The predominant alloying ingredient is typically the transition metal nickel. The primary function of the Hastelloy super alloys is that of effective survival under high-temperature, high-stress service in a moderately to severely corrosive, and/or erosion-prone environment where more common and less expensive iron-based alloys would fail, including the pressure vessels of some nuclear reactors, chemical reactors, distillation equipment, and pipes and valves in chemical industry. Although a super alloy, Hastelloy does experience degradation due to fabricating and handling. Electropolishing or passivation of Hastelloy can improve corrosion resistance.
In what applications is Hastelloy C-276 used?
Pulp and paper production
Chemical processing components like heat exchangers, reaction vessels, evaporators, and transfer piping
Sour gas wells
Pharmaceutical and food processing equipment
Flue gas desulfurization systems
Pollution control stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans and fan