Hastelloy C-276
NiMo16Cr15W

*Unified Numbering System (USA)

Characteristics and main uses

Hastelloy C-276 is a nickel-chrome-molybdenum alloy with tungsten. It is characterized by:

• Extraordinary resistance across a wide range of corrosive, watery media; in particular oxidizing and reducing acids
• Particularly high resistance against chloride-induced crevice, pitting and stress corrosion

Main uses

Hastelloy C-276 can be used in many chemical processes with both oxidizing as well as reducing media. The high chrome and molybdenum concentrations make the alloy resistant to chloride ion attacks. The tungsten content further increases this resistance. Hastelloy C-276 is one of the few materials that are resistant against chlorine gas, hypo-chlorite and chlorine dioxide solutions. The alloy is characterized by excellent resistance against concentrated solutions of oxidizing salts (such as iron III and copper chloride).

Hastelloy C-276 has a broad field of application in the chemicals and petrochemicals industry, for components in organic processes containing chlorides, and for catalytic systems. The material can be used especially in cases where hot, contaminated mineral acids, solutions or organic acids (such as formic acid and acetic acid) and sea water occur.

• Examples of fields of application:
• Paper and pulp industry, e.g. for digestion and bleaching tanks
• Washers, agitators and wet ventilators in flue gas desulfurization systems
• Equipment and components for acid gas applications
• Reactors for acetic acid production
• Sulfuric acid coolers
• Methylene diphenyl isocyanate (MDI)
• Manufacturing and processing of contaminated phosphoric acid

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