Hastelloy C22, also known as Alloy C22 is very similar to Hastelloy C276 and has good heat resistance and corrosion resistance. This material has resistance to pitting, stress corrosion cracking and crevice corrosion.

Both Hastelloy C22 and C276 are used in pollution control, chemical processing, waste treatment and seawater applications. There is little difference between the two alloys in corrosion resistance ability except for one process: Hastelloy C22 shows an improvement over Hastelloy C276 when it is used in certain saturated wet chlorine environments. However, C276 is used more due to supply and availability.

Hastelloy C22 has better overall corrosion resistance than other nickel based alloys available today, including Hastelloy C276 and Hastelloy C4 alloy and Inconel 625. C22 contains 22% chromium, whereas C276 contains 16%, which is one factor contributing to C22 improved performance.

Specifications:

UNS N06022, ASTM B574, ASTM B575, ASME B564,

Applications:

Oil and gas applications, Acetic acid, acid etching, flue gas scrubber systems, nuclear fuel reprocessing, pickling systems, plate heat exchangers, tubular heat exchanges, chlorination systems, incineration scrubber systems, waste water processing.