| 摘要 |
An aluminum alloy suitable for anodizing contains, in mass percent, Zn: 5.0% or more and 7.0% or less, Mg: more than 2.2% and 3.0% or less, Cu: 0.01% or more and 0.10% or less, Zr: 0.10% or less, Cr: 0.02% or less, Fe: 0.30% or less, Si: 0.30% or less, Mn: 0.02% or less, and Ti: 0.001% or more and 0.05% or less, the remainder being composed of Al and unavoidable impurities. The aluminum alloy has a Zn/Mg ratio of 1.7 or more and 3.1 or less, a proof stress of 350 MPa or more and a metallographic structure composed of a recrystallized structure. |
