Hastelloy Alloy and Hastelloy Valves Introduction

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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*.

Acetic Acid Acetic Anhydride Acetic Vapors Aluminum Acetate Aluminum Chloride Aluminum Fluoride Aluminum Oxalate Aluminum Potassium Sulfate Aluminum Sulfate Ammonia (Anhydrous Dry) Ammonium Alum Ammonium Bromide Ammonium Carbonate Ammonium Chloride Ammonium Hydroxide Ammonium Monosulfate Ammonium Nitrate Ammonium Oxalate Ammonium Persulfate Ammonium Phosphate Ammonium Sulfate Amyl Chloride Aniline Hydrochloride Barium Carbonate Barium Chloride Benzoic Acid Boric Acid Butyl Acetate Butyric Acid Calcium Carbonate Calcium Chlorate Calcium Chloride Calcium Hydroxide Calcium Hypochlorite Carbolic Acid Carbolic Acid C.P. Carbon Tetrachloride Carbonic Acid Chloroacetic Acid Chlorosulfonic Acid Chromic Acid Chromic Acid C. P. Citric Acid Copper Acetate Copper Carbonate Copper Chloride Copper Cyanide Copper Nitrate Copper Sulfate Cupric Chloride Cupric Nitrate Ethyl Acetate Ethyl Chloride

Fatty Acids Ferric Chloride Ferric Hydroxide Ferric Nitrate Ferric Sulfate Ferrous Ammonium Citrate Ferrous Chloride Ferrous Sulfate Formic Acid Gallic Acid Hydrochloric Acid Hydrocyanic Acid Hydrofluoric Acid Hydrofluoric Acid Vapor Hydrofluosilicic Acid Hydrogen Peroxide Hydrogen Sulfide Lactic Acid Lactic Acid Salts Lead Acetate Magnesium Carbonate Magnesium Chloride Magnesium Hydroxide Magnesium Nitrate Magnesium Sulfate Malic Acid Mercuric Chloride Mercuric Cyanide Mercurous Nitrate Methylene Chloride Molybdic Acid Muriatic Acid Nickel Chloride Nickel Nitrate Nickel Sulfate Nitric Acid Nitrous Oxide Oleic Acid Phosphoric Acid Phosphorous Trichloride Picric Acid Potassium Bichromate Potassium Bromide Potassium Carbonate Potassium Chlorate Potassium Chloride Potassium Cyanide Potassium Dichromate Potassium Ferricyanide Potassium Ferrocyanide Potassium Hydrate Potassium Hydroxide Potassium Hypochlorite

Potassium Iodide Potassium Nitrate Potassium Oxalate Potassium Permanganate Potassium Sulfate Pyrogallic Acid Quinine Bisulfate (Dry) Quinine Sulfate (Dry) Salicyllic Acid Silver Bromide Silver Chloride Silver Cyanide Sodium Acetate (moist) Sodium Benzoate Sodium Bicarbonate Sodium Bichromate Sodium Bisulfate Sodium Borate Sodium Bromide Sodium Carbonate Sodium Chlorate Sodium Chloride Sodium Citrate Sodium Ferricyanide Sodium Fluoride Sodium Hydrosulfite Sodium Hydroxide Sodium Hypochlorite Sodium Hyposulfite Sodium Lactate Sodium Nitrate Sodium Peroxide Sodium Phosphate Sodium Silicate Sodium Sulfate Sodium Sulfide Sodium Sulfite Stannic Chloride Stearic Acid Sulfur Dioxide Sulfuric Acid Sulfuric Anhydride Sulfurous Acid Sulfurous Spray Tannic Acid Tartaric Acid Titanium Tetrachloride Trichloroacetic Acid Uric Acid Zinc Chloride Zinc Sulfate

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.