ASTM B366 N10276 Hastelloy C276 Nickel Alloy Steel Fitting Buttwelded B16.9

ASTM B366 N10276 Hastelloy C276 Nickel Alloy Steel Fitting Buttwelded B16.9

ASTM B366 is a standard for the manufacture, testing, and acceptance of pipe fittings. It specifies dimensional tolerances, chemical composition, mechanical properties, heat treatment, surface finish, and inspection requirements. N10276 is a material designation for a specific nickel-molybdenum-chromium alloy, more commonly known commercially as Hastelloy C-276.

N10276 is a tungsten-reinforced nickel-molybdenum-chromium alloy renowned for its exceptional all-around corrosion resistance. Its core properties include exceptional corrosion resistance, good thermal stability, and superior mechanical properties. N10276 performs exceptionally well in environments containing chloride ions, exhibiting excellent tolerance to wet chlorine, hypochlorite, and chlorine dioxide solutions. It maintains excellent mechanical properties in both acidic, reducing, and oxidizing environments, offering significant advantages over other alloys. Furthermore, due to its low carbon content and optimized chemical composition, N10276 exhibits virtually no intergranular corrosion.

ASTM B366 C276 Hastelloy C276 N10276 Nickel Alloy Steel Chemical Composition

ASTM B366 C276 Hastelloy C276 N10276 Nickel Alloy Steel Mechanical & Physical Properties

ASTM B366 Hastelloy C276 Nickel Alloy Steel Pipe Fittings Equivalent Grades

Comparison of ASTM B366 N10276 Alloy Steel with other Similar Alloy Steel

• vs. N06022 (Hastelloy C-22): N06022 alloy has a higher chromium content and generally performs better in oxidizing media and mixed acid environments, and is considered an upgrade to N10276.
• vs. N06625 (Inconel 625): N06625 alloy has higher strength but a lower molybdenum content, making it less corrosion-resistant than N10276 in strongly reducing acid environments.
• vs. N06455 (Hastelloy C-4): N06455 alloy contains no tungsten and has a very low cobalt content, providing better stability after aging treatment, but its overall corrosion resistance is slightly lower than that of N10276.

ASTM B366 Hastelloy C276 Nickel Alloy Steel Pipe Fittings Application

• Chemical Process Industry: Reactors, heat exchangers, and piping systems, particularly those working with highly corrosive media such as sulfuric acid, hydrochloric acid, phosphoric acid, and acetic acid.
• Oil & Gas: Used in downstream refining and petrochemical equipment, particularly those processing high-sulfur crude oil.
• Pollution Control: Flue gas desulfurization systems, scrubbers, and wastewater treatment equipment.
• Pharmaceutical Industry: Process piping requiring extremely high purity and corrosion resistance.
• Pulp & Paper Industry: Equipment and piping in bleaching plants and chemical recovery systems.
• Pharmaceutical Industry: Process piping requiring extremely high purity and corrosion resistance.