Al-Cu alloy with high toughness

US7494552B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Rinze Benedictus · Delft, NL
• Christian Joachim Keidel · Montabaur, DE
• Alfred Ludwig Heinz · Niederahr, DE
• Alfred Johann Peter Haszler · Vallendar, DE
• Hinrich Hargarter · IJmuiden, NL

Key dates

• Filing date: Aug 13, 2003
• Grant date: Feb 24, 2009
• Expiry date: Aug 13, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C21/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is an Al—Cu alloy of the AA2000-series alloys with high toughness and an improved strength, including the following composition (in weight percent) Cu 4.5-5.5, Mg 0.5-1.6, Mn≦0.80, Zr≦0.18, Cr≦0.18, Si≦0.15, Fe≦0.15, the balance essentially aluminum and incidental elements and impurities, and wherein the amount (in weight %) of magnesium is either: (a) in a range of 1.0 to 1.6%, or alternatively (b) in a range of 0.50 to 1.2% when the amount of dispersoid forming elements such as Cr, Zr or Mn is controlled and (in weight %) in a range of 0.10 to 0.70%.