Alloy C-276 / UNS N10276 / W.Nr. 2.4819

Hastelloy C276


Hastelloy C276 (UNS N10276) is a nickel-based superalloy that contains significant amounts of molybdenum, chromium, and iron. The composition of Hastelloy C276 plays a significant role in its exceptional performance. It is primarily composed of nickel (up to 60%), allowing it to provide excellent resistance to a wide range of corrosive substances. Additionally, it contains approximately 16% molybdenum and 16% chromium, which contribute to its superior corrosion resistance and high-temperature stability. The presence of small amounts of tungsten and cobalt further enhances its mechanical properties, making it an ideal choice for challenging applications.

With its exceptional resistance to corrosion, Alloy C-276 is often used as a substitute for other alloys that have failed in corrosive environments. One of the key features of Hastelloy C276 is its ability to maintain its mechanical properties in high-temperature environments. It can withstand temperatures up to 1900°F (1040°C) without significant loss of strength, making it ideal for applications where exposure to extreme heat is a concern.

Another important aspect of Hastelloy C276’s composition is its low carbon content. The carbon content is limited to a maximum of 0.01%, which helps prevent the formation of carbides and maintains the alloy’s corrosion resistance in welded structures.

Alloy C276 Inventory

Product Form Size range from Size range to

Alloy C276 pipe

0.5 in 8 in

Alloy C276 tube

12 mm 260 mm

Alloy C276 pipe fittings

0.5 in 8 in

Alloy C276 flanges

0.5 in 8 in

Benefits of Using Hastelloy C276

Hastelloy C276 is a highly sought-after alloy due to its numerous advantages. From superior corrosion resistance to high-temperature stability and versatility in various environments, this alloy offers unparalleled performance and reliability.

Superior Corrosion Resistance

One of the most significant advantages of Hastelloy C276 is its outstanding resistance to corrosion. It excels in both oxidizing and reducing environments, making it highly reliable even in highly acidic or alkaline solutions. Whether it is exposure to harsh chemicals, saltwater, or acidic gases, Hastelloy C276 stands strong, providing reliable protection against corrosion.

Moreover, Hastelloy C276 exhibits exceptional resistance to localized corrosion, such as pitting and crevice corrosion. This property is particularly crucial in environments where stagnant or stagnant-like conditions are present. By preventing localized corrosion, Hastelloy C276 ensures the longevity and reliability of critical equipment and structures.

High-Temperature Stability

Another noteworthy benefit of Hastelloy C276 is its remarkable stability at high temperatures. It retains its mechanical properties even in extreme heat, making it suitable for applications that involve exposure to elevated temperatures. This quality is particularly valuable in industries such as chemical processing, where equipment often operates under rigorous conditions.

Furthermore, the high-temperature stability of Hastelloy C276 allows it to resist oxidation and maintain its structural integrity when exposed to high-temperature gases and combustion byproducts. This property not only contributes to the longevity of equipment but also ensures the safety and reliability of processes in high-temperature environments.

In addition, Hastelloy C276’s high-temperature stability extends to its ability to withstand thermal cycling, which is crucial in applications where the material experiences rapid temperature fluctuations. This capability minimizes the risk of thermal fatigue and extends the lifespan of equipment.

Versatility in Various Environments

Hastelloy C276 is renowned for its versatility and adaptability in different environments. It performs exceptionally well in a wide range of conditions, including highly corrosive, high-temperature, and even radioactive environments. This versatility makes it a go-to choice for a diverse array of industries, where dependability and longevity are paramount.

Moreover, Hastelloy C276’s adaptability extends to its compatibility with various fabrication methods, enabling engineers and designers to incorporate this alloy into an array of structures and equipment. Whether it is welding, machining, forming, or fabricating, Hastelloy C276 demonstrates remarkable versatility, allowing for flexibility in design and construction.

Furthermore, Hastelloy C276’s versatility is evident in its compatibility with a wide range of chemicals, making it suitable for applications involving different types of corrosive media. This attribute expands its potential applications in industries such as chemical processing, oil and gas, and pharmaceuticals.

Practical Applications of Hastelloy C276

Use in Chemical Processing Industries

In the chemical processing industry, where exposure to corrosive chemicals is a constant challenge, Hastelloy C276 is highly valued. It finds application in various components such as reactors, vessels, heat exchangers, and piping systems. Its exceptional corrosion resistance ensures the durability and safety of these critical equipment components, minimizing the risk of leaks or failures that can lead to environmental contamination or safety hazards.

Additionally, Hastelloy C276’s resistance to chlorine, chlorides, sulfides, and other aggressive chemical substances makes it highly suitable for use in industries involved in the production of chlorine, petrochemicals, and pharmaceuticals. Its reliability in challenging chemical environments provides a sustainable solution for long-term operations.

