Basic information of alloy

Hastelloy C-22 is a nickel-based alloy with high temperature resistance and corrosion resistance, and is widely used in many industrial fields. Its common grades include C-22, INCONEL Alloy C-22, HC-22, Hastelloy C-22, UNSN06022, W.-Nr.2.4602, ATIC-22, Nicrofer5621hMoW-Alloy C-22, NASNW22, NS338, inconel622, etc. The standards implemented by this alloy include ASTM B575/ASME SB-575, ASTM B574/ASME SB-574, ASTM B622/ASME SB-622, ASTM B619/ASME SB-619, ASTM B366/ASME SB-366, ASTM B564/ASME SB-564

Product Parameters

Chemical Composition

Mechanical Properties

Physical Performance

Key Features and Benefits

1. Corrosion Resistance

Hastelloy C-22 alloy is an all-around nickel-chromium-molybdenum-tungsten alloy with better overall corrosion resistance than existing nickel-chromium-molybdenum alloys such as Hastelloy C-276, C4 alloy and 625 alloy1. It has good resistance to pitting, crevice corrosion and stress corrosion cracking, excellent resistance to oxidizing aqueous media, including wet chlorine, nitric acid or mixed acids of oxidizing acids containing chloride ions, and also has ideal resistance to reducing and oxidizing environments encountered in the process1. The high content of molybdenum and chromium makes the alloy resistant to chloride ion corrosion, and the tungsten element further improves its corrosion resistance. It is one of the only materials that can resist corrosion from moist chlorine, hypochlorite and chlorine dioxide solutions, and has excellent corrosion resistance to high-concentration chloride solutions (such as ferric chloride and cupric chloride).

2. Welding performance

Hastelloy C-22 alloy has the ability to resist the formation of grain boundary precipitation in the heat-affected zone of welding, which makes it suitable for many chemical process applications in the welding state, and has good welding performance.

Metallographic structure

Hastelloy C-22 is a face-centered cubic lattice structure

Delivery and appearance status

Delivery status: forged, cast, annealed, solid solution, aging, etc. 3.

Appearance: black skin, polished, polished, pickled

Dimensions

Dimensions include nominal size, tolerance range, fixed length, unfixed length, and standard size. Product categories include bars, pipes, strips, wires, flanges, plates, rings, rounds, forgings, welding wires, etc., which can be produced according to customer requirements3. Among them, bars include round bars, forged round bars, round steel, etc.

Application fields

Hastelloy C-22 alloy has been widely used in the chemical and petrochemical fields, such as components and catalytic systems that come into contact with chloride-containing organic matter. Specific application areas also include power plant desulfurization and denitrification environmental protection, petrochemical equipment, coal chemical industry, fluorine chemical industry, fine chemical industry, PTA, aviation manufacturing, offshore platform, seawater desalination, papermaking machinery, pharmaceutical equipment, heat exchange equipment, electrochemistry, metallurgy, nuclear energy, chlor-alkali, shipbuilding, cement manufacturing, composite board, acetic acid and acetic anhydride, salt production and plate heat exchanger, bellows expansion joint and other industries and products

Heat treatment process

The heat treatment process of Hastelloy C-22 is to keep it between 1150-1175℃ for 1-2 hours, and then quickly cool it with air or water