Hastelloy C22 wire- A versatile and highly corrosion-resistant alloy

Hastelloy C22 alloy is a nickel-chromium-molybdenum alloy having high corrosion resistance to various environments. It also shows resistance to crevice corrosion, stress corrosion cracking, pitting, intergranular attack and oxidation. Hastelloy C22 is a variant of Hastelloy C276 and is more resistant to SCC and chloride-induced localized corrosion as compared to Inconel 625 and Hastelloy C4. In this alloy, the chromium content is increased to 21% (approx.) and molybdenum content is decreased to 13% (approx.) and this alloy has 1.7% Co and 0.2% V.

Hastelloy C22 wire is the best choice for extreme temperature and highly corrosive conditions, for example, this alloy wire can withstand extremely high temperature when Sulfur is present in a coal production plant and can withstand corrosion where solid waste is found such as a containment unit or a boiler. Hastelloy C22 wire is easily formable and weldable, therefore, it can adapt to any method such as a shielded metal, gas tungsten arc, or gas metal arc. This alloy wire naturally prevents the growth of grain boundary precipitates which is not the case with other alloys. Hastelloy C22 wire is versatile and is suitable for situations where devices with irregular shapes must be used in areas which would be highly corrosive for normal wiring.

Hastelloy C22 is practically used in areas where formic, nitric and ferric acids are present and in areas having cupric chlorides which normally destroy other alloys in a short period of time. Therefore, Hastelloy C22 is used by various industries such as sea water industrial equipment, chemical processing and nuclear fuel processing for many of their wiring needs. These industries can’t afford a wiring failure due to extreme conditions as that can be hazardous, therefore, they use Hastelloy C22 which is completely reliable.

Vanadium present in the alloy C22 makes it different than other alloys and vanadium is used to increase the existing properties of the metals. Among the 12 corrosion-resistant alloys under the Hastelloy brand, Hastelloy C22 has vanadium which combines with chromium, nickel, tungsten and molybdenum to produce an alloy with its characteristics up to extreme level.

Applications of HastelloyC22 include pollution control, marine, seals, fasteners, springs, medical devices, sour gas production components, pesticide production components, nuclear fuel reprocessing and components used in flue gas equipment and is used in various industries such as oil/gas extraction, chemical processing and power generation, paper processing, power, waste disposal etc. Hastelloy C22 can be formed as plate, wire, rod, forging, bar, sheet, tube and various other standard forms. This alloy cannot be hardened heat treating and can be formed as cut-to-lengths, continuous coils and precision cutting.

Hastelloy C22 has excellent resistance to crevice corrosion, pitting, stress corrosion cracking, oxidizing aqueous media including mixtures containing oxidizing acids or nitric acid with chloride ions and wet chlorine. Hastelloy C22 manufactured from NiWire also provides excellent resistance to environments in which oxidizing and reducing conditions are encountered in process streams. Hastelloy C22 is used in multipurpose plants or where conditions can be upset due to its versatility.