Hastelloy Alloy and Hastelloy Valves Introduction

Hastelloy Alloy Summary:

Hastelloy alloy is corrosion resistant metal mixtures that are based on nickel. Hastealloys have a unique combination of properties that provide them with significantly stronger corrosion resistance capabilities compared to traditional alloys.The two main hastealloys are nickel-molybdenum (Ni-Mo) and nickel-chromium (Ni-Cr). The key elements that are often combined with nickel and their corresponding percentage concentrations are as follows:

• Molybdenum (Mo) - 30%
• Chromium (Cr) - 23%
• Iron (Fe) - 29%

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 geothermal, solar energy, oil and gas and pharmaceutical. The benefits of Hastelloy process equipment include high resistance to uniform attack, outstanding localized corrosion resistance, excellent stress corrosion cracking resistance, and ease of welding and fabrication.

Hastelloy Alloy Applications
Hastelloy serves many different applications in these industry categories:

• Chemical Process
• Petrochemical
• Oil & Gas
• Pharmaceutical
• Geothermal
• Sea Water
• Water Desalination
• LNG (Liquefied Natural Gas)
• Biomass
• Mining
• Utilities
• Nuclear Power
• Solar Power

Hastelloy is very well suited to many industrial processes. The following are some of the environments in which Hastelloy is fully resistant*.
Hastelloy Alloy Material Grades:

The most versatile of the Hastelloy alloys are the "C-type". Hastelloy c alloys include:

• C-276 - A Versatile, corrosion resistant alloy. It has very good resistance to reducing, and mildly oxidizing corrosives. Excellent stress corrosion cracking resistance with very good resistance to localized attack.
• C-2000 Like all Hastelloy grades, the C-2000 alloy combines outstanding resistance to oxidizing media with superior resistance to non-oxidizing environments and represents a true performance breakthrough for chemical process equipment applications.  
• C-22 The Hastelloy C-22 properties make it particularly resistant to pitting and crevice corrosion. Moreover, it has been used extensively to protect against the most corrosive FGD systems and the most sophisticated pharmaceutical reaction vessels.