ALCOLOY ALLOY 688 is a high-strength cobalt-aluminum modified brass alloy with good drawability and formability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-219. Producer or source: Olin Brass.