7XXX-series aluminium alloy product

US11879166B2 · kind B2 · utility

Assignee

• NOVELIS KOBLENZ GMBH · DE

Inventors

• Achim Bürger · Grevesmühlen, DE
• Philippe Meyer · Koblenz, DE
• Sunil Khosla · Beverwijk, NL
• Sabine Maria Spangel · Koblenz, DE
• Christian Gerhard Krechel · Koblenz, DE

Key dates

• Filing date: Nov 5, 2019
• Grant date: Jan 23, 2024
• Expiry date: Nov 5, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/053
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a wrought 7xxx-series aluminium alloy product having a composition comprising, in wt. %., Zn 6.20 to 7.50, Mg 2.15 to 2.75, Cu 1.20 to 2.00, and wherein Cu+Mg<4.50, and wherein Mg<2.5+5/3(Cu-1.2), Fe up to 0.25, Si up to 0.25, and optionally one or more elements selected from the group consisting of: (Zrup to 0.3,Crup to 0.3,Mnup to 0.45,Tiup to 0.25, Scup to 0.5, Agup to 0.5), the balance being aluminium and impurities.