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

CMC Letco Ind shall not be held liable for any type of damages resulting from the use of this information. The end user assumes all risk and liability in connection with the use of this information.