公开(公告)号：US11976347B2

公开(公告)日：2024-05-07

申请号：US16627970

申请日：2018-06-28

Applicant: CONSTELLIUM ISSOIRE

Inventor： Ricky Whelchel ,  Erembert Nizery ,  Diana Koschel ,  Jean-Christophe Ehrstrom ,  Alireza Arbab

IPC: C22F1/053 ,  C22C21/10

CPC classification number: C22F1/053 ,  C22C21/10

Abstract: The invention concerns an extruded, rolled and/or forged aluminum-based alloy product having a thickness of at least 25 mm comprising (in weight %): Zn 6.70-7.40; Mg 1.50-1.80; Cu 2.20-2.60, with a Cu to Mg ratio of at least 1.30; Zr 0.04-0.14; Mn 0-0.5; Ti 0-0.15; V 0-0.15; Cr 0-0.25; Fe 0-0.15; Si 0-0.15; impurities ≤0.05 each and ≤0.15 total. The invention also concerns a method of making such a product. Products according to the invention are particularly advantageous because they exhibit simultaneously a low sensitivity to environmentally assisted cracking under conditions of high stress and humid environment, high strength and high toughness properties.