US Patent Issued to AISIN KEIKINZOKU on Aug. 25 for "Method for manufacturing aluminum alloy extruded material with high strength and excellent in SCC resistance and hardenability" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,716,118, issued on Aug. 25, was assigned to AISIN KEIKINZOKU Co. LTD. (Japan).

"Method for manufacturing aluminum alloy extruded material with high strength and excellent in SCC resistance and hardenability" was invented by Karin Shibata (Imizu, Japan) and Hiroaki Matsui (Imizu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The method includes casting a billet of an aluminum alloy composition including, by mass: 6.0 to 8.0% of Zn, 1.5 to 3.0% of Mg, 0.20 to 1.50% of Cu, 0.10 to 0.25% of Zr, 0.005 to 0.05% of Ti, 0.15 to 0.35% of Mn, 0.25% or less of Sr, and 0.25 to 0.50% of a total of [Mn+Zr+Sr], and a balance including Al and unavoidable impurit...