Hastelloy® X Alloy Pipe (UNS N06002): Comprehensive Overview Hastelloy® X is a nickel-chromium-iron-molybdenum superalloy developed by Haynes International, Inc. for exceptional high-temperature strength, oxidation resistance, and corrosion resistance in extreme environments. Designated as UNS N06002, Hastelloy® X is widely used in seamless and welded pipes and tubes for applications in aerospace, chemical processing, petrochemical industries,