| 摘要 |
The invention consists in a substantially manganese-free aluminum alloy rolled product consisting essentially of (in percent by weight): Cu 3.6 - 4.5%, Mg 1.0 - 1.6%, Zr 0.08 - 0.20%, Sc up to 0.06%, Fe up to 0.08%, Si up to 0.09% Mn less than 0.05%, the remainder aluminum and incident impurities, with high mechanical resistance, high fracture toughness and good corrosion resistance, suitable for use as lower wing skin and fuselage skin in commercial civil aircrafts. |
