FIELD: aluminium-base alloys applicable in the capacity as structural materials. SUBSTANCE: aluminium-base alloy has the following qualitative and quantitative composition, mas. magnesium 3.5-4.5; manganese 0.2-0.7; chromium 0.05-0.25; zirconium 0.05-0.12; beryllium 0.0001-0.005; yttrium 0.1-0.3; yttrium oxide 0.1-0.5; aluminium oxide 0.1- 0.5; the balance, aluminium. Alloy properties: ultimate strength 34.4-36.7 kgf/sq.mm; yield point 18.6-20.3 kgf/sq. mm; elongation 17.6-19.3% number of cycles up to crank appearance 314-338. EFFECT: higher service properties. 2 tbl
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