ThePipingMart Blog Products Hastelloy C22 Pipe – Composition, Properties and Uses

Hastelloy C22 Pipe – Composition, Properties and Uses

Hastelloy C22 Pipes - Composition Properties And Uses

The success of any industrial application depends largely on the quality of materials used in its construction. High-performance alloys like Hastelloy C22 are often employed in the chemical and petrochemical industries. Hastelloy C22 is a nickel-chromium-molybdenum-tungsten alloy known for its excellent resistance to corrosion and high temperatures. This blog post will dig deeper into Hastelloy C22 Pipe, composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance.


What is Hastelloy C22 Pipe?

C22 Hastelloy Welded Pipe are high-performance alloy pipes made of nickel, chromium, and molybdenum alloys. They offer excellent corrosion resistance in a wide range of environments, including most organic and inorganic acids and chemical process media. Their good ductility and formability make them ideal for fabrication into complex shapes or sizes to suit specific piping requirements. These pipes also have outstanding weldability, making them an excellent choice for many engineering applications such as heat exchangers, columns and reactors.

Hastelloy C22 Pipe Composition 

Hastelloy C22 Seamless Pipe comprise a combination of nickel, chromium, molybdenum, tungsten, and small amounts of iron and cobalt. It has a very low carbon content, which makes it highly resistant to corrosion in reducing environments. The addition of chromium gives the alloy its resistance to oxidizing media, while molybdenum and tungsten enhance its ability to resist corrosion in solutions containing chlorides and other halides.

Hastelloy C22 Ni C Mo Mn Si Fe P S Co Cr
Balance 0.010 max 12.5 – 14.5 0.50 max 0.08 max 2 – 6 0.02 max 0.02 max 2.5 max 20 – 22.5

Hastelloy C22 Pipe Physical Properties 

The physical properties of Hastelloy C22 Welded Pipe include a density of 8.69 g/cm³, a melting point of 1399°C, and a thermal conductivity of 10.4 W/m.K. It also has a coefficient of thermal expansion of 11.7 µm/m°C, and its magnetic permeability is less than 1.01. These properties make C22 Hastelloy Bush Hex Pipe suitable for high-temperature applications and environments with different pressure levels.

Hastelloy C22 Pipe Mechanical Properties 

Hastelloy C22 Seamless Pipe have excellent mechanical properties, including high tensile strength and resistance to fatigue and creep. It has a minimum yield strength of 41,000 psi and a maximum hardness of 95 HRB. The alloy is also highly malleable and can be formed into different shapes using various fabrication methods.

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.69 g/cm3 1399 °C (2550 °F) Psi – 45000 , MPa – 310 Psi – 1,00,000 , MPa – 690 45 %

Hastelloy Pipe C22 Pipe Equivalent

Hastelloy C22 N06022 2.4602 NiCr21Mo14W NW 6022

Hastelloy C22 Pipe Uses 

UNS N06022 Pipe are used in various applications, including chemical processing, pharmaceutical production, food production, and other industries that require high-temperature and highly corrosive environments. It is often used to manufacture heat exchangers, reactors, and distillation columns, among other equipment in the chemical and process industries.

Hastelloy C22 Pipe Heat Treatment 

C22 Hastelloy Bush Hex Pipe are heat-treated before use to improve their mechanical properties. The recommended heat treatment involves annealing at a temperature of 2050-2150°F for 30-60 minutes, followed by rapid quenching in water or air. This process helps relieve the material’s stress, improve flexibility, and enhance its resistance to localized corrosion.

Hastelloy C22 Pipe Corrosion Resistance 

UNS N06022 Pipe are renowned for their outstanding resistance to oxidizing and reducing environments. It is resistant to pitting, crevice corrosion, and stress corrosion cracking, which makes it highly desirable in highly corrosive environments.


C22 Hastelloy Welded Pipe are an invaluable asset to the chemical and petrochemical industries. Its excellent resistance to corrosion, high temperatures, and pressure make it an ideal material for manufacturing various equipment in these industries. With its outstanding physical and mechanical properties, heat and corrosion resistance, it is no surprise that Hastelloy C22 pipes are highly sought after.

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