Monel 400 and Hastelloy C-276 are both excellent corrosion-resistant alloys. However, from a chemical composition point of view, they are very different. Therefore, in practical applications, they often play different roles.

In this article we will compare Monel 400 and Hastelloy C-276 in detail from 11 aspects. I believe you will have a better understanding of the material selection of these two alloys in the future.

Generally speaking, Hastelloy C-276 has stricter control of harmful elements than Monel 400. The main reason for this difference is that Monel 400 tends to be used at room temperature, while Hastelloy C-276 is used in a wider temperature range. At high temperatures, the microstructure of the alloy becomes more unstable. At this time, if the content of trace elements is too much, harmful phases will easily precipitate, which will seriously affect the instantaneous and durable properties of the alloy.

Monel 400 and Hastelloy C-276 are both corrosion-resistant alloys. The difference is that the corrosion resistance of Monel 400 comes from the copper element, while the corrosion resistance of Hastelloy C-276 comes from chromium and molybdenum.

Copper and chromium are both antioxidant elements. The difference is that copper's oxidation resistance fails at high temperatures. Chromium maintains excellent oxidation resistance at any temperature.

Molybdenum is an element resistant to reducing corrosion. And its resistance to reducing corrosion can be maintained at most temperatures.

Therefore, there are two differences in the corrosion resistance of Monel 400 and Hastelloy C-276:

1) Monel 400 can only resist corrosion at room temperature, while Hastelloy C-276 can resist corrosive media over a wide temperature range.

2) The corrosion resistance of Monel 400 is limited to resistance to oxidation corrosion. Hastelloy C-276, which contains a large amount of molybdenum, has better overall corrosion resistance.

Monel 400 and Hastelloy C-276 are both solid solution alloys. Therefore, they all have good plasticity.

However, Hastelloy C-276 has significantly higher strength. This is mainly due to the large amounts of molybdenum and tungsten in Hastelloy C-276. Both elements can effectively solid solution strengthen alloys. Monel 400 has almost no effective solid solution strengthening elements.

It can be seen that Hastelloy C-276 is more widely used than Monel 400. Moreover, Hastelloy can also be used for various applications of Monel 400. This is consistent with our analysis above.

Since Hastelloy C-276 is better than Monel 400 in all aspects of performance, you must have guessed that Monel 400 has a certain price advantage.

First, Hastelloy C-276 contains a large amount of molybdenum and some tungsten. Prices for both metals are high. This makes its raw material cost higher than Monel 400.

Secondly, due to the solid solution strengthening effect of Hastelloy C-276, it is also more difficult to process, which increases the processing cost of the alloy.

Therefore, while Hastelloy C-276 can replace Monel 400 in most situations, it does so at a greater cost. This is why Monel 400 can still be widely used in the fields it is good at.

Hastelloy C-276 has better high temperature resistance, corrosion resistance and strength than Monel 400. However, Monel 400 has a lower price. Therefore, in the fields where Monel 400 is applicable, it is more cost-effective. However, at high temperatures, Hastelloy C-276 should be chosen.

We offer very cost-effective Monel 400 and Hastelloy C-276 materials. If you have any needs in this regard, please do not hesitate to contact us.