Hastelloy C-276 and Hastelloy X are both relatively common Hastelloy alloys. They are also nickel-chromium-molybdenum alloys. Therefore, when selecting materials, you may have the following questions:

What are the differences in their performance?

What fields are they suitable for?

In this article, we will compare Hastelloy C-276 and Hastelloy X from all aspects. We believe that by reading, you will not only have a deeper understanding of these two materials, but also make a wiser choice when selecting specific materials.

Purity is an important indicator for the high-temperature performance of superalloys. The better the harmful trace elements in the alloy are controlled, the better the high-temperature stability of the alloy.

Since Hastelloy C-276 and Hastelloy X are both used at high temperatures, they have strict control over trace elements.

The difference is that Hastelloy C-276 has stricter control over silicon, which gives it better instantaneous performance, while Hastelloy X has stricter control over boron, which is beneficial to the alloy's persistence performance.

In addition, Hastelloy X also has strict control over titanium content, which is to prevent the precipitation of a special harmful phase (TCP).

Hastelloy C-276 and Hastelloy X both have good comprehensive corrosion resistance.

The difference is that Hastelloy C-276 has a relatively high molybdenum content, so it is more resistant to reduction corrosion. Hastelloy X has a higher chromium content and has better oxidation resistance.

Overall, Hastelloy C-276 has better corrosion resistance than Hastelloy X.

Although Hastelloy C-276 and Hastelloy X are both suitable for use at high temperatures, Hastelloy X has better high-temperature performance.

On the one hand, Hastelloy X has a certain amount of cobalt added. As we all know, cobalt is very helpful for the high-temperature performance of the alloy.

In addition, Hastelloy X has stricter requirements for carbon content, which helps the alloy maintain good mechanical properties at high temperatures.

Finally, Hastelloy X has a higher chromium content, which is more resistant to high-temperature oxidation of the alloy.

In general, Hastelloy C-276 has better mechanical properties. This is mainly because a large amount of molybdenum and a part of tungsten have a very effective solid solution strengthening effect. At the same time, the higher nickel content also makes Hastelloy C-276 have better plasticity.

However, since the chromium content of Hastelloy X is between 20% and 25%, this range of chromium content has a relatively special solid solution strengthening. Therefore, the mechanical properties of Hastelloy X are also quite good.

It can be seen that Hastelloy C-276 is more used in applications that require corrosion resistance (such as marine, chemical, etc.), while Hastelloy X is more used in high-temperature applications (such as aerospace, nuclear power, etc.).

The price of Hastelloy C-276 is significantly higher than Hastelloy X. On the one hand, Hastelloy C-276 contains more molybdenum and tungsten, both of which are quite expensive. On the other hand, Hastelloy X contains more iron, which significantly reduces the cost.

Hastelloy C-276 and Hastelloy X are both nickel-chromium-molybdenum alloys. The difference is that Hastelloy C-276 has a higher content of molybdenum and tungsten, which gives it better corrosion resistance and mechanical properties. On the contrary, Hastelloy X has a higher content of cobalt, chromium and iron. This not only gives it better high-temperature performance, but also brings it a more favorable price.

As a professional nickel alloy supplier, we can provide a variety of high-quality Hastelloy C-276 and Hastelloy X products. If you have any needs in this regard, please do not hesitate to contact us.