Hastelloy C-276® is a solid solution strengthened nickel-molybdenum-chromium alloy, which features a small amount of tungsten as well. This super alloy is renowned to have incredible corrosion resistance properties, which makes it perfect for use in a number of severe environments. Much like a number of other nickel alloys, Alloy C-276 is highly ductile and can be welded and formed easily. Hastelloy C-276® is also referred to as Inconel® C-276.

There are a high molybdenum and nickel content present in Hastelloy C-276®, which makes it especially resistant to the crevice and pitting corrosion in distinct reducing environments. While on the other hand, the chromium content in Alloy C-276 provides resistance to oxidizing media. The low carbon content in this super alloy reduces carbide precipitation during the process of welding, so as to maintain corrosion resistance in as-welded structures. Alloy C-276 is known to be resistant to the formation of grain boundary precipitates in the weld heat-affected zone, and therefore is perfect for use in the majority of chemical process applications. It is also used popularly in environments related to industrial and municipal waste treatment, pollution control, recovery of sour natural gas, as well as pulp and paper production.

While there are multiple variations of Hastelloy nickel alloy available, Inconel® C-276 is the one that is used the most, extensively. This super alloy has managed to perfectly suit certain industrial settings that have aggressive chemical environments, where multiple types of other alloys have failed.

The corrosion resistance of Hastelloy C-276®

The Hastelloy C-276® is famed for being one of the most versatile and corrosion-resistant alloys available in the contemporary world. It tends to exhibit incredible resistance capacity in an extensive variety of chemical process environments, including the ones involving chlorine, seawater, cupric and ferric chlorides, acetic and formic acids, chlorine dioxide solutions, as well as hot contaminated organic and inorganic media. Alloy C-276 is also known for its high level of resistance to stress and pitting corrosion cracking.

The common applications of Hastelloy C-276®

• Flue gas desulfurization systems
• Sour gas wells
• Pulp and paper production
• Waste treatment
• Pharmaceutical and food processing equipment

Hastelloy C-276® is also used for making a variety of chemical processing components like transfer piping, evaporators, reaction vessels, and even heat exchangers. In many cases, stack-gas reheaters, dampers, ducts, scrubbers, pollution control stack liners, as well as fans and fan housings tend to be made up of Inconel® C-276.

Fabricating Hastelloy C-276®

Hastelloy C-276® is a super alloy that can be impact extruded, hot-upset and forged. Even though this nickel alloy tends to work harden, people can successfully have it deep-drawn, punched, press formed or successfully spun. Almost all the common welding processes can be used with Alloy C-276. However, it is recommended that people do not use the oxyacetylene and submerged arc processes when trying to fabricate items that are meant for use in corrosion service.

The Alloy C276 welding products tend to be used as a matching composition filler material, for the purpose of welding C276 alloy wrought and cast products, as well as for cladding of steels or weld overlay.

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