ALUMINUM-BASED HIGH-STRENGTH ALLOY AND PRODUCT MANUFACTURED THEREFROM Russian patent published in 2002 - IPC

FIELD: alloys as structural materials. SUBSTANCE: invention relates to alloys based on Al/Zn/Mg/Cu system designed for use as structural material in aircraft and rocket engineering as well as in transport and instrumental mechanical engineering pieces. Alloy contains, wt.%: zinc, 7.6-8.6; magnesium, 1.6-2.3; copper, 1.4-1.95; zirconium, 0.08-0.20; manganese, 0.01-0.1; iron, 0.02-0.15; silicon, 0.01-0.1; chromium, 0.01-0.05; nickel, 0.0001-0.03; beryllium, 0.0001- 0.005; bismuth, 0.00005-0.0005; hydrogen 0,8•10^-5-2,7•10^-5, and at least one mineral from the group containing titanium, 0.005-0.06; and boron, 0.00-0.01; and aluminum, the balance, on condition that zinc+magnesium+copper sum does not exceed 12.5% and iron-to-silicon ratio should be at least 1.2. EFFECT: improved strength and other characteristics needed for principal power units of flying apparatuses in combination with sufficient workability. 5 cl, 3 tbl