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Inconel 625 vs Hastelloy C276 – What’s the Difference

Inconel 625 Vs Hastelloy C276

When it comes to selecting the right alloy for a given application, there’s no “one size fits all” solution. It’s important to understand the properties of each alloy to make an informed decision. Today we will be discussing two popular nickel-based alloys – Inconel 625 and Hastelloy C276 – exploring their similarities, differences, and when each might be best used in various applications.



What Is Inconel 625?

Inconel 625 is a nickel-chromium-molybdenum alloy with excellent corrosion resistance, high strength, and good weldability. Due to its low carbon content, Inconel 625 is not susceptible to intergranular corrosion. This makes it ideal for applications where exposure to chlorides or other corrosive agents is likely. The alloy has been used in the aerospace industry since the 1960s due to its ability to withstand extreme temperatures or pressures without being deformed or weakened.

What Is Hastelloy C276?

Hastelloy C276 is also a nickel-chromium-molybdenum alloy but with added tungsten and cobalt elements that further increase its corrosion resistance. The additional elements make this alloy even more resistant to stress corrosion cracking (SCC) than Inconel 625 in certain applications. For example, Hastelloy C276 can withstand prolonged exposure to sulfuric acid, while Inconel 625 cannot. Like Inconel 625, this superalloy has excellent weldability properties as well as high strength qualities which makes it suitable for both welding and fabrication operations.

When To Use Inconel 625 vs Hastelloy C276?

Though both alloys are highly corrosion resistant, they are best suited for different types of applications depending on the environment they will be exposed to. For instance, if you require an alloy with superior SCC resistance than either one can provide, then consider using Super Duplex Stainless Steel such as Alloy 2507 or Alloy Zeron 100 instead due to their improved pitting resistance when compared with both alloys mentioned here today. Also, take into consideration other factors, such as cost, before making your final selection since Super Duplex Stainless Steel can be considerably more expensive than either Nickel based alloy discussed here today. Decision time! Which one should you choose? If your application requires good general corrosion resistance in an acidic environment, then go with Hastelloy C276 as it offers superior SCC resistance compared to Inconel 625, but if your application does not involve any SCC potential, then the lower cost of Inconel 625 may make it a better choice over Hastelloy C276 in certain cases.

Difference Between Inconel 625 and Hastelloy C276

Inconel 625 vs Hastelloy C276

There are several key differences between Inconel 625 and Hastelloy C276. First, Inconel 625 contains a higher percentage of chromium than Hastelloy C276. Second, Inconel 625 has better resistance to organic acids than Hastelloy C276. Third, Inconel 625 has better resistance to pitting and crevice corrosion than Hastelloy C276. Finally, Inconel 625 is more expensive than Hastelloy C276.


Inconel 625 is typically used in applications where high temperatures, high pressures, or aggressive chemicals are present. Some common applications for Inconel 625 include gas turbine engines, chemical processing equipment, and marine environments. Hastelloy C276 is typically used in applications where high temperatures or aggressive chemicals are present. Some common applications for Hastelloy C276 include chemical processing equipment and marine environments.


The main advantages of Inconel625 over Hastelloy C276 are its higher chromium content and better resistance to organic acids. The main advantage of Hastelloy C276 over Inconel625 is its lower cost.




In conclusion, both Inconel 625 and Hastelloy C276 are excellent Nickel based alloys designed for extreme environments; however, deciding which one is best depends greatly on the specific application requirements that need to be taken into account before making a decision on which material would be most suitable for your needs. Be sure to weigh out the pros and cons of each option carefully before settling on either one so that you get maximum value from your chosen material selection!

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