Al—Mg—Zn wrought alloy product and method of its manufacture

US9039848B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Andrew Norman · Beverwijk, NL
• Alastair Wise · Santpoort-Noord, NL
• Achim Bürger · Grevesmühlen, DE
• Sabine Maria Spangel · Koblenz, DE

Key dates

• Filing date: Nov 5, 2008
• Grant date: May 26, 2015
• Expiry date: Feb 13, 2031

Classification

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

Abstract

An aluminum alloy wrought product including, in wt. %, Mg 3.0 to 7.0, Zn 0.6 to 2.8, Mn 0 to 1.0, Cu 0 to 2.0, Sc 0 to 0.6, at least one element selected from the group of Zr 0.04 to 0.4, Cr 0.04 to 0.4, Hf 0.04 to 0.4 and Ti 0.01 to 0.3; Fe maximum 0.3, Si maximum 0.3, inevitable impurities, and balance aluminum. The range for the Zn-content in wt. % is a function of the Mg-content according to: lower-limit of the Zn-range: [Zn]=0.34[Mg]−0.4, and upper-limit of the Zn-range: [Zn]=0.34[Mg]+0.4.