Author
Home > Engineering > What is the Difference Between Hastelloy C22 and C276?

Guilherme Mazui

•4 minutes to read

What is the Difference Between Hastelloy C22 and C276?

🆚 Go to Comparative Table 🆚

Hastelloy C22 and C276 are both high-performance alloys known for their corrosion resistance and are widely used in various industries, such as chemical processing, oil and gas, and marine engineering. However, there are some differences between the two:

  1. Composition: Hastelloy C22 has a higher chromium content (22%) and a lower molybdenum content (13%) compared to Hastelloy C276, which has 16% chromium and 16% molybdenum.
  2. Corrosion Resistance: Due to its higher chromium content, Hastelloy C22 offers better overall corrosion resistance, particularly in oxidizing environments. It has been proven to be more resistant to pitting, crevice, and stress corrosion cracking compared to Hastelloy C276.
  3. Weldability: Hastelloy C22 has better weldability qualities, including increased resistance to intergranular corrosion caused by the aftereffects of extreme welding heat.
  4. Cost: Hastelloy C276 is generally cheaper than Hastelloy C22, making it more commonly used despite C22's superior corrosion resistance.

In summary, Hastelloy C22 is an enhanced version of Hastelloy C276, offering better corrosion resistance and weldability. However, the choice between the two alloys depends on factors such as the specific application, required corrosion resistance, and budget constraints.

On this page
  • What is the Difference Between Hastelloy C22 and C276?
  • Comparative Table: Hastelloy C22 vs C276

    • Comparative Table: Hastelloy C22 vs C276

    Hastelloy C22 and C276 are both corrosion-resistant alloys used in various applications, but they have some differences in their compositions and properties. Here is a comparison table highlighting the key differences between Hastelloy C22 and C276:

    Property Hastelloy C22 Hastelloy C276
    Composition Higher chromium content, lower molybdenum content Lower chromium content, higher molybdenum content
    Corrosion Resistance Better overall corrosion resistance, especially in oxidizing environments Good corrosion resistance, but not as strong as C22 in oxidizing environments
    Pitting and Crevice Corrosion Resistance Excellent, due to higher chromium content Good, but not as strong as C22
    Weldability Better weldability properties, including increased resistance to intergranular corrosion Good weldability properties, but not as strong as C22
    Price Higher cost due to higher purity raw materials and tighter control of trace elements Lower cost compared to C22
    Applications Aerospace, chemical processing, pharmaceuticals, and oil & gas industries Chemical processing, oil & gas, marine engineering, and pollution control industries

    In summary, Hastelloy C22 offers better corrosion resistance, especially in oxidizing environments, and better weldability properties compared to Hastelloy C276. However, Hastelloy C22 is more expensive due to its higher purity raw materials and tighter control of trace elements. The choice between the two alloys depends on factors such as budget, specific application requirements, and material availability.

    Read more:

    Guilherme Mazui

    Guilherme Mazui is graduated in journalism from the Federal University of Minas Gerais (UFMG) and a master's degree in Communication from the University of São Paulo (USP). In addition, he has experience in advertising writing and has worked as a content editor in several companies.