Hastelloy

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

Examples of Hastelloy alloys are:

Hastelloy A
Hastelloy B
Hastelloy B2
Hastelloy B3
Hastelloy C
Hastelloy C4
Hastelloy C22
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 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.