MONEL alloy R-405 is a machining grade of nickel-copper alloy that combines toughness, strength and corrosion resistance of MONEL alloy 400 with excellent machinability. The alloy is designed especially for use in automatic screw machines. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-79. Producer or source: Huntington Alloy Products Division.