Hastelloy C276 Flanges

Sep 29

Hastelloy C276 is a nickel-molybdenum-chromium alloy with tungsten addition and has excellent corrosion resistance in a wide range of corrosive environments. The alloy also exhibits high pitting and crevice corrosion resistance, making it an ideal material for use in components exposed to aggressive chemical environments such as acids and chlorides. This blog post aims to overview the properties, characteristics, and applications of an important component of Hastelloy C276 the flange.

What are Hastelloy C276 Flanges?

Hastelloy C276 Flanges are corrosion-resistant alloy flange fittings used for applications requiring superior resistance to stress corrosion cracking, pitting, erosion and general corrosion. They are manufactured from a nickel-molybdenum-chromium base with added tungsten and copper, which gives them high tensile strength, ductility and excellent weldability. These flanges can be machined easily and have exceptional oxidation resistance even in high-temperature conditions.

Properties and Characteristics of Hastelloy C276 Flanges

Hastelloy C276 flanges have excellent mechanical properties and superior oxidation resistance in high-temperature applications. The flanges can withstand temperatures up to 1900°F without thermal fatigue. Besides, the C276 flanges offer excellent resistance to stress corrosion cracking, which makes them ideal for corrosive environments commonly found in chemical, petrochemical, and oil and gas industries.

Applications of Hastelloy C276 Flanges

Hastelloy C276 flanges are versatile components that find applications in numerous industries, including petrochemical, oil and gas, chemical processing, and marine industries. Hastelloy C276 flanges are commonly used in gas scrubbers, heat exchangers, water and wastewater treatment, chemical reactors, and other components exposed to corrosive environments. They are also used in flue gas desulfurization systems, where they resist the formation of sulfuric acid.

Manufacturing and Standards of Hastelloy C276 Flanges

Hastelloy C276 flanges are manufactured by casting and forging and are available in various sizes, shapes, and specifications. Standard flanges include weld-neck flanges, slip-on flanges, blind flanges, and threaded flanges. Flanges are typically made to ANSI, DIN, JIS, or BS standards and can be customized to meet specific customer requirements.

Advantages of Hastelloy C276 Flanges

Hastelloy C276 flanges have several advantages over other materials. They have high strength, resilience, and excellent corrosion resistance. Due to their excellent corrosion resistance, they offer longer service life, which reduces maintenance costs. Further, they offer excellent thermal resistance, which makes them ideal for high-temperature applications. They also have excellent resistance to pitting and crevice corrosion, which makes them ideal for applications in environments with high chloride content.

Maintenance and Usage of Hastelloy C276 Flanges

Hastelloy C276 flanges are highly durable components and require minimal maintenance. However, regular inspection is essential to prevent any leakage or damage to the component. Flanges should be inspected for corrosion, cracking, or damage. During usage, care should be taken to handle the flanges properly to prevent any physical damage. It is important to adhere to the manufacturer’s proper installation and usage guidelines.


Hastelloy C276 is a superior material used in components exposed to various corrosive environments. The flange is an essential component of the Hastelloy C276 material system. Hastelloy C276 flanges are versatile components that offer excellent mechanical properties, high corrosion resistance, and superior thermal resistance, which make them ideal for several industrial applications. Proper maintenance and usage of the flanges can prolong their service life and reduce maintenance costs. With their exceptional properties and advantages, Hastelloy C276 flanges are a popular choice for many industries.