Hastelloy alloys are known as high-performance, corrosion-resistant materials, commonly regarded as superalloys. The category includes over twenty specialized grades, each developed through a unique combination of secondary and tertiary alloying elements for use in specific applications. Their main distinction stems from their unique, even exceptional resistance to highly corrosive environments when they out-perform stainless steels. In addition to having superior corrosion resistance, Hastelloy alloys exhibit excellent properties in terms of fabrication, possess thermal stability and mechanical strength, and maintain microstructural integrity at elevated temperatures, along with enhanced resistance to aggressive acids such as hydrochloric and sulfuric. These properties make them a popular material choice for critical applications in industries such as chemical processing, aerospace and other demanding industries.

At Jade Alloys we offer a range of specialty Hastelloy products, engineered to suit your specific needs. We engage in capacity to assist you with your choice of grade and the best performance and the service life of your application.

Overview of Hastelloy grades

Both hastelloy grades are tailored to handle specific corrosive environments and industrial needs.

Hastelloy C-22

Hastelloy C-22 is a versatile nickel-chromium-molybdenum-tungsten alloy known for its superior overall corrosion resistance compared to many other nickel-based alloys. It demonstrates outstanding protection against pitting, crevice corrosion and stress corrosion cracking. In addition, it provides excellent resistance to a wide range of aqueous media, including wet chlorine, nitric acid, and chloride-containing oxidizing acids or mixed acid environments.

Hastelloy C-276

Hastelloy C-276 is a highly corrosion-resistant alloy valued for its ability to withstand both oxidizing and moderately reducing conditions. It offers excellent resistance to stress corrosion cracking and localized forms of attack such as pitting. This alloy performs reliably in aggressive chemical process environments, including strong mineral acids, chloride-rich solutions, dry chlorine, seawater, brine, acetic acid, formic acid and other challenging corrosive media.

Density Comparison of Hastelloy C-22 and Hastelloy C-276

	Hastelloy C-22	Hastelloy C-276
Density, g/cm³	8.69	8.89
Density, lb/in.³	0.314	0.321

Composition of Hastelloy

The composition of Hastelloy alloys comes from a careful balance of elements, each contributing to corrosion resistance, strength, and durability.

Nickel (Ni) is the principal element. It establishes a solid foundation. It provides a high level of corrosion resistance in general.

Molybdenum (Mo): This element significantly enhances resistance. It is capable of combating reducing acids. Hydrochloric acid is an example of such an acid. Another example is sulfuric acid. Molybdenum also prevents pitting. It assists in the prevention of crevice corrosion.

Chromium (Cr) is indispensable. It aids in the resistance to oxidizing conditions. Nitric acid serves as an illustration. Another example is wet chlorine gas. A protective layer of chromium is present on the surface.

Tungsten (W) is frequently incorporated. It enhances resistance to a variety of acids. It is effective for both oxidizing and reducing varieties. The alloy is also rendered more durable at elevated temperatures.

Iron (Fe): This has the potential to alter its mechanical properties. Additionally, it may influence the expense. The quantity of iron in each grade is meticulously monitored.

Modern Hastelloy varieties contain minimal carbon. This is crucial. It mitigates welding complications. These issues could potentially reduce corrosion resistance.

Industrial Applications of Hastelloy Alloys

With exceptional corrosion resistance, high-temperature stability and strength, Hastelloy is widely used in critical industries. Grades such as C-276, C-22 and B-2 play a vital role in following industries :

Chemical Processing Equipment: Hastelloy is used in reactors, heat exchangers, and evaporators exposed to aggressive acids and mixed chemical environments. Its resistance ensures safe and long-term plant operations.
Nuclear Industry: Components such as reactor parts and fuel reprocessing systems use Hastelloy for its stability in radioactive and corrosive environments at high temperatures.
Aerospace Applications: Combustion chambers, turbine engines and exhaust systems rely on Hastelloy’s strength at extreme heat, improving efficiency and safety in flight operations.

Hastelloy’s Physical Properties

Hastelloy is more than just a metal that doesn’t rust easily. It is also a preferred pick because of its physical qualities. It is chosen for important uses. It works nicely in places that are quite hard on things.

Melting Point: Hastelloy alloys usually melt between 1260°C and 1400°C (2300°F and 2550°F). For example, Hastelloy C276 melts between 1325°C and 1370°C. Because of their high melting point, the alloys stay strong even at high temperatures.

Hardness: Hastelloy alloys are usually stronger and harder than regular stainless steels. They are usually durable enough to resist wear, with a Rockwell B rating of 85 to 100 or above.

Thermal Conductivity: Hastelloy alloys have a modest ability to conduct heat, which is similar to many types of stainless steel. Hastelloy C276, for instance, has a thermal conductivity of roughly 9.8 W/m·K at ambient temperature. This is significant for things like heat exchangers.

Thermal Expansion: When heated, Hastelloy expands at a moderate rate, which is comparable to how austenitic stainless steels do. When designing parts that will have big temperature variations, this must be taken into account to avoid stress and warping.

Hastelloy Suppliers in India

At Jade Alloys, we not only supply prime quality Hastelloy’s but also offer our technical assistance to help you select the exact grade for your application. By choosing us you will receive many benefits, including a longer life of your equipment, improved operational safety, and better overall efficiency on your most demanding application. We offer many high demand grades including Hastelloy C276 Pipe, Hastelloy C276 Seamless Pipe, Hastelloy C276 Welded Pipe, Hastelloy C22 Pipe, Hastelloy C22 Seamless Pipe, and Hastelloy C22 Welded Pipe. All sizes can be supplied, including wall thickness up to 100mm, in order to fit all industrial needs.