Hastelloy is a term used to describe nickel metal alloyed for increased corrosion resistance. This is mainly done by adding molybdenum and chromium. There are many grades of Hastelloy, each with a different chemical composition that needs to be optimized for a specific set of properties. Since Hastelloy typically contains high amounts of molybdenum and chromium, it performs better than other specialty metal products such as Incoloy in severely corrosive environments. The addition of molybdenum also increases general machinability. Hastelloy is also ductile and easy to fabricate and form.

Hastelloy grades typically have the following characteristics:

1. Excellent corrosion resistance

2. Good solderability

3. Resistant to oxidants and acids

How is Hastelloy Made?

    Since Hastelloy is a metal alloy, it is made by combining the original elements in a hot liquid state. There are different grades, each containing a specific chemical composition. Mixtures may contain 1% to 25% chromium, 5% to 30% molybdenum and 0% to 30% iron, with the remainder consisting of nickel. Additional additives can include carbon, tungsten, vanadium and titanium, depending on the grade. Once metals are combined, smelted and mixed together, they can be cast accordingly for further fabrication.