HASTELLOY Meaning and
Definition
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Hastelloy is a registered trademark name for a group of high-performance alloys that are primarily composed of nickel and chromium, with additional elements such as molybdenum, tungsten, and iron. These alloys are specifically designed to offer excellent resistance to corrosion, high temperature, and stress corrosion cracking, making them ideal for applications in aggressive environments, such as chemical processing plants, oil and gas industries, and nuclear power plants.
Hastelloy alloys have superior properties compared to standard stainless steels and other nickel-based alloys due to their unique composition. The addition of molybdenum and tungsten enhances the alloys' resistance to localized corrosion, while the presence of chromium provides excellent resistance to oxidizing media. This combination of elements allows Hastelloy to withstand highly corrosive conditions including those influenced by acids, chlorides, seawater, and many other chemicals.
Aside from corrosion resistance, Hastelloy alloys also possess exceptional mechanical properties including high tensile strength, toughness, and good fabricability. They can be readily formed, welded, and machined, allowing for easy fabrication of complex components.
Another noteworthy characteristic of Hastelloy alloys is their ability to retain their exceptional properties even at elevated temperatures. They maintain remarkable strength and creep resistance, making them suitable for use in high-temperature applications.
Overall, Hastelloy is a family of alloys renowned for their outstanding resistance to corrosion, excellent mechanical properties, and high-temperature capabilities, making them a preferred choice for critical applications in corrosive environments.
Etymology of HASTELLOY
The word "Hastelloy" is derived from the combination of two elements: "Haste" and "Alloy". "Haste" is believed to reference Haynes Stellite, which is an alloy company founded by Elwood Haynes in the early 20th century. Elwood Haynes was known for his work on producing high-performance alloys.
The second part of the word, "Alloy", refers to the fact that Hastelloy is a group of alloys composed primarily of nickel, with the addition of other elements such as chromium, molybdenum, and tungsten. The term "Hastelloy" has become a trademarked name for these corrosion-resistant alloys.
