Hastelloy C-276 alloy belongs to nickel - mo - Cr - iron - tungsten nickel-based alloy. It is one of the most corrosion-resistant modern metal materials. Mainly resistant to wet chlorine, all kinds of oxidizing chloride, chloride salt solution, sulfuric acid and oxidizing salt, in low temperature and medium temperature 1 have good corrosion resistance. Therefore, in the past 30 years, in harsh corrosive environment, such as chemical, petrochemical, flue gas desulfurization, pulp and paper, environmental protection and other industrial fields have a quite wide range of applications. The corrosion data of Hastelloy C-276 alloy are typical, but cannot be used as a standard, especially in unknown environment, the selection of materials must be tested. There is not enough Cr in Hastelloy C-276 alloy to resist corrosion in strong oxidizing environments such as hot 1. The alloy is mainly produced for chemical process environment, especially in the presence of mixed acid, such as flue gas desulfurization system discharge pipe.

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When alloying elements are added to steel, iron and carbon, the basic components of steel, interact with alloying elements. The purpose of steel alloying is to improve the microstructure and properties of steel by the interaction of alloying elements with iron and carbon and the influence on the phase diagram of iron and carbon and the heat treatment of steel.