Material Name: Wrought aluminum and aluminum alloy grades: 7020 Properties and Applications: 7020 aluminum alloy, aluminum and aluminum alloy deformed the United States. 7020 belongs to the high-strength aluminum alloy Al-Zn-Mg alloy, high strength, good welding performance and process performance, aircraft and spacecraft as well as the main structural material welding ground vehicles and equipment, and is widely used in the manufacture of high-speed trains body. 7020 aluminum alloy after heat treatment has a good overall performance. Strength 7020 aluminum alloy is greater than 6082, but its molding capabilities accordingly deteriorated. Standard control: American Aluminum Association (AA) 7020, ISO R209 AlZn4.5Mg1 chemical composition: aluminum Al (minimum): margin silicon Si: ≤0.35 iron Fe: ≤0.40 copper Cu: ≤0.20 Manganese Mn: 0.05 ~ 0.50 Mg Mg: 1.0 ~ 1.4 chromium Cr: 0.10 ~ 0.35 Zinc Zn: 4.0 ~ 5.0 zirconium Zr: 0.08 ~ 0.20 Zr + Ti Zr + Ti: 0.08 ~ 0.25 Ti Ti: - other unspecified elements: each: ≤0.05; Total: ≤0.15