Patent ID: 9353431
Filing Date: 2016-05-31
CPC Classification: B21C,C22C,C22F

Claim Text:
1. An aluminum alloy material, comprising in mass percent: Zn: more than 7.2% and 8.7% or less, Mg: 1.3% or more and 2.1% or less, Cu: less than 0.50%, Fe: 0.30% or less, Si: 0.30% or less, Mn: less than 0.05%, Cr: 0.20% or less, Zr: less than 0.05%, Ti: 0.001% or more and 0.05% or less, the balance being Al and unavoidable impurities; wherein the aluminum alloy material has a proof stress of 350 MPa or more, and a metallographic structure consisting essentially of a recrystallized structure.