Patent ID: 8016958
Filing Date: 2011-09-13
Classification: B21B,B22D,C22C,C22F,Y10T

Abstract:
1. A high strength aluminum alloy sheet having superior surface roughening and formability, said sheet having a chemical composition comprising: Mg: 2.0 to 3.3 mass %, Mn: 0.1 to 0.5 mass %, and Fe: 0.79 to 1.0 mass %, having a balance of unavoidable impurities and Al, and having a Si among the unavoidable impurities of less than 0.20 mass %, and said sheet having an average circle equivalent diameter of intermetallic compounds of 1 μm or less, having an area ratio of intermetallic compounds of 3.80% or more, having an average diameter of recrystallized grains of 10 μm or less, and having a tensile strength of 220 MPa or more at room temperature.