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HASTELLOY C22 (N06022)

C-22® Alloy
UNS N06022
Trade Name: Hastelloy®

HASTELLOY® C-22® alloy is a versatile nickel-chromium-molybdenum- tungsten alloy with better overall corrosion resistance than other Ni-Cr-Mo alloys available today, including HASTELLOY C-276 and C-4 alloys and alloy 625. C-22 alloy has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions. Also, C-22 alloy offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. Because of such versatility it can be used where upset conditions are likely to occur or in multi-purpose plants.

C-22 alloy has exceptional resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, chlorine, hot contaminated solutions (organic and inorganic), formic and acetic acids, acetic anhydride, and seawater and brine solutions.

C-22 alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition. (Information provided by Haynes International, Inc.)

ASME Boiler and Pressure Vessel Specifications
Sheet/ Plate Forgings Weld Fittings Rod and Bar Tubing – Welded/ Smls Pipe – Welded/ Smls Bolting- Bolts/ Nuts Filler Metals
SB575 SB574/ SB564 SB366 SB574 SB626/ SB622 SB619/   SB622 SB574-“C”/ SB574-“C” ERNiCrMo-10


ASME Boiler and Pressure Vessel Chemical Requirements for Sheet/Plate
Note: all percentages max unless otherwise specified
Mo Cr Fe W Co C Si Mn V P S Ni
12.5-14.5 20.0-22.5 2.0-6.0 2.5-3.5 2.5 0.015 0.08 0.50 0.35 0.02 0.02 Rem


ASME Boiler and Pressure Vessel Mechanical Properties for Sheet/Plate
Tensile Strength, Min ksi  Yield Strength, (0.2% offset), Min, ksi  Min. Elongation in 2″, % Density lb/in³
100 45 45.0 0.314


Limitation of Liability and Disclaimer of Warranty: In no event will South Coast Industrial Metals or any of its affiliates be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. South Coast Industrial Metals, Inc. assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.