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

Hastelloy C22 Flanges – Composition, Properties and Uses

Hastelloy C22 Flanges - Composition Properties And Uses

Hastelloy C22 is a nickel-chromium-molybdenum-tungsten alloy highly resistant to various corrosive environments. This unique alloy is used in various industrial applications, including chemical processing, pollution control, and other harsh environments. The WNR 2.4602 Flanges are an integral component of this alloy and play a significant role in ensuring the system works flawlessly. This blog will discuss the composition, physical and mechanical properties, heat treatment, corrosion resistance, and other important aspects of Hastelloy C22 Flanges.

Hastelloy C22 Flanges Composition

The C22 Hastelloy Flanges are made from a composition that includes Nickel (62.9%), Chromium (22%), Molybdenum (13%), and Tungsten (3%). This combination of metals enhances the alloy’s resistance to oxidizing and reducing environments while maintaining its exceptional mechanical properties. The carbon and silicon content in the alloy is also kept intentionally low to prevent carbide precipitation.

Grade C Mn Si Co S Ni Cr Fe Mo W V P
Hastelloy C22 0.010 max 0.50 max 0.08 max 2.5 max 0.02 max Bal 20 – 22.5 2 – 6 12.5 – 14.5 2.5 – 3.5 0.35 max 0.02 max

Hastelloy C22 Flanges Physical Properties

Hastelloy C-22 Ring spacers Flanges are known for their excellent physical properties, primarily high temperature and corrosion resistance. The density of the alloy is around 8.69 g/cm3, which makes these flanges relatively lightweight. The alloy’s melting point is around 1399°C, and it has a thermal conductivity of 9.7 (at 100°C). The flanges also offer exceptional resistance to thermal shock.

Hastelloy C22 Flanges Mechanical Properties

The strength of UNS N06022 Flanges, both in terms of tensile and yield, is impressive. The alloy performs exceptionally well under high-stress situations, and its flexibility and toughness are excellent. The elongation at break is around 54%, making these flanges ideal for high-pressure applications.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Hastelloy C22 8.69 g/cm3 1399 °C (2550 °F) Psi – 1,00,000 , MPa – 690 Psi – 45000 , MPa – 310 45 %

Hastelloy C22 Flanges Equivalent 

Hastelloy C22 2.4602 N06022 NW 6022 NiCr21Mo14W

Hastelloy C22 Flanges Uses

ASTM B564 UNS N06022 Flanges are used in various industries, including chemical, petrochemical, nuclear, and power generation. These flanges are essential to pipelines, heat exchangers, reactors, and other critical equipment in these industries. These industries’ high-temperature and corrosive environments require robust and reliable flanges, making Hastelloy C22 Weld Weld Flanges the perfect choice.

Hastelloy C22 Flanges Heat Treatment

C22 Hastelloy Pipe Flanges can be heat-treated to further enhance their mechanical properties. Annealing at 1020°C to 1149°C can provide excellent resistance to stress corrosion cracking. The alloy can also be hot-worked between 1232°C to 954°C and cold-worked to improve its mechanical properties.

Hastelloy C22 Flanges Corrosion Resistance

One of the critical benefits of Hastelloy C22 Slip On Flange is their exceptional corrosion resistance. The alloy can withstand many corrosive environments, including oxidizing and reducing environments, hot contaminated organic and inorganic media, and salt solutions. The alloy is also resistant to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for use in harsh environments.



In conclusion, Hastelloy C22 Blind Flanges are an exceptional choice for critical applications with high-temperature and corrosive environments. These flanges’ composition, physical and mechanical properties, heat treatment, and corrosion resistance make them a reliable and robust choice for various industries. If you require high-performance flanges for your application, consider Hastelloy C22 Flanges.

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