Aluminum 61S is a wrought, heat-treatable alloy that combines the qualities of excellent resistance to corrosion, ease of fabrication and good mechanical properties. (See update, Aluminum 6061, Alloy Digest Al-205, January 1973.) This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Al-3. Producer or source: Aluminum Company of America.