What is C276 Hastelloy？

C276 Hastelloy is a nickel-molybdenum-chromium-iron-tungsten series nickel-based alloy, which is considered to be one of the most corrosion-resistant modern metal materials. It can resist the erosion of wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salt, and also shows good corrosion resistance in low and medium temperature hydrochloric acid. Therefore, in the past three decades, C276 Hastelloy has been widely used in harsh corrosive environments such as chemical, petrochemical, flue gas desulfurization, pulp and paper, and environmental protection.

C276 Hastelloy has excellent mechanical properties with high strength and toughness. This makes it a certain difficulty in machining, and its strain hardening tendency is very strong. When the deformation rate reaches 15%, its strength is about twice that of 18-8 stainless steel. In addition, C276 Hastelloy also has a medium temperature sensitization zone, and its sensitization tendency increases with the increase of deformation rate. When the temperature is high, C276 Hastelloy is easy to absorb harmful elements, resulting in the deterioration of its mechanical properties and corrosion resistance.

In terms of corrosion resistance, C276 alloy is suitable for a variety of chemical process industries containing oxidizing and reducing media. Its higher molybdenum and chromium content makes it resistant to chloride ions, while tungsten further enhances its corrosion resistance. C276 is one of the few materials that can withstand the corrosion of humid chlorine, hypochlorite and chlorine dioxide solutions, and the alloy has significant corrosion resistance to high concentrations of salt chloride solutions such as ferric chloride and copper chloride.

C276 Hastelloy has a wide range of applications, especially in chemical and petrochemical fields. It can be used in components exposed to chlorinated organics and in catalytic systems. This material is particularly suitable for use at high temperatures, in inorganic and organic acids (such as formic and acetic acid) mixed with impurities, and in seawater corrosive environments.