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Alloy 22

A nickel-chromium-molybdenum grade, Alloy 22 exhibits excellent resistance to both oxidising and reducing environments.

With the addition of tungsten, alloy 22 provides exceptional resistance to pitting and crevice corrosion, in oxidising acid halide environments.


Product Form Size range from Size range to
Alloy 22 welding wire 0.89 mm 3.175 mm
Alloy 22 sheet & plate 0.96 mm 50.8 mm
Alloy 22 round tubing 6.35 mm 50.8 mm
Alloy 22 round bar 3.175 mm 279.4 mm
Alloy 22 pipe 0.375 in 8 in
Alloy 22 pipe fittings 0.375 in 8 in
Alloy 22 flanges 0.375 in 8 in

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    Pipe Fittings

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    Welding Consumables

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    Sheet & Plate

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    Round Bar

Chemical Analysis

% Ni Cr Mo Fe W Co C Mn Si V P S
Min Balance 20 12.5 2 2.5 - - - - - - -
Max - 22.5 14.5 6 3.5 2.5 0.015 0.5 0.08 0.35 0.02 0.02


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Perfect for applications in the Chemical Processing Industry

Alloy 22 can be used in a variety of applications including:

  • Reactors and pressure vessels
  • Nutsche pressure filters
  • Centrifugers and dryers
  • Agitators and mixers
  • Containment vessels and glove boxes
  • Pollution control equipments
  • Flue gas desulphurisation (FGD) lined ducts and dampers

About Alloy 22

Due to its high nickel content, Alloy 22 is immune to chloride-induced stress corrosion cracking.

The alloy demonstrates outstanding resistance to pitting and crevice corrosion particularly in high chloride containing environments.

Alloy 22 has exceptional resistance to a large range of chemical process environments, including ferric chlorides, chlorine, hot contaminated solutions, acetic acids, seawater and brine solutions. Alloy 22 is the ideal choice when considering alloys for use in extreme corrosive environments.

If you require any additional information on this alloy, then please don’t hesitate to contact us.


Melting Range:
89 HRB
Specific Heat Capacity:
381 J/kg.°C
Electrical Resistivity:
Curie Temperature:
< -196°C
Poisson's Ratio:


UNS Number:
Werkstoff Number:
ASTM B564, B574, B575, B619, B622, B626, B366, B462, B775
Download the Alloy 22 Data Sheet Download

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