Tobin Bronze 4641 is a copper-base alloy highly resistant to dezincification by sea water. It is recommended for marine propeller shafts, hardware and fittings. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, machining, and joining. Filing Code: Cu-214. Producer or source: Anaconda American Brass Company.