a high - strength aluminum alloy exhibiting excellent stress corrosion cracking resistance and excellent extrudability , and a method for producing an extruded shape using the same are disclosed . the aluminum alloy includes 1 . 6 to 2 . 6 mass % of mg , 6 . 0 to 7 . 0 mass % of zn , 0 . 5 mass % or less of cu , and 0 . 01 to 0 . 05 mass % of ti , with the balance being al and unavoidable impurities .