Nickel C276

Applications

Used widely in chemical process equipment (reactors, heat exchangers, evaporators, piping) exposed to highly corrosive media, as well as pollution-control equipment such as stack liners, ducts, dampers, scrubbers, and stack-gas reheaters, and in pulp and paper, pharmaceutical, and pollution-control industries where a broad range of aggressive chemicals must be resisted.

Corrosion Resistance

Hastelloy C-276 is a nickel-molybdenum-chromium-tungsten alloy recognized as one of the most broadly corrosion-resistant commercial alloys, with the high molybdenum and tungsten content providing resistance to pitting and crevice corrosion in both oxidizing and reducing environments, and the low carbon content minimizing grain-boundary carbide precipitation in weld heat-affected zones.

Heat Treatability

Supplied and used in the mill-annealed (solution-annealed) condition; the alloy is not age-hardenable and derives its properties from the solid-solution-strengthened, annealed microstructure rather than precipitation hardening.

Weldability

The alloy can be fabricated and welded using standard procedures (typically GTAW/GMAW with matching or C-22 filler metal) and resists grain-boundary carbide precipitation in the weld heat-affected zone, making it suitable for use in the as-welded condition for most chemical process applications.