Hastelloy C22, Inconel 22, Nickel 22, Alloy 22, Nicrofer 5621.
INCONEL alloy 22 (UNS N06022; W. Nr. 2.4602; NiCr21Mo14W) is a fully austenitic advanced corrosion-resistant alloy that offers resistance to both aqueous corrosion and attack at elevated temperatures. This alloy provides exceptional resistance to general corrosion, pitting, crevice corrosion, intergranular attack, and stress corrosion cracking. Alloy 22 has found numerous applications in the chemical/petrochemical processing, pollution control (flue gas desulfurization), power, marine, pulp and paper processing, and waste disposal industries.
At elevated temperatures, the high chromium level of INCONEL alloy 22 helps it resist oxidation, carburization, and sulfidation. Since it is nickel-base, alloy 22 resists high temperature attack by halides (e.g., chlorides and fluorides). With these attributes, the alloy is widely used to protect steel tubes and other components in coal-fired and waste-to-energy boilers.
Available Product Forms:
Pipe, tube, fitting, flange, sheet, strip, plate, round bar, flat bar, fastener, forging stock, hexagon and wire
Specifications
INCONEL alloy 22 is designated as UNS N06022 and Werkstoff Nr. 2.4602.
Rod, Bar, Wire and Forging Stock: ASTM B 462 (Rod, Bar and Forging Stock), ASTM B 564 & ASME SB 564 (Forgings), ASTM B 574 & ASME SB 574 (Rod, Bar and Wire), ASME Code Case 2226, ASME Code Case N-621, ISO 9723, ISO 9724, DIN 17752 (Rod & Bar), DIN 17753 (Wire), DIN 17754 (Forgings)
Plate, Sheet and Strip: ASTM B 575; ASTM B 906 & ASME SB 575; ASME SB 906, ASME Code Case 2226, ASME Code Case N-621, ISO 6208, DIN 17750
Pipe and Tube: ASTM B 619; ASTM B 775 & ASME SB 619; ASME SB 775 (Welded Pipe), ASTM B 622; ASTM B 829 & ASME SB 622; ASME SB 829 (Seamless Tube), ASTM B 626; ASTM B 751 & ASME SB 626; ASME SB 751 (Welded Tube), ASME Code Case 2226, ASME Code Case N-621, ISO 6207, DIN 17751.
Welding Products: Filler Metal 622 – AWS A5.14 / ERNiCrMo-10, Welding Electrode 622 – AWS A5.11 / ENiCrMo-10
Other Product Forms: ASTM B 366 & ASME SB-366 (Fittings) Composition – DIN 17744
Chemical Composition
Chromium………………………………………………20.0-22.5
Molybdenum ………………………………………….12.5-14.5
Iron ………………………………………………………..2.0-6.0
Tungsten …………………………………………………2.5-3.5
Cobalt ……………………………………………………..2.5 max.
Vanadium………………………………………………..0.35 max.
Carbon…………………………………………………….0.015 max.
Manganese ………………………………………………0.50 max.
Sulfur ……………………………………………………..0.02 max.
Silicon …………………………………………………….0.08 max.
Phosphorus …………………………………………….0.02 max.
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