Hastelloy C-22HS (UNS N07022)

Hastelloy C-22HS (UNS N07022) alloy is the premier nickel-chromium-molybdenum, corrosion-resistant material for oil and gas industry use. Cold working of the alloy at levers between 30 and 65% result in high room temperature yield strengths. It exhibits exceptional resistance to sour gas environments.

Equivalent Grades

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Hastelloy C-22HSHastelloy C-22HSN07022

Chemical Composition, %

AlloyCSiMnPSCrNiCoMoWAlTaBFe
Hastelloy C-22HS≤0.01≤0.08≤0.50≤0.025≤0.01520.0-21.4Bal≤1.0015.5-17.4≤0.80≤0.50≤0.20≤0.006≤1.8

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HB
8.691325-1370125080035

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B637
Plate, Sheet and Strip
Pipe and TubeASTM B983
Welding Product
Others

Features

  • Excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions
  • Offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams
  • 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
  • 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.

Applications

  • Agitators and blenders
  • Shafting
  • Fan blades and hubs
  • Fasteners
  • Springs
  • Valves
  • Dies
  • Screws
  • Wellhead parts
  • Rings and gaskets