ALUMINUM-COPPER-LITHIUM ALLOY FOR LOWER SURFACE ELEMENT

摘要

The invention relates to an aluminum-based alloy comprising, in % by weight, 2.1 to 2.4% of Cu, 1.3 to 1.6% of Li, 0.1 to 0.51% of Ag, 0.2 to 0.6% of Mg, 0.05 to 0.15% of Zr, 0.1 to 0.5% of Mn, 0.01 to 0.12% of Ti, optionally at least one element chosen from Cr, Se, and Hf, the amount of the element, if it is chosen, being from 0.05 to 0.3% for Cr and for Se, and 0.05 to 0.5% for Hf, an amount of Fe and of Si less than or equal to 0.1% each, and inevitable impurities in a content less than or equal to 0.05% each and 0.15% in total. The alloy makes it possible to produce extruded, rolled and/or forged products that are in particular suitable for the manufacture of aircraft wing lower surface elements.