Collectively, the invention of nickel based corrosion resistant alloy Hastelloy is America Haynes international commercial brands and trademark, including Hastelloy B-2, C-4, C-276, C-22, C-2000, G30, G35, B-3 etc..
Grades of Hastelloy include the following grades:
HASTELLOY B-2: Ni-Mo alloy has excellent corrosion resistance in a reductive environment;
HASTELLOY B-3:B-3 has excellent corrosion resistance for any temperature and concentration of hydrochloric acid.
HASTELLOY C-4: better thermal stability, 650-1040 degrees Celsius, good toughness and corrosion resistance.
HASTELLOY C-22: uniform corrosion resistance in oxidation medium, better than C-4 and C-276, excellent resistance to local corrosion.
HASTELLOY C-276: good resistance to oxidation and medium reduction corrosion resistance, excellent resistance to stress corrosion.
HASTELLOY C-2000: the most comprehensive corrosion resistant alloy, with excellent corrosion resistance in both oxidizing and reducing environments.
HASTELLOY G-30: high chromium content nickel based alloy, excellent in phosphoric acid and other strong oxidizing mixed acid medium.
HASTELLOY G-35:G-30 upgrade products, corrosion resistance and thermal stability is better
HASTELLOY X: a combination of high strength, oxidation resistance, and easy to process characteristics.
Each of these brands are chemical composition, specific mechanical properties, each one has his good points can not be generalized, say what are the characteristics of Hastelloy alloy.
Usage:
Hastelloy alloy plate is suitable for various chemical industries containing oxidizing and reducing medium. The higher content of Mo and Cr can make the alloy resistant to chloride ion corrosion, and the tungsten element further improves the corrosion resistance. At the same time C-276 Hastelloy tube is only several resistance to wet chlorine, hypochlorite and chlorine dioxide solution corrosion materials of chloride in high salt concentration solution such as ferric chloride and copper chloride have significant corrosion resistance.
Application area:
Heat exchanger, bellows compensator, chemical equipment, flue gas desulfurization and denitrification, paper industry, aerospace applications, acid environment.
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