Alcoa has developed this Al-Li alloy with the benefits of excellent corrosion resistance, a good spectrum of fatigue crack growth performance, a good strength and toughness combination, and compatibility with standard manufacturing techniques for aircraft internal structures. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming. Filing Code: Al-439. Producer or source: Alcoa Engineered Aerospace Products.