MONEL alloy 450 is a 70-30 cupro-nickel with certain minor elements controlled to improve weldability. The alloy resists attachment of bio-fouling organisms. It resists stress-corrosion cracking in seawater environments. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-534. Producer or source: Inco Alloys International Inc..