Nickel Alloy C276

Nickel Alloy C276

Nickel Alloy C276, also known as HASTELLOY C-276, is a solid solution strengthened nickel-molybdenum-chromium alloy with a small amount of tungsten. This composition allows Nickel Alloy C276 to provide exceptional resistance to a wide range of corrosive environments. It is particularly well-known for its outstanding resistance to stress corrosion cracking in chloride-bearing solutions, making it ideal for applications in the chemical and petrochemical industries, where exposure to harsh conditions is common. Nickel Alloy C276 is highly versatile and can be easily fabricated, welded, and formed. This makes it a preferred choice in applications that demand high-performance materials. Whether used in heat exchangers, reactors, or piping systems, Nickel Alloy C276 provides long-lasting durability and reliability. The addition of tungsten to Alloy C276 enhances its strength and resistance to both oxidation and corrosion. This unique combination of elements allows Nickel Alloy C276 to withstand extreme temperatures and aggressive chemical environments, such as those found in the paper and pulp industry, as well as in pollution control equipment. In summary, Nickel Alloy C276 is a vital material for industries that require high-strength, corrosion-resistant alloys. With its combination of strength, ductility, and resistance to stress corrosion cracking, Nickel Alloy C276 continues to play a crucial role in modern manufacturing, ensuring the longevity and reliability of equipment used in critical industrial processes.

Chemical Composition

Nickel Alloy C276, also known as HASTELLOY C-276, is a high-performance alloy with outstanding resistance to a wide range of corrosive media. One of its key properties is its exceptional resistance to phosphoric acid-containing solutions. This makes it particularly useful in industries where exposure to such acids is common. Additionally, Alloy C276 offers excellent corrosion resistance to seawater, even under crevice conditions, which often lead to attack in other commonly used materials such as 316 stainless steel, MONEL alloy 400, and INCONEL alloy 625.

The unique composition of Nickel Alloy C276 includes a high content of molybdenum, which contributes to its exceptional resistance to sulfuric acid and hydrochloric acid, as well as a variety of other corrosive environments. This includes resistance to both reducing and oxidizing acids, highly oxidizing environments, acid chlorides, formic and acetic acids, acetic anhydride, wet chlorine gas, hypochlorites, and chlorine solutions.

HASTELLOY C-276 is widely used in flue gas desulfurization (FGD) systems to control air pollution, making it a critical material in power plants. The alloy is also extensively used in scrubbers, ducting, stack liners, and stack-gas re-heaters, ensuring the longevity of equipment exposed to aggressive chemical environments. In comparison, Alloy C276 stands out for its ability to withstand extreme chemical conditions, outperforming other alloys due to its unique composition, which includes molybdenum and other strengthening elements.

This versatility and resistance to corrosion make Nickel Alloy C276 a preferred material in chemical processing, power generation, and a variety of industries requiring high-performance alloys.

Hastelloy C276 Specifications

GRADE UNS WERKSTOFF NR. EN OR JIS ASTM
Hastelloy C-276 N10276 2.4819 NiMo16Cr15W ЭП760 NW 0276 B 622, B 619, B 626, B 575, B 574, B 366

HASTELLOY C-276, also known as Nickel Alloy C276, is a nickel-molybdenum-chromium super-alloy with an addition of tungsten, engineered to provide superior corrosion resistance in a wide range of severe environments. The unique composition of Alloy C276 allows it to excel in both oxidizing and reducing environments, making it ideal for industries that deal with highly corrosive materials.

Nickel Alloy C276 is particularly resistant to a variety of aggressive chemicals, including sulfuric acid, hydrochloric acid, phosphoric acid, and many others. Its outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking makes it a go-to material for critical applications in chemical processing, power plants, and environmental control systems. The high molybdenum content in Alloy C276 helps it withstand the harsh conditions encountered in the chemical and petrochemical industries, particularly when dealing with chlorides, acids, and other corrosive agents.

Moreover, Nickel Alloy C276's ability to withstand high temperatures adds to its versatility. It is commonly used in heat exchangers, reactors, and piping systems, where both corrosion resistance and thermal stability are essential. The addition of tungsten to Alloy C276 further enhances its strength and resistance to oxidation, allowing it to perform reliably in high-stress environments.

Nickel Alloy C276 is a material of choice for applications requiring exceptional resistance to corrosion and high performance in extreme conditions. Its unparalleled durability in both reducing and oxidizing environments makes it indispensable in industries such as chemical processing, aerospace, and environmental control.

[#corrosion-resistance]Hastelloy C-276 Corrosion Resistance[#corrosion-resistance]

Alloy C-276 Hastelloy is a highly corrosion-resistant material, offering outstanding protection against stress corrosion cracking, general corrosion, crevice corrosion, and pitting. This exceptional resistance makes Nickel Alloy C276 ideal for use in highly aggressive environments, such as those found in the chemical, petrochemical, and power generation industries. Whether exposed to highly acidic, oxidizing, or reducing conditions, Alloy C276 maintains its integrity and performance, ensuring long-lasting durability and reliability.

One of the key advantages of Nickel Alloy C276 is its low carbon content, which plays a crucial role in minimizing carbide precipitation during welding. This feature helps maintain its resistance against intergranular attack in the heat-affected zones of welded joints, ensuring that the integrity of the welded areas is preserved. This makes Alloy C276 an ideal choice for high-temperature applications, where welding and joining are often necessary.

