron 0.01-0.1, silicon 0.01-0.1, manganese 0.01-0.5, calcium 0.001-0.25, at least one element selected from the group including scandium 0.01-0.2, titanium 0.01-0.2, cerium 0.05-0.2, aluminium making the rest. Preferable copper-to-lithium ratio makes 2.5-4.0.
EFFECT: lower density alloy of high strength and tenacity.
3 cl, 1 ex, 2 tbl
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