Incoloy 903 is a high-strength nickel-based alloy that is primarily used in demanding applications requiring high mechanical strength, corrosion resistance and good thermal stability. It was first developed by the Anton Metals Corporation in the USA, hence it is also known as ANTON METAL.
The alloy is characterized by its excellent resistance to both oxidizing and reducing environments, making it suitable for use in harsh chemical environments. Its superior high-temperature strength and exceptional creep resistance also make it an ideal material for use in gas turbine engine components such as turbine discs, shafts, and blades. In this article, we will explore the various forms of Incoloy 903, its chemical composition, process service, standards, mechanical properties, applications, and equivalent grades.
Forms of Incoloy 903
Incoloy 903 is available in several different forms, including pipe, plate, strip, round bar, and wire. Each of these forms has its own specific advantages and applications. For example, Incoloy 903 plates are often used in the production of turbine discs due to their high strength and excellent heat resistance. Round bars, on the other hand, are commonly used for the manufacturing of shafts and blades in gas turbines and aircraft engines.
Chemical Composition of Incoloy 903
Incoloy 903 is composed of a combination of nickel, chromium, cobalt, iron, titanium, aluminum, and molybdenum. Its chemical composition is as follows:
- Nickel (Ni): 42%
- Chromium (Cr): 12%
- Cobalt (Co): 12%
- Iron (Fe): 12%
- Titanium (Ti): 3%
- Aluminum (Al): 2%
- Molybdenum (Mo): 1.5%
Process Service of Incoloy 903
Incoloy 903 can be processed using various methods, including forging, rolling, and heat treatment. The material can be forged at temperatures between 2010°F and 2150°F (1100°C and 1180°C). Rolling is performed between 1900°F and 2200°F (1040°C and 1200°C), while heat treatment is typically carried out at temperatures ranging from 1750°F to 2100°F (950°C to 1150°C).
Standards for Incoloy 903
Incoloy 903 is well-regulated by various industry standards, including ASTM B408 (Bar), ASTM B905 (Wire), and AMS 5829 (Plate and Strip). These standards ensure that the material is manufactured to specific quality requirements, and they provide guidelines for the processing, testing, and inspection of the alloy.
Mechanical Properties of Incoloy 903
Incoloy 903 has impressive mechanical properties, making it a highly desirable material for use in demanding applications. Its typical properties include:
- Ultimate Tensile Strength: 138 ksi (950 MPa)
- Yield Strength: 69 ksi (480 MPa)
- Elongation: 20%
- Reduction of Area: 35%
- Hardness: RC 38
Applications of Incoloy 903
Incoloy 903 is widely used in gas turbine engine components due to its excellent high-temperature strength, thermal stability, and resistance to corrosion. Its superior mechanical properties make it an ideal material for use in turbine blades, shafts, and discs. It is also used in the production of aircraft engine parts such as bearings, gears, and fasteners.
Equivalent Grades of Incoloy 903
Several other nickel-based alloys have similar chemical compositions and mechanical properties to Incoloy 903, making them potential alternatives for use in similar applications. Some of the most commonly used equivalent grades of Incoloy 903 include Haynes 230, Udimet 720, and Nimonic 105.
Conclusion
In summary, Incoloy 903 is a high-strength nickel-based alloy that offers exceptional resistance to both oxidizing and reducing environments, as well as excellent thermal stability and creep resistance. Its unique combination of mechanical properties and chemical composition make it an ideal material for use in gas turbine engine components, aircraft parts, and other demanding applications. With its impressive performance and widespread availability in various forms, Incoloy 903 is sure to remain a popular choice among designers and engineers for years to come.
Post time: Jun-03-2023
