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The Hastelloy C22 alloy and the Hastelloy C276 alloy are both nickel, chromium, and molybdenum alloys, containing a high concentration of chromium compared to other Hastelloy alloys. These are both alloys consisting of several metals, however, a notable difference between Hastelloy C22 and C276 is the composition of the metals that make up these alloys. Due to this difference between the two alloys, Hastelloy C22 and C276, their applications in the chemical industry are different. As an example, Hastelloy C22 is very important due to its enhanced versatility and exceptional resistance to chloride-induced pitting, while Hastelloy C276 is very important due to its proven performance in a wide range of competitive chemicals, as well as its enhanced versatility.

There are many materials talked about in the industry, but few are actually produced in the product forms required for a project. Material selection is a combination of property, price, and product availability. In our industry, there are many materials mentioned and very few are produced. Our decision often comes down to deciding which is the most appropriate material for our purposes.

stainless steel SMO 254 pipes

Frequently, some of these alloys like Hastelloy ® C-22 ® and Hastelloy ® C-276 ® get mixed up and/or welded together, so it's not uncommon for them to get mixed up or welded together.

As a representation of a family of metals, Hastelloy is one of the most common types of metal used in Both C-22 and C-276 are part of the Hastelloy family, and their similarity can create confusion, but C-22 has a much higher corrosion resistance than C-276, and it has often been referred to as the upgrade over C-276.

There is a significant improvement in the corrosion resistance of C-22 with a higher percentage of chromium in it in an oxidizing environment, which allows it to last longer. Sodium chloride (NaCl), hydrochloric acid (HCl), and sulphuric acid (H 2 SO 4 ) are all common severe oxidizing mediums. The compound C-22 is also extremely resistant to ferric chlorides, cupric chlorides, acetic anhydride, formic and acetic acids, hot contaminated organic acids, brine solutions, and seawater.

The essential point which differs between Hastelloy C22 and Hastelloy C276 is the applications in which they are utilized according to their chemical elements. Due to its enhanced adaptability and chloride-induced pitting resistance, Grade C22 is a very important grade as it is highly adaptable. C276, compared to Hastelloy, is extremely effective in highly chemical environments as a result of its improved properties.


What is C22 Hastelloy?

The Hastelloy C22 alloy is also called a Superalloy, as it is made up mainly of chromium, molybdenum and nickel. This alloy is characterized by high resistance to oxidation and corrosion in both oxidizing and non-oxidizing environments.

The alloy C22 is designed to serve as a shield for metal against the formation of holes, known as pitting. 2.4602 has been designed in such a way that it protects itself from the formation of pitting caused by chloride. The key point to bear in mind is that stainless steel tends to be corroded, but Hastelloy C22 is designed to safeguard the Grade from this corrosion. As a result of its outstanding chemical compatibility, Hastelloy C-22 is also capable of causing stress corrosive cracks as well as crevice attack.

In addition, C22 Hastelloy is more chromium-rich than other grade alloys. Hast C22 performs excellent weldability, followed by excellent ductility. On machinery units, smooth fabrication is achieved with Hastelloy 22. Among the applications of C22 Hast are marine units, heat exchangers, reactors, turbines, etc.

SMO 254 Pipes & Tubes

What is Hastelloy C276?

Material C-276, which is also known as Hast C276 or Hast C276, is an alloy composed of prime chromium, nickel, and molybdenum, and is also known as Hast C276. Besides, the material has an extremely high level of chrome as compared to other Hastelloy grades. The distinction between c22 and c276 is that c276 has a lower amount of chromium than c22 Grade. It is a highly versatile metal, which is why C-276 is one of the top grades in the Hastelloy group. In addition, the Hastelloy C-276 is known to be the first grade of the Hastelloy alloy group.

Exceptional Hastelloy group has excellent ductility, and C276 alloy is no less than that. UNS N10276 alloy is also very weldable. Hastelloy materials present extraordinary resistance to corrosion, especially stress corrosion cracking. C-276 Hastelloy material is an extremely effective tool to combat oxidizing and non-oxidizing acidic corrosion, since it contains a high concentration of molybdenum and chromium. It has an exceptional resistance to pitting in spite of the presence of halides as well as chlorides, a property provided by his C-276. Chemical sulfide creates stress cracking that is again resisted by his C-276.


  • Chromium 22%
  • Nickel 56%
  • Molybdenum 13%
  • Tungsten 3%
  • Cobalt 2.5%
  • Iron 3%


  • Chromium 16%
  • Nickel 57%
  • Molybdenum 16%
  • Tungsten 4%
  • Cobalt 2.5%
  • Iron 5%

What We Do for Hastelloy C22 and C276

  • Buttweld Fittings
  • Forged Fittings
  • Flanges
  • Pipe / Tubes

What is C276 used for?

In many industries, especially in the chemical and petrochemical processing industry, as well as the oil and gas industry, power generation, pharmaceuticals, pulp and paper production, and waste water treatment, alloy C-276 is widely used.