What Is Hastelloy C276 Made Of?

What is Hastelloy C276 made of?

Overview

HASTELLOY C276 is a nickel-chromium-molybdenum wrought alloy that is considered to be the most widely used corrosion resistant alloy available. The alloy resists the formation of grain boundary precipitates in the weld heat affected zone, making it suitable for most chemical process applications in the as-welded condition. Alloy C-276 also exhibits excellent resistance to pitting, stress corrosion cracking, and oxidizing atmospheres up to 1900°F. Alloy C-276 has excellent resistance to a wide range of chemical environments.

Properties

HASTELLOY C276 is one of the few alloys that is resistant to wet chloride gases, hypochlorites, and chlorine dioxide solutions.

HASTELLOY C276 has excellent resistance to solutions of strong oxidizing salts such as ferric chloride and cupric chloride.

HASTELLOY C276 is not susceptible to grain boundary precipitates in the as-welded condition, making it suitable for many chemical process applications

Applications

Digesters and bleaching plants in the paper industry.

Components exposed to sour gases.

Flue gas desulfurization plant equipment.

Evaporators, heat exchangers, filters and mixers used in sulfuric acid environments.

Sulfuric acid reactors.

Organic chloride process equipment.

Process equipment using halide or acid catalysts.

Some typical applications for HASTELLOY C276 include equipment components in chemical and petrochemical organic chloride processes and processes using halide or acid catalysts. Other industry applications include pulp and paper (digesters and bleaching areas), scrubbers and piping for flue gas desulfurization, pharmaceutical and food processing equipment.

HASTELLOY C-276 is a nickel-chromium-molybdenum alloy that has universal corrosion resistance unmatched by any other alloy. It has excellent resistance to a wide range of chemical process environments, including ferric and cupric chlorides, thermally contaminated mineral acids, solvents, chlorine and chlorine contamination (organic and inorganic), dry chlorine, formic and acetic acids, acetic anhydride, seawater and brine solutions, and hypochlorite and chlorine dioxide solutions. Alloy C276 also resists the formation of grain boundary precipitates in the weld heat affected zone, allowing it to be used in most chemical processes in the as-welded condition. It has excellent resistance to pitting and stress corrosion cracking.

HASTELLOY C276 plate in 0.044" thick condition heat treated at 2050°F, rapid quenched, has an average Olson Cup depth of 0.48". Alloy C-276 can be successfully fabricated by a variety of methods. The alloy tends to harden, but with proper care, the alloy can be easily hot and cold formed. Complete information on welding, machining and forming is available