Introduction
Incoloy 20 is a nickel-based alloy that exhibits excellent mechanical and corrosion-resistant properties, making it suitable for use in high-temperature applications. The alloy was developed in the early 1950s to address the need for a material that could withstand highly corrosive environments such as those found in the chemical processing industry.
In terms of composition, Incoloy 20 is approximately 35% nickel, 20% chromium, 3% copper, with small amounts of molybdenum, niobium, and iron. The alloy’s high nickel content provides excellent resistance to chloride stress-corrosion cracking (SCC), while the copper component enhances its resistance to sulfuric acid corrosion.
Process Service
One of the most significant benefits of using Incoloy 20 is its resistance to a wide range of process services. The alloy is particularly well-suited for use in sulfuric acid service due to its high copper content, which provides protection from both reducing and oxidizing environments. Additionally, Incoloy 20 can withstand a wide range of other corrosive chemicals, including hydrochloric acid, phosphoric acid, and nitric acid.
Mechanical Properties
Incoloy 20 also boasts impressive mechanical properties, including high tensile strength, yield strength, and elongation. Its high hardness makes it resistant to deformation, while its ductility allows it to be formed into various shapes.
Standard Specifications
Several standards govern the manufacture and use of Incoloy 20, including ASTM B729, ASTM B464, ASTM B463, and ASTM B366. Adherence to these standards is crucial to ensuring optimal performance and safety when working with Incoloy 20.
Pipe
Incoloy 20 pipe is commonly used in chemical processing applications due to its high resistance to corrosive environments. Its smooth surface prevents buildup of deposits and ensures good flow characteristics, making it ideal for transporting liquids.
Plate
Incoloy 20 plate is used in a variety of high-temperature applications where corrosion resistance is critical. It is commonly used in heat exchangers, pressure vessels, and chemical processing equipment.
Round Bar
Incoloy 20 round bar is available in various sizes and shapes and can be used in various high-temperature applications, including pump shafts, valve stems, and fasteners.
Application
Incoloy 20 finds applications in various industries, including chemical processing, food processing, pharmaceuticals, and oil and gas. In the chemical processing industry, it is commonly used in heat exchangers, tanks, and distillation columns. The alloy’s resistance to sulfuric acid also makes it suitable for use in fertilizers and dyestuffs production.
Equivalent Grades
Incoloy 20 has several equivalent grades, including Alloy 20, Carpenter 20, and UNS N08020. Each equivalent grade offers similar mechanical and corrosion-resistant properties, but with slight
differences in composition or performance. It is essential to choose the appropriate equivalent grade for a specific application to ensure optimal performance.
Conclusion
In conclusion, Incoloy 20 is a versatile nickel-based alloy that exhibits excellent mechanical and corrosion-resistant properties, making it suitable for use in various high-temperature applications. Its unique combination of properties makes it an ideal material for use in harsh environments, particularly in the chemical processing industry. Proper adherence to industry standards and careful selection of equivalent grades are crucial to ensuring optimal performance and safety when working with Incoloy 20. As new technologies and applications emerge, Incoloy 20 is sure to continue to be a popular choice for high-temperature applications that require excellent corrosion resistance.
Post time: Jun-03-2023
