Alloy C276 (UNS N10276) is an austenitic nickel-molybdenumchromium alloy with a small addition of tungsten. It is one of the premier corrosion resistant materials available for process industries. Alloy C276 has excellent corrosion resistance in both oxidizing and reducing environments.

The combination of the high molybdenum and chromium content, along with the addition of tungsten, make Alloy C276 highly resistant to chloride stress corrosion cracking, pitting, crevice corrosion and general corrosion.

Alloy C276 can operate in oxidizing atmospheres up to 1900°F (1038°C), however, the alloy lacks sufficient chromium content to operate successfully in the most strongly oxidizing environments like hot, concentrated nitric acid.

The low carbon content of Alloy C276 enables the alloy to be utilized in the as-welded condition. It cannot be hardened by heat treatment, but can be hardened by cold working. The alloy has a higher work-hardening rate than the austenitic stainless steels which should be taken into consideration.

Alloy C276 can be easily welded and processed utilizing standard shop fabrication practices for austenitic stainless steels and nickel based alloys.

Applications

• Air Pollution Control - flue gas desulfurization systems - stack liners, absorbers, ducts, dampers, stack gas re-heaters and fans

• Chemical Processing - heat exchangers, pressure vessels, tanks, evaporators, piping, flanges and fittings, pumps and valves

• Oil and Gas Production - sour gas service components

• Pharmaceutical Production - reactor vessels, piping, flanges and fittings, pumps and valves

• Pulp and Paper - bleaching vessels and digestors

• Waste Treatment - incinerators for toxic, industrial and municipal waste