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Hastelloy C-22 UNSN06022 BAR/Bolt/ Sheet/Pipe

Common Trade Names: Hastelloy C22, Alloy 22,UNS N06022,NS3308

Hastelloy alloy C22, also known as alloy C22, is a kind of multifunctional austenitic Ni-Cr-Mo Tungsten alloy, which has stronger resistance to pitting, crevice corrosion and stress corrosion cracking.The high chromium content provides good oxidation resistance to the medium, while the molybdenum and tungsten content has good tolerance to the reducing medium.

Hastelloy C-22 has antioxidant acyl gas, moisture, formic and acetic acid, ferric chloride and copper chloride, sea water, brine and many mixed or contaminated organic and inorganic chemical solutions.
This nickel alloy also provides optimal resistance in environments where reduction and oxidation conditions are encountered during the process.
This nickel alloy is resistant to the formation of grain boundary precipitates in the heat affected zone of welding and is therefore suitable for most chemical process applications under welding conditions.
Hastelloy C-22 should not be used at temperatures higher than 12509F because of the formation of harmful phases higher than this temperature.

Hastelloy C-22 Chemical Composition





















- - - - - 2.5 - -





2.5 0.01 0.5 0.08 0.02 3.5 0.35 0.02



Hastelloy C-22 Physical Properties
Density 8.9 g/cm³
Melting point 1325-1370 ℃
Hastelloy C-22 Mechanical Properties
Status Tensile strength 
Rm N/mm²
Yield strength 
Rp 0. 2N/mm²
As %
Brinell hardness HB
Solution treatment 690 283 40 -


Hastelloy C-22  Standards and Specifications


Bar/Rod Fitting  Forging Sheet/Plate Pipe/Tube
ASTM B574  ASTM B366 ASTM B564 ASTM B575  ASTM B622,ASTM B619,ASTM B626

Hastelloy C-22 Available Products in Sekonic Metals

Hastelloy C-22 bars & Rods

Round bars/Flat bars/Hex bars, Size From 8.0mm-320mm, Used for bolts,fastners and other spare parts

Hastelloy C-22 welding wire & Spring wire

Supply in welding wire and spring wire in coil form and cut length.

Hastelloy C-22 sheet & plate

Widths up to 1500mm and lengths up to 6000mm,Thickness from 0.1mm  to 100mm.

Hastelloy C-22 seamless tube & Welded pipe

Standards size and  customized dimension can be produced by us with small tolerance

Hastelloy C-22 Forging Ring

Forging Ring or gasket,size can be customized with bright surface and precision tolerance

Hastelloy C-22 Fasteners

Hastelloy C-22 materials  in forms of Bolts,screws,flanges and other fasterners, according to clients specification.

Why Hastelloy C-22?

Nickel-Chromium-Molybdenum-Tungsten alloy with better overall corrosion resistance compared to any other Ni-Cr-Mo alloys,such as Hastelloy C-276,C-4 and alloy 625.
• Good resistance to pitting corrosion,crevice corrosion and stress corrosion cracking.
• Excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. 
• Offering optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. 
• Can be used in some headache environment for the universal property,or used in a variety of factory production.  
• Exceptional resistance to a wide variety of chemical process environments including strong oxidizers such as ferric acids,acetic anhydride,and seawater and brine solutions.
• Resists the formation of grain-boundary precipitates in the weld heat-affected zone,providing excellent as-welded conditions for process applications in chemical-based industries.

Hastelloy C-22 Application field:

 Widely used in the field of chemical and petrochemical,such as application in organic components containing chloride and catalytic systems.This material is especially suitable for high temperature,inorganic acid and organic acid (such as formic acid and acetic acid) mixed with impurities,sea water corrosion environments.Can be used to make the following main equipment or parts:
• The acetic acid/acetic anhydride                                                        • Acid leaching;
• The cellophane manufacturing;                                                          • The chloride system;
• The complex mixture acid;                                                                    • Electric galvanized trough roller;
• The expansion bellows;                                                                          The flue gas cleaning systems;
• The geothermal well;                                                                               • Hydrogen fluoride melting pot washer;
• The burning cleaner system;                                                                • The fuel regeneration;
• The pesticide production;                                                                     • Phosphoric acid production.
• The pickling system;                                                                                • The plate heat exchanger;
• The selective filtering system;                                                             • Sulfur dioxide cooling tower;
• The sulfonated system;                                                                          • Tube heat exchanger;