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Hastelloy C
- Jun 06, 2018 -

Hastelloy C  has the following features

1.High temperature, corrosion resistant alloy

2.Hastelloy C alloy contains a large amount of Cr, Mo and other elements, and has a single-phase austenite structure.

3.Corrosion resistant alloys with many excellent properties have excellent resistance to oxidative and moderate reducing corrosion.



1.Control the minimum content of iron and chromium to prevent the formation of β-phase Ni4Mo.

2. Excellent corrosion resistance to reducing environment.

3. Excellent resistance to moderate concentrations of sulfuric acid and many non-oxidative acids.

4. Excellent resistance to chloride ion stress corrosion cracking (SCC).

5. Excellent resistance to various organic acid corrosion.


Material properties

HastelloyC is a face-centered cubic lattice structure. By controlling the content of iron and chromium at the minimum, the process brittleness is reduced, and the Ni4Mo phase is prevented from being precipitated at 700-870°C.

The nickel-molybdenum alloy Hastelloy C has a very low carbon and silicon content and reduces the precipitation of carbon and other impurities in the heat-affected zone of the weld. Therefore, the weld has sufficient corrosion resistance. Alloy Hastelloy C-2 has good corrosion resistance in reducing media, such as various temperature and concentration of hydrochloric acid solution. It also has good corrosion resistance in moderate sulfuric acid solution (or contains a certain amount of chloride ion). It can also be used in acetic acid and phosphoric acid environments. Alloys have the best corrosion resistance only when they are in the proper metallurgical state and pure crystal structure.

Alloy Hastelloy C has a wide range of applications in the fields of chemistry, petrochemicals, energy manufacturing and pollution control, especially in industries such as sulfuric acid, hydrochloric acid, phosphoric acid, and acetic acid.