Patent ID: 9206496
Filing Date: 2015-12-08
Classification: C22C,C22F,Y10T

Abstract:
1. An aluminum alloy hollow extruded material, comprising: Zn: 3.0 to 8.0 mass %; Mg: 0.4 to 2.0 mass %; Cu: 0.05 to 2.0 mass %; Ti: 0.005 to 0.2 mass %; Si: 0.3 mass % or less; Fe: 0.35 mass % or less; one or more of Mn, Cr, and Zr: 0.10 mass % or less in total; and Al, wherein the aluminum alloy hollow extruded material is formed by porthole extrusion, and wherein the aluminum alloy hollow extruded material has a recrystallized structure throughout a cross-section thereof.