The versatility of Nickel Alloy C276 extends across a variety of applications, from piping systems to heat exchangers, where its ability to withstand corrosive substances is crucial. Its resistance to both localized and uniform corrosion ensures that equipment and structures made from Alloy C276 maintain their strength and reliability over time, even in the harshest environments. This makes Alloy C276 a preferred material for critical industries requiring high-performance alloys capable of withstanding extreme conditions.

Physical properties

Grade Density (g/cm3) Melting Point °C Co-eff of Thermal Expansion (μm/m/°C) Thermal Conductivity (W/m.K) Specific Heat ( J/Kg.K)
Hastelloy C-276 8.89 1371 24-93°C 7.2 0-100°C
11.2 727

HASTELLOY C-276, also known as UNS N10276, is highly regarded for its exceptional weldability, a property that allows it to be easily fabricated into various shapes while maintaining its high performance in demanding environments. This weldable nature ensures that the alloy can be formed into a wide range of components, such as pipes, fittings, and plates, making it a versatile choice for many industrial applications. Due to its excellent welding properties, HASTELLOY C-276 is a preferred material for industries that require precision welding and robust performance under harsh conditions.

The cost of HASTELLOY C-276 can be higher than that of other alloys, primarily due to its specialized properties, including its exceptional corrosion resistance, high strength, and resistance to pitting, crevice corrosion, and stress corrosion cracking. These qualities make Nickel Alloy C276 an essential material in industries such as pollution control, chemical processing, waste treatment, marine engineering, and pulp and paper production, where exposure to corrosive agents is common.

HASTELLOY C-276's outstanding resistance to various aggressive environments, combined with its excellent weldability, makes it indispensable in applications requiring high-performance materials. Suppliers of HASTELLOY C-276 offer a wide range of products, including pipe fittings, forgings, flanges, and plates, ensuring that clients can find the right components for their specific needs. Alloy C276's ability to withstand extreme conditions while maintaining its integrity makes it a vital material in industries that demand reliability and durability.

[#fabrication-and-heat-treatment]Hastelloy C-276 Fabrication and Heat Treatment[#fabrication-and-heat-treatment]

HASTELLOY C-276, or Alloy C276, is highly versatile when it comes to fabrication, as it can be hot-forged, hot-rolled, hot-upset, hot-extruded, and hot-formed. These various forming methods ensure that the alloy can be shaped into a wide range of components for use in demanding environments. While the alloy exhibits the ability to work-harden, it remains workable under proper conditions, allowing it to be successfully spun, deep-drawn, press-formed, or punched. However, due to its sensitivity to strain and strain rates, the forming process needs careful attention. The hot working temperature range for HASTELLOY C-276 is relatively narrow, with optimal hot-forming temperatures between 1600 and 2250°F (870 and 1230°C), and heavy forming should be done above 2000°F (1090°C).

Welding HASTELLOY C-276 requires careful consideration as well. While common welding methods can be employed, processes such as oxyacetylene and submerged arc welding are not recommended for components intended for corrosion service, as they can compromise the material's integrity. Nickel Alloy C276 is also susceptible to work hardening, necessitating multiple stages of cold work with intermediate anneals to ensure it maintains its excellent performance.

When it comes to heat treatment, Alloy C276 is normally annealed at temperatures between 2100-2150°F (1150-1175°C) and rapidly cooled, often by water quenching. This process helps to relieve stresses and maintain the alloy's corrosion resistance and mechanical properties, making it an ideal material for critical applications in industries like chemical processing, marine engineering, and pollution control.

[#weldability]Hastelloy C-276 Weldability[#weldability]

HASTELLOY or UNS N10276 is known for their good weldability, and capable of being welded by the commonly used welding methods. The welded component should be given the utmost importance when determining a suitable weld process or procedure

If proper welding techniques and procedures are followed, high-quality welds can be produced with conventional arc welding processes. For corrosive applications this alloy is capable of being used in the “as-welded” condition without the need for more heat treatment.

INCO WELD filler metal and welding electrode 686CPT® can be used to “overmatch” INCONEL alloy C-276 where enhanced corrosion resistance is required.

[#applications]Hastelloy C-276 Applications[#applications]

Hastelloy C-276 with its high corrosion resistance and good welding properties is mainly used in many industries such as Pollution control treatment, Chemical processing plant, Waste treatment plant, Marine engineering and Pulp and paper production etc.

Due to high levels of nickel, chromium, and molybdenum in alloy C-276 it makes the alloy resistant to sour environments even at high temperatures in deep wells. Hastelloy C276 density is also one of the major factors why hastelloy C276 tube fittings, hastelloy C276 pipe, hastelloy C276 round bar and hastelloy C276 tubing is popular. Hastelloy c 276 price varies for different items.

Various industries where the alloy is used are:

1: Off-Shore Oil Drilling Companies

2: Power Generation

3: Petrochemicals

4: Gas Processing

5: Specialty Chemicals

6: Pharmaceuticals

7: Pharmaceutical Equipment

8: Chemical Equipment

9: Sea Water Equipment

10: Heat Exchangers

11: Condensers

12: Pulp and Paper Industry

NOTE: Hastelloy C-276 is a registered trademark of Haynes International Inc.

Chemical processes

Furnaces Vacuum

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