4 Things You Should Know About Hastelloy C276

Hastelloy C276 is a nickel-molybdenum- chromium wrought alloy with a small amount of tungsten. It is widely used in the chemical process and associated industries. It is available in various commercial markets, such as plates, sheets, strips, wires, pipes, tubes, and covered electrodes.

Hastelloy C276 offers reliable performance, making it suitable for geothermal, solar energy, oil and gas, and pharmaceutical industries. Hastelloy C276 tubing shows high resistance to many aggressive chemicals. As it has high chromium, molybdenum, and tungsten content, the alloy conveys exceptional resistance to pitting and crevice corrosion in reducing environments. The chromium content allows it to show resistance to oxidizing media. It is considered the most versatile corrosion-resistant alloy available. Hastelloy C276 can withstand the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide.

Here are a few essential features, characteristics, and applications of Hastelloy C276-

Applications

Hastelloy C276 is used in reactors, heat exchangers, and columns in the chemical process industry (CPI). The superalloy is well suited to many industrial processes. It is also used in the petrochemical, oil and gas, and pharmaceutical industries. It is used to recover “sour” natural gas and for the desulphurization of flue gas equipment. Hastelloy C276 also finds use in pollution control, pulp and paper production, water desalination, and municipal waste treatment plants.

Welding

The nickel-chromium-molybdenum content in the superalloy alleviates concern over the welding. Hastelloy C276 can be welded easily by the commonly used welding methods. It is malleable, easy to form and weld. In the welding process, you need to avoid excessive heat input. You can use the superalloy in “as-welded” conditions for corrosive applications without applying any more heat treatment.

Resistance Properties

Hastelloy C276 shows resistance to chloride-induced stress corrosion cracking. It also offers resistance to seawater crevice corrosion. Hastelloy C-276 alloy exhibits high resistance to chloride-induced pitting and crevice attack. It also has excellent resistance to critical inorganic acids, even in its welded form. The chromium-molybdenum content allows it to show opposition to both oxidizing and non-oxidizing acids. It can also resist robust solutions of oxidizing salts, such as ferric and cupric chlorides.

Heat Treatment

The wrought forms of the superalloy are generally furnished in the heat-treated condition. Annealing for Hastelloy C276 is done at a temperature between 2050°F and 2150°F. The alloy can be hot forged, hot rolled, hot upset, hot extruded, and hot-formed. For hot forming, the specified temperature range is 1600 and 2250°F, and heavy forming at a temperature above 2000°F. The cold-worked parts should be re-annealed to optimize their corrosion resistance properties. The superalloy uses conventional cold working procedures for hard-working purposes. It can be cold-formed using deep drawing, press forming, and punching.

To Conclude:

Hastelloy C276 is a versatile material, and its strong resistance properties render it useful in many industries. It shows excellent corrosion resistance in reducing environments and aggressive media, good machinability, fabrication, and weldability, making it suitable for varied uses.

An Essential Guide on Benefits and Applications of C276 Pipes

Alloy C276 pipe is made from a nickel-molybdenum-chromium alloy with tungsten addition that has good corrosion resistance in various harsh situations. Because of the high molybdenum content, this alloy is particularly resistant to pitting and crevice corrosion. The low carbon content reduces carbide precipitation during welding, preserving corrosion resistance in as-welded structures.

In a range of severe conditions and media, Alloy C-276 has exceptional corrosion resistance. It’s ductile, like many other nickel alloys, and can be easily shaped and welded. In most industrial applications where harsh chemical conditions exist, and other alloys have failed, this alloy is used.

The pulp and paper business employs wood as a key raw resource to produce high-quality pulp, paper, and other cellulose using the proper bleaching vessels and digesters. Wood pulp is bleached when you use the bleaching vessels, and the strongest appears whiter. On the other hand, Digesters are made of wood chips burned to a high temperature with sodium hydroxides and even sodium sulfide to modify the pulp by dissolving the lignin binder dramatically. White and back liquors are corrosive substances in cooking that can damage the wall of the interior parts.

Chloride, as well as chlorine-dependent compounds, are used in the above process. On the other hand, Hastelloy alloy c276 pipe and tube develop first-class corrosion resistance in the great majority of chloride environments. It has both acidic and alkaline properties, making it the optimum choice for vessel bleaching and digester content.

What is Hastelloy?

Nickel-molybdenum alloy Hastelloy is a nickel-molybdenum alloy. Hastelloy comes in a variety of grades, several of which are nickel-chromium-molybdenum alloys. Each of these grades has been tailored for a distinct application, although they are all corrosion-resistant. Hastelloy is made tougher by molybdenum, which makes it stronger at high temperatures and ideal for welding. These alloys are simple to work with and form. They may be forged, and cold worked, and have high ductility.

Hastelloy is a suitable choice for moderate to severe corrosive conditions because of its remarkable resistance to severely oxidizing and reducing chemicals. In the chemical processing and petrochemical industries, it is often used for pipes and valves. It’s also great for pressure vessels and heat exchangers, and it’s utilized in nuclear and chemical reactors.

Industries and applications of c 276 alloy

Chemical and petrochemical processing, oil and gas, power generating, pharmaceutical, pulp, paper production, and wastewater treatment are just a few industries that use alloy C-276. Stack liners, ducts, dampers, scrubbers, stack gas reheaters, heat exchangers, reaction vessels, evaporators, transfer pipework, and many other highly corrosive applications are among the end-use applications.

Because C276 pipe comes in various shapes and sizes, including bar, plate, pipe fittings, welding wire, pipe, and tube, it would be easier for industries to use it for a variety of purposes. It refers to the number of corrosion-resistant flexible alloys available on the market. It offers great resistance to a wide range of chemical processes, including ferric and cupric chloride, hypochlorite, and other brine, without posing any harm. It has a low carbon content, which helps prevent grain boundary carbide precipitation during welding, preserving the heat component of the welded joints’ corrosion resistance. This resistance is against localized cracking, pitting, and stress corrosion cracking, among other things.