What is hastelloy material?
Hastelloy refers to nickel metal that has been alloyed to improve corrosion resistance. This is primarily achieved through the addition of molybdenum and chromium. There are many grades of Hastelloy, each with a different chemical composition to optimize its specific properties.
Hastelloy typically contains high amounts of molybdenum and chromium, so it outperforms other specialty metal products, such as Incoloy, in severely corrosive environments. The addition of molybdenum also improves overall machinability. Hastelloy also has good ductility, making it easy to fabricate and form.
Hastelloy grades typically have the following properties:
Excellent corrosion resistance
Good weldability
Resistant to oxidants and acids
How is Hastelloy made?
Since Hastelloy is a metal alloy, it is made by mixing raw elements together in a high-temperature liquid state. There are many grades of Hastelloy, each containing a specific chemical composition. The amount of chromium in the mix may range from 1% to 25%, molybdenum from 5% to 30%, iron from 0% to 30%, and the rest made up of nickel. Depending on the grade, other additives may include carbon, tungsten, vanadium, and titanium.
Once these metals are combined, melted, and mixed together, they can be cast accordingly for further production.
What is Hastelloy used for?
Hastelloy has excellent corrosion resistance, making it an excellent choice for any moderate to severely corrosive environment when product life is critical. It is commonly used for pipes and valves in the chemical and petrochemical industries. It is also used in reactor vessels in the chemical and nuclear industries.
There are many grades of Hastelloy, but C276 is one of the most popular grades. This grade is often used in the harsh environments mentioned above as well as in paper and pulp production and waste treatment.
