Hastelloy is the registered trademark name of Haynes International, Inc. The trademark is applied as the prefix name of a range of twenty two different highly corrosion-resistant metal alloys loosely grouped by the metallurgical industry under the material term “superalloys” or “high-performance alloys”.

The predominant alloying ingredient is typically the transition metal nickel. Other alloying ingredients are added to nickel in each of the subcategories of this trademark designation and include varying percentages of the elements molybdenum, chromium, cobalt, iron, copper, manganese, titanium, zirconium, aluminum, carbon, and tungsten.

The primary function of the Hastelloy super alloys is that of effective survival under high-temperature, high-stress service in a moderately to severely corrosive, and/or erosion prone environment where more common and less expensive iron-based alloys would fail, including the pressure vessels of some nuclear reactors, chemical reactors, and pipes and valves in chemical industry.

Types

The following Hastelloy alloys have been produced, however production of some may have been discontinued:

• Hastelloy A
• Hastelloy B
• Hastelloy B2
• Hastelloy B3
• Hastelloy B142T
• Hastelloy Hybrid-BC1
• Hastelloy C
• Hastelloy C4
• Hastelloy C22
• Hastelloy C22HS
• Hastelloy C2000
• Hastelloy C263
• Hastelloy C276
• Hastelloy D
• Hastelloy G
• Hastelloy G2
• Hastelloy G3
• Hastelloy G30
• Hastelloy G50
• Hastelloy H9M
• Hastelloy N
• Hastelloy R235
• Hastelloy S
• Hastelloy W
• Hastelloy X

The Corrosion-Resistant HASTELLOY^® alloys are widely used by the chemical processing industries. The need for reliable performance leads to their acceptance and growth in the areas of energy, health and environmental, oil and gas, pharmaceutical and flue gas desulfurization industries. The attributes of HASTELLOY^® alloys include high resistance to uniform attack, outstanding localized corrosion resistance, excellent stress corrosion cracking resistance, and ease of welding and fabrication.