Al—Zn—Mg alloy product with reduced quench sensitivity

US9890448B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Shangping Chen · Beverwijk, NL
• Linzhong Zhuang · Beverwijk, NL
• Sunil Khosla · Beverwijk, NL
• Hugo Van Schoonevelt · Noordbeemster, NL
• Andrew Norman · Beverwijk, NL
• Achim Bürger · Grevesmühlen, DE

Key dates

• Filing date: Nov 19, 2014
• Grant date: Feb 13, 2018
• Expiry date: Mar 16, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/002
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This relates to an aluminum alloy product, in particular an age-hardenable Al—Zn—Mg type alloy product for structural members, the alloy product combining a high strength with high toughness and reduced quench sensitivity, and having a chemical composition including, in wt. %: Zn about 3 to 11%, Mg about 1 to 3%, Cu about 0.9 to 3%, Ge about 0.03 to 0.4%, Si max. 0.5%, Fe max. 0.5%, balance aluminum and normal and/or inevitable elements and impurities. Furthermore, this relates to a method of producing such aluminum alloy products.