Nickel Alloy Hastelloy X

General Characteristics

Hastelloy X is a nickel-chromium-iron-molybdenum super-alloy with outstanding high temperature strength, oxidation resistance, and fabricability. Alloy X’s oxidation resistance is excellent up to 2200° F. This nickel steel alloy has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. Matrix stiffening provided by the molybdenum content, results in high strength in a solid-solution alloy having good fabrication characteristics. Although this nickel alloy is primarily noted for heat and oxidation resistance, it also has good resistance to chloride stress-corrosion cracking, carburization and excellent resistance to reducing or carburizing atmospheres. Hastelloy X resists carburization and nitriding, two common conditions that often lead to early failure in high temperature alloys.

Alloy X is one of the most widely used nickel base superalloys for gas turbine engine combustion zone components such as transition ducts, combustor cans, spray bars and flame holders as well as in afterburners, tailpipes and cabin heaters. It is recommended for use in industrial furnace applications because it has unusual resistance to oxidizing, reducing and neutral atmospheres. Hastelloy X is also used in the chemical process industry for retorts, muffles, catalysts support grids, furnace baffles, tubing for pyrolysis operations and flash drier components.

Typical Chemical Composition

Physical Properties

Mechanical Properties