Role in Oil and Gas Industries

In the oil and gas industries, where exploration, production, and transportation take place under harsh and demanding conditions, Hastelloy C276 proves to be an excellent choice. Its resistance to corrosion, oxidation, and sulfide stress cracking makes it a reliable material for equipment such as valves, pumps, heat exchangers, and flue gas scrubbers.

Moreover, the oil and gas industry often encounters highly corrosive environments, such as those containing hydrogen sulfide or carbon dioxide. In such scenarios, Hastelloy C276 provides the necessary protection against corrosion, ensuring the longevity and integrity of critical equipment components.

Importance in Environmental Applications

The importance of Hastelloy C276 extends to environmental applications, where it plays a crucial role in pollution control and waste treatment. With its exceptional resistance to corrosive chemicals and high-temperature stability, Hastelloy C276 is utilized in equipment and systems designed for the treatment of industrial wastewater, flue gases, and incineration processes.

By withstanding the corrosive nature of pollutants and waste materials, Hastelloy C276 ensures the effectiveness and longevity of these environmental control systems. Its reliability allows for efficient and sustainable waste treatment and pollution control, contributing to a cleaner and healthier environment.

Comparing Hastelloy C276 with Other Materials

Hastelloy C276 vs Stainless Steel

Compared to stainless steel 304, Hastelloy C276 exhibits superior resistance to a wide range of corrosive substances. 304 Stainless Steel may be prone to pitting and crevice corrosion in certain environments, whereas Hastelloy C276 provides exceptional protection against these types of corrosion. Additionally, Hastelloy C276 offers better resistance to acidic environments, making it highly suitable for applications where stainless steel may corrode.

Hastelloy C276 vs Other Nickel Alloys

Hastelloy C276 stands out among other nickel alloys due to its broad resistance to corrosive media. In comparison to other nickel alloys, such as Inconel 625 and Monel 400, Hastelloy C276 offers superior resistance to oxidizing and reducing environments. Its ability to withstand aggressive chemicals and extreme temperatures makes it an ideal choice for applications that require maximum corrosion resistance and reliability.

ASMG’s Successful Projects Using Hastelloy C276

Case Study 1: Our customer in chemical processing industry, utilized C276 Hastelloy bar and tubes in the construction of a reactor that is exposed to highly corrosive chemicals. Over the course of several years, the reactor demonstrated remarkable resistance to corrosion, ensuring uninterrupted production and reducing maintenance costs. For our customers, the use of Hastelloy C276 proved to be a cost-effective and reliable choice for the long-term operation of this critical process equipment.

Case Study 2: At Petroleum Development Oman refinery, we provided them with Hastelloy C276 pipes. They utilized it in heat exchanger tubes exposed to high temperatures and corrosive gases. The exceptional high-temperature stability and corrosion resistance of Hastelloy C276 allowed for efficient heat transfer and extended equipment lifespan. This successful application of Hastelloy C276 demonstrates its reliability and effectiveness in challenging oil and gas environments.

Case Study 3: In an environmental waste treatment facility, Hastelloy C276 pipe was utilized in the construction of a flue gas scrubber. The scrubber was subjected to highly corrosive gases and acidic solutions. Hastelloy C276’s resistance to corrosion ensured the longevity and reliability of the scrubber, facilitating efficient removal of pollutants from flue gases. The utilization of Hastelloy C276 contributed to a sustainable and effective pollution control system.

Hastelloy C276 Applicable Specifications

Form ASTM ASME Other

Hastelloy C276 Plate & Sheet

B575 SB 575 N10276

Hastelloy C276 Bar

B574 SB 574 N10276

Hastelloy C276 Pipe & Tube

B622 SB 622 N10276

Hastelloy C276 Forgings

B564 SB 564 N10276

Common Trade Names

Alloy C-276 is commonly referred to as INCONEL® alloy C-276, while HASTELLOY® C-276 alloy is a registered trademark of Haynes International Inc. INCONEL® is a registered trademark of the Special Metals Corporation group of companies.

Key Properties

(in annealed condition)

Tensile strength: 550 – 800 MPa
Yield strength: 330 – 450 MPa
Elongation: 35 – 45%


Chemical Composition (%)

Element Composition
Nickel 57.0 – 59.0%
Molybdenum 15.5 – 17.5%
Chromium 14.5 – 16.5%
Iron 4.0 – 7.0%
Cobalt 2.5 max
Tungsten 3.5 – 4.5%
Manganese 1.0 max
Silicon 1.0 max
Carbon 0.01 max
Sulfur 0.03 max
Phosphorus 0.04 max

Request a Quote

Take the First Step in Your Project with Our Quick and Convenient Quote Request Form.