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Introduction to Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe
The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is a highly corrosion-resistant and versatile alloy steel pipe that is widely used in various industries such as chemical processing, oil and gas, and power generation. It is made from the Hastelloy C276 alloy, which is a nickel-molybdenum-chromium alloy known for its exceptional resistance to a wide range of corrosive environments. This article will provide an overview of the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe, including its specifications, properties, and applications.
Specifications of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe
- Standard: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe conforms to various international standards, including ASTM B619 and ASTM B622. These standards ensure the quality and performance of the pipe in different applications.
- Size Range: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is available in a wide range of sizes, ranging from 1/8″ to 48″ in diameter. This variety allows for flexibility in selecting the most suitable pipe size for specific project requirements.
- Wall Thickness: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe offers a range of wall thicknesses, from Schedule 5S to Schedule XXS. The selection of the appropriate wall thickness depends on factors such as operating pressure, temperature, and system requirements.
- Length: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is typically supplied in standard lengths of 6 meters or 12 meters. However, it can be customized to meet specific customer requirements, ensuring seamless integration into various piping systems.
- End Connections: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe can be supplied with various end connections, including plain ends, beveled ends, and threaded ends. These options provide flexibility in connecting the pipe to different components and fittings.
Alloy C276 UNS N10276 Chemical Composition
| % | Ni | Cr | Fe | Mn | C | W | Si | S | P | Co | Mo | V |
| Min | Remainder | 14.5 | 4.0 | 3.0 | 15.0 | |||||||
| Max | 16.5 | 7.0 | 1.0 | 0.01 | 4.5 | 0.08 | 0.03 | 0.04 | 2.5 | 17.0 | 0.35 |
Hastelloy C276 Physical Constants:
| Density | 8.87 Mg/m³ |
| Melting Range | 1325-1370 ℃ |
UNS N10276 Mechanical Properties:
| Grade | Tensile Strength, min, (MPa) | Yield Strength, min, (MPa) | Elongation in 2 in. or 50mm, min, % | Hardness, max HRC |
| UNS N10276 | 690 | 283 | 40 | – |
Chemical Composition and Mechanical Properties of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe
The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is made from the Hastelloy C276 alloy, which has a specific chemical composition and mechanical properties. The following table provides an overview of the chemical composition of the alloy:
| Element | Percentage (%) |
|---|---|
| Nickel | 50.99 – 63.00 |
| Chromium | 14.50 – 16.50 |
| Molybdenum | 15.00 – 17.00 |
| Iron | 4.00 – 7.00 |
| Tungsten | 3.00 – 4.50 |
| Cobalt | 2.50 max |
| Manganese | 1.00 max |
| Carbon | 0.010 max |
| Silicon | 0.080 max |
| Phosphorus | 0.040 max |
| Sulfur | 0.030 max |
These chemical compositions contribute to the exceptional corrosion resistance and mechanical properties of the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe.
The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe exhibits excellent mechanical properties, including high tensile strength, yield strength, and elongation. The following table provides the minimum mechanical properties of the pipe:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 100 ksi (690 MPa) |
| Yield Strength (0.2% offset) | ≥ 41 ksi (283 MPa) |
| Elongation | ≥ 40% |
These mechanical properties ensure the durability, reliability, and long-term performance of the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe in various demanding applications.
Corrosion Resistance of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe
One of the key advantages of the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is its exceptional resistance to a wide range of corrosive environments. The alloy exhibits excellent resistance to:
- Acidic Environments: The Hastelloy C276 alloy is highly resistant to corrosion in acidic environments, including sulfuric acid, hydrochloric acid, phosphoric acid, and acetic acid. It can withstand both oxidizing and reducing conditions, making it suitable for various chemical processing applications.
- Chloride Environments: The Hastelloy C276 alloyprovides excellent resistance to chloride-induced corrosion, including pitting and crevice corrosion. This makes it suitable for applications in seawater, brackish water, and chloride-containing environments.
- Oxidizing Environments: The Hastelloy C276 alloy exhibits exceptional resistance to oxidation, even at high temperatures. It can withstand the corrosive effects of oxygen and other oxidizing agents, making it suitable for applications in combustion systems and high-temperature environments.
- Alkaline Environments: The Hastelloy C276 alloy is resistant to alkaline solutions, including sodium hydroxide and potassium hydroxide. It can withstand the corrosive effects of alkaline environments, making it suitable for applications in chemical processing and alkaline-based industries.
The corrosion resistance of the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is attributed to the presence of nickel, molybdenum, and chromium in its composition. These elements form a protective passive oxide layer on the surface of the pipe, preventing corrosion and ensuring long-term performance.
Applications of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe
The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe finds applications in various industries due to its excellent corrosion resistance and mechanical properties. Some of the key applications include:
- Chemical Processing: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is widely used in chemical processing plants, where it comes into contact with corrosive chemicals and acids. It is used for transporting corrosive fluids, such as sulfuric acid, hydrochloric acid, and phosphoric acid.
- Oil and Gas: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is used in the oil and gas industry for applications such as offshore drilling, production, and refining. It is resistant to corrosion in harsh environments, including sour gas, seawater, and acidic crude oil.
- Power Generation: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is used in power generation plants, particularly in flue gas desulfurization systems. It is resistant to corrosion from sulfur compounds and acidic gases, ensuring the efficiency and longevity of the power generation equipment.
- Pulp and Paper: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is used in the pulp and paper industry for applications such as bleach plants and chemical recovery systems. It can withstand the corrosive effects of chlorine dioxide, chlorine gas, and other chemicals used in the paper-making process.
- Desalination: The Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is used in desalination plants, where it comes into contact with seawater and brackish water. It provides excellent resistance to chloride-induced corrosion, ensuring the durability and efficiency of the desalination equipment.
These are just a few examples of the wide range of applications where the Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe is used. Its corrosion resistance, mechanical properties, and versatility make it a preferred choice in various industries.
Frequently Asked Questions (FAQ)
Q1: What is the difference between Hastelloy C276 and Inconel?
A1: Hastelloy C276 and Inconel are both nickel-based alloys, but they have different compositions and properties. Hastelloy C276 is a nickel-molybdenum-chromium alloy, while Inconel is a nickel-chromium alloy. Hastelloy C276 offers superior corrosion resistance in a wide range of environments, making it suitable for highly corrosive applications. Inconel, on the other hand, offers excellent high-temperature strength and oxidation resistance.
Q2: Can Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe be welded?
A2: Yes, Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe can be welded using various welding techniques, such as TIG (Tungsten Inert Gas) welding and MIG (Metal Inert Gas) welding. However, it is important to follow the recommended welding procedures and use suitable filler materials to ensure the integrity and corrosion resistance of the weld joint.
Q3: What is the maximum operating temperature of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe?
A3: The maximum operating temperature of Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe depends on various factors, such as the concentration of corrosive media and the duration of exposure. In general, it can withstand temperatures up to 1,900°F (1,038°C) in oxidizing environments and up to 2,200°F (1,204°C) in reducing environments.
Q4: Can Hastelloy C276 UNS N10276 Inconel Alloy Steel Pipe be used in seawater applications?
A4: Yes,
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