Inconel vs Hastelloy: Which Is Better for Corrosive Environments?

Inconel and hastelloy are two types of materials that are often employed in extreme environments, particularly where corrosion is an issue. But which of the two is best for those conditions? Let us review the variances between Inconel and Hastelloy metals.

Understanding the variances between Inconel and Hastelloy what’s different?

There are in fact alloys based on different metals, such as Inconel and Hastelloy. Inconel alloy flange is composed of nickel,  chromium and iron and Hastelloy is composed of nickel,  molybdenum and chromium. Each of these different combinations of metals results in alloys with distinct properties, allowing for their use in different sectors.

Corrosion resistance of Inconel and Hastelloy in aggressive environments

High corrosion resistance is just one of the reasons that Inconel and Hastelloy are used in extreme environments. A2 and A4 materials are resistant to corrosion by water, acids, and alkalis. But, while Inconel is known for it’s excellent oxidation resistance, Hastelloy excels in resisting pitting and crevice corrosion.

Inconel or Hastelloy?

So, which of these two alloys is best suited for corrosive environments? The answer does in fact depend very much on which circumstances apply. Incase if the environment is oxidizing than go for Inconel. Conversely, assuming the environment has pit and crevice corrosion risks, I would recommend Hastelloy.

Know why Inconel and Hastelloy are special in their corrosive environments

Some distinctive properties of Inconel and Hastelloy for corrosive environments. For example, Inconel alloy sheet exhibits high temperature strength and good oxidation resistance. Hastelloy however shows high resistance to pitting and crevice corrosion and thus can be used at places where the above mentioned types of corrosion take place.

The following selection guidelines include specific system/environment factors that should be considered Get Both The Inconel and Hastelloy valves are available on the leading online marketplace.

To make a decision between Inconel and Hastelloy

It is important to structure your decision based on several specific environmental and use factors. If the conditions in the application involve oxidation, then Inconel is the best bet. If the pitting and crevice corrosion resistance of the environment is too good then, you can choose Hastelloy as a better option. As also mentioned is the temperature and pressure conditions of the environment, since this may have an influence on the properties of the alloys.

In summary 

Inconel vs. Hastelloy is a difficult decision that will depend on what you are looking for in an alloy when faced with the material grade options. The choice of which alloy to use is ultimately dictated by the particular environmental circumstances. With a knowledge of how each alloy inherently behaves and a bit of consideration for your specific environment, it is possible to select the optimal alloy for your application. Therefore, whether it’s Inconel or Hastelloy alloy bars, ensure to select the alloy that perfectly matches your environment’s requirements. Trust Fangpeng with all your alloy.