Al-Zn-Mg-Cu-Sc high strength alloy for aerospace and automotive castings

US8157932B2 · kind B2 · utility

Assignee

• ALCOA INC. · US

Inventors

• Xinyan Yan · Murrysville, US
• Jen C. Lin · Export, US
• Cagatay Yanar · Bethel Park, US
• Larry Zellman · Yorktown, US
• Xavier Dumant · Laval, FR
• Robert Tombari · Dollard-Des-Ormeaux, CA
• Eric Milton Lafontaine · Atlanta, US

Key dates

• Filing date: May 23, 2006
• Grant date: Apr 17, 2012
• Expiry date: May 22, 2027

Classification

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

Abstract

An aluminum casting alloy, comprises, in weight percent, about 4-9% Zn; about 1-4% Mg; about 1-2.5% Cu; less than about 0.1% Si; less than about 0.12% Fe; less than about 0.5% Mn; about 0.01-0.05% B; less than about 0.15% Ti; about 0.05-0.2% Zr; about 0.1-0.5% Sc; no more than about 0.05% each miscellaneous element or impurity; no more than about 0.15% total miscellaneous elements or impurities.