difference between hastelloy c22 and c276 alloy strip

Difference Between Hastelloy C22 And C276 Alloy Strip

Hastelloy C276 and C22 alloys strips, both of them are nickel-based alloys, belong to the Hastelloy C series of materials invented by Haynes International in the United States, and have very similar properties.

What is the difference between them?

Let’s keep reading.

what is hastelloy c22 alloy strip

Hastelloy C22 alloy strip is a nickel-chromium-molybdenum alloy materials.

The chief attributes of which are resistance to both oxidizing and non-oxidizing chemicals, and protection from pitting, crevice attack, and stress corrosion cracking.

Its high chromium content provides much higher resistance to oxidizing media than the family standard C276 alloy strip.

Like other nickel alloys strips, Hastelloy C22 alloy is very ductile, exhibits excellent weldability, and is easily fabricated into industrial parts.

What is Hastelloy C276 Alloy Strip?

what is hastelloy c276 strip

Hastelloy C276 strip is a nickel-chromium-molybdenum super nickel alloy strip with an addition of tungsten designed to have excellent corrosion resistance in a wide range of severe environments.

This alloy is resistant to the formation of grain boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in an as welded condition.

The high chromium content provides the Hastelloy C276 strip good oxidation resistance in continuous service at temperatures up to 1500 Deg F (816 Degree).

Alloy C276 strip has exceptional resistance to a wide variety of chemical environments. Hastelloy C276 strip is used for components that must operate in corrosive conditions, such as chemical processing, waste management, and paper manufacturing systems.

Difference Between Hastelloy C22 And C276 Alloy Strip

Chemical Composition

The chemical components of grade C22 alloy strip is summarized in the following table:

Chemical Compositions
%NiCrMnCMoSiFe
MaxBal.22.50.50.01514.50.086
Min 20 12.5 2

HASTELLOY® C-22® alloy is a registered trademark of Haynes International, Inc.

The chemical components of grade C276 alloy strip is summarized in the following table:

%NiCrMoWCoCMnSiPSFeV
MinBalance14.515300000040
MaxBalance16.5174.52.50.0110.080.040.0370.35

HASTELLOY® is a registered trademark of Haynes International, Inc.

Mechanical Properties

Hastelloy C22 Alloy Strip Mechanical Properties

Product FormTensile Strength (ksi).2% Yield Strength (ksi)Elongation %Hardness (HRb)
Hastelloy C22 Alloy Strip112536289

Hastelloy C276 Alloy Strip Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Alloy C276 Strip Material
Product FormTensile Strength (ksi).2% Yield Strength (ksi)Elongation %
Hastelloy C276 Alloy Strip115.554.660

Applications

What Is Hastelloy C22 Alloy Strip Used For?

  • Pharmaceutical industries fittings and welded tubes
  • Cellophane manufacturing industries
  • Chlorination systems
  • Pesticide production lines
  • Incineration scrubber systems
  • Chemical process industry in equipment like flue gas scrubbers
  • Chlorination systems
  • Pulp and paper bleach plants
  • Pickling systems and nuclear fuel reprocessing
  • Waste water processing industries

What Is Hastelloy C276 Alloy Strip Used For?

Hastelloy C276 strips are used in a wide range of applications across multiple industries.

The most common uses for this alloy strip are in the chemical processing industry, but it is also frequently used for pollution control, pulp and paper industry, pharmaceuticals, specialty chemicals, pickling operations, nuclear fuel reprocessing, food processing and handling of radioactive waste.

The versatility of Hastelloy C276 strips makes it a popular choice with manufacturers as its durability and resistance to corrosion mean that it will be able to withstand the rigors of industrial processes without corroding or losing its structural integrity.

One of the most common uses of Hastelloy C276 strips is in the oil and gas industry where they are used in power generation plants to protect the turbines from damage due to corrosion.

They are also used in desalination plants where they can be relied upon to resist stress corrosion cracking.

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