Aluminum alloy and method for producing aluminum alloy

Provided is an aluminum alloy comprising: 5.0 to 6.5 mass% of Zn, 2.0 to 3.0 mass% of Mg, 1.2 to 2.0 mass% of Cu; the present invention relates to a high-strength aluminum alloy which is characterized by containing at least one element from among 2.0-5.0 mass% of Ni, 0.5-3.5 mass% of Ag, and 0.1-0.4 mass% of Li, containing 0.25 mass% or less of Si, containing 0.25 mass% or less of Mn, and having a remainder made up by Al and unavoidable impurities, and which has a tensile strength of 650 MPa or more. With this aluminum alloy, it is possible to provide a high-strength aluminum alloy having excellent surface treatability. The high strength of the Al alloy is improved, so that the product is light. In addition, the improvement of the surface treatability enables the stable imparting of corrosion resistance and the shortening of the pre-time of the product. 提供铝合金，其包含Zn：5.0-6.5质量%、Mg：2.0-3.0质量%、Cu：1.2-2.0质量%；包含Ni：2.0-5.0质量%、Ag：0.5-3.5质量%、Li：0.1-0.4质量%这三种元素中的至少一种元素，含有的Si为0.25质量%以下，含有的Mn为0.25质量%以下，余量由Al及不可避免的杂质构成，拉伸