Is Hastelloy C276 compatible with HCL?
Description
C-276 alloy is a solid solution strengthened nickel-molybdenum-chromium alloy with a small addition of tungsten. C-276 alloy exhibits excellent corrosion resistance in a wide range of harsh environments and media. Like many other nickel alloys, it has good ductility and is easily formed and welded. The alloy is suitable for most industrial environments where corrosive chemical environments are present and other alloys fail.
Industries & Applications
C-276 alloy is widely used in many industries, including chemical and petrochemical processing, oil and gas, power generation, pharmaceuticals, pulp and paper, and wastewater treatment. End uses include chimney linings, ducts, dampers, scrubbers, flue gas reheaters, heat exchangers, reaction vessels, evaporators, transmission ducts, and many other highly corrosive applications.
Corrosion Resistance
C-276 alloy is one of the most versatile corrosion resistant alloys available today. It is suitable for a wide range of environments from moderately oxidizing to strongly reducing. C-276 alloy has excellent corrosion resistance to sulfuric, hydrochloric, formic, acetic, chlorides, solvents, wet chloride gases, hypochlorites, and chlorine solutions. C-276 alloy has excellent resistance to phosphoric acid at all temperatures below boiling point and concentrations below 65%. In strong oxidizing environments, the limiting factor is the low chromium content, which means that high temperature concentrated nitric acid environments are not ideal.
C-276 alloy has excellent corrosion resistance to pitting, stress corrosion cracking, and oxidizing environments. C-276 alloy also exhibits resistance to seawater corrosion in crevice conditions that may cause aggressive corrosion to other commonly used materials.
Fabrication and Heat Treatment
C-276 alloy can be formed by a variety of cold and hot working processes. Like other nickel alloys, C-276 alloy work hardens rapidly, but can be cold formed by aggressive methods such as deep drawing, press forming, and stamping. Hot forming should be done at temperatures between 1600°F and 2250°F (870°C and 1230°C), with heavier sections heated to at least 2000°F before forming. It is recommended that the material be annealed after processing at temperatures between 2050°F and 2150°F, followed by a rapid quench in a protective atmosphere or in a stirred reducing quench tank. To obtain a reducing quench tank, add 2% (by volume) ethanol or propanol to water.
