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Hastelloy Stainless Steel C-276 alloy exhibits excellent corrosion resistance to most corrosive media in both oxidized and reduced states. Excellent resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking. Alloys are suitable for various chemical process industries containing oxidizing and reducing media. The higher content of molybdenum and chromium enables the alloy to resist the corrosion of chloride ions, and tungsten further enhances its corrosion resistance. Hastelloy Stainless Steel C-276 is one of the few materials that can withstand the corrosion of humid chlorine gas, hypochlorite, and chlorine dioxide solutions. This alloy has significant corrosion resistance to high concentrations of chloride solutions, such as ferric chloride and copper chloride.

Hastelloy Stainless Steel C-4 is an austenitic low-carbon nickel molybdenum chromium alloy with the characters of low carbon, silicon, iron, and tungsten content. This chemical composition exhibits excellent stability at 650-1040℃, improves resistance to intergranular corrosion, and can avoid blade line corrosion sensitivity and weld heat affected zone corrosion under appropriate manufacturing conditions. Hastelloy Stainless Steel C-4 has excellent corrosion resistance to most corrosive media, especially in the reduced state. Excellent resistance to localized corrosion in halides.

Hastelloy Stainless Steel C-2000 is a new type of NI-CR-MO alloy, which is based on C4 alloy with increased chromium content and added copper, greatly improving the alloy's resistance to oxidation and corrosion by reducing media. It is currently the alloy with good resistance to H2SO4 corrosion in this series, but its resistance to intergranular corrosion is not as good as C4. Therefore, it is feasible to use this alloy in H2SO4 environment. Has corrosion resistance: including sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, organic acids, chlorides, alkali metals, pitting corrosion, crevice corrosion, stress corrosion cracking. The Hastelloy Stainless Steel C2000 data shows superior resistance to pitting and crevice corrosion compared to the industry standard C-276 alloy. Its forming welding and machining forming performance is similar to that of C-276 Hastelloy Stainless Steel C2000 alloy, which solves the dilemma in the design of this alloy. Combining high chromium content with molybdenum and copper results in excellent resistance to reducing environmental corrosion without sacrificing metallurgical stability. This alloy is mainly used for chemical processing equipment and components that contain both oxidizing and reducing corrosive media, such as reactors, heat exchangers, valves, pumps, fasteners, etc. It is more suitable for the environment of fluorine-containing catalysts in HF acid production and use