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Hastelloy C 276

With the addition of tungsten, Hastelloy C276 is a superalloy composed of nickel, molybdenum, and chromium with excellent corrosion resistance in a wide range of harsh environments. When exposed to reducing environments, the high nickel and molybdenum content of the nickel steel alloy make it particularly resistant to pitting and crevice corrosion, while the high chromium content provides resistance to oxidising environments.


In as-welded structures, the low carbon content reduces carbide precipitation during welding, resulting in improved corrosion resistance. When used in an as-welded condition, this nickel alloy is resistant to grain boundary precipitates forming in the weld heat-affected zone, which makes it suitable for most chemical process applications. Hastelloy C-276 is a wrought alloy of nickel, chromium, and molybdenum that is very resistant to corrosion. Because this alloy is resistant to grain boundary precipitates in the weld heat-affected zone, it can be used in most chemical processes. Another thing: it's also resistant to pitting and stress corrosion cracking, as well as oxidising environments up to 1900F. Alloy C-276 is very resistant to chemicals.

Chemical Analysis :

The chemical composition nickel Hastelloy C 276 is outlined in the following table.

- Ni Cr Mn Mo C Si Fe
Max % Bal 16.5 1.0 17.0 0.010 0.08 7.0
Min % 14.5 15.0 4.0

Mechanical Properties :

- Ultimate Tensile Yield Strength (0.2% OS) Elong. in 2 in. (50.8mm) or 4D min., % R/A Hardness
Min 100 KSi 41 KSi 40
Min (Metric) 690 MPa 283 MPa


  • Digesters and bleach plants in the paper industry.
  • Components exposed to sour gas.
  • Equipment for flue-gas desulfurisation plants.
  • Evaporators, heat exchangers, filters and mixers used in sulfuric acid environments.
  • Sulfuric acid reactors.
  • Organic chloride process equipment.
  • Equipment for processes utilizing halide or acid catalysts.
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