If you’re involved in the aerospace industry, you must have encountered the term AMS 4349. But what is it? Why is it important? And what are its properties? Don’t worry; this blog post covers everything you need to know about AMS 4349, from its composition to its uses and everything in between.
What is AMS 4349?
AMS 4349 is a specification for high-strength aluminium alloy plates that have been heat-treated. This particular standard was developed by the Society of Automotive Engineers (SAE) to ensure that the plates used in aerospace applications meet the rigorous standards necessary for safe and reliable operation. The aluminium alloy used in AMS 4349 is known for its excellent strength-to-weight ratio and high fatigue resistance, making it an ideal material for constructing aircraft wings, fuselages, and other critical components. With AMS 4349, manufacturers can be confident that they are using a material specifically designed and tested to meet the demanding requirements of the aerospace industry.
AMS 4349 Composition
AMS 4349 is an aluminium bronze with excellent wear resistance and durability. It comprises copper, aluminium, Nickel, and Iron, with copper as the primary element. The specific composition of AMS 4349 is as follows: Copper – 83.5%, Aluminum – 9.5%, Nickel – 3.5%, and Iron – 3.0%. This combination creates a metal that can withstand high temperatures, making it ideal for use in the aerospace industry.
AMS 4349 Physical Properties
Regarding its physical properties, AMS 4349 has a density of 7.6 g/cm3, making it heavier and denser than other bronze alloys. It also has a melting point of 1,066 °C and a thermal conductivity of 44 W/mK. It exhibits excellent corrosion resistance, which is crucial given that it’s used in harsh environments.
AMS 4349 Mechanical Properties
Regarding mechanical properties, AMS 4349 has a high tensile strength of 1,000-1,200 MPa and a yield strength of 600-800 MPa. The elongation rate of this bronze alloy is around 16%, which means it can be subjected to some deformation before breaking. It also boasts excellent fatigue strength, ideal for critical aerospace applications.
AMS 4349 Uses
AMS 4349 is used primarily in the aerospace industry for its wear resistance, high strength, and high-temperature properties. It is commonly used in landing gear components, bushings, and bearings. Its exceptional ability to withstand high temperatures is essential in turbine engines, exhaust systems, and other high-temperature applications.
AMS 4349 Hardness
Regarding its hardness, AMS 4349 ranges from 150 – 190 HB, which is relatively soft compared to other alloys. However, it’s important to note that this alloy isn’t typically used for its hardness but rather for its other properties, such as its wear resistance.
AMS 4349 Heat Treated
AMS 4349 can be heat treated to achieve specific mechanical properties. Heat treatment involves heating the material to a specific temperature and then cooling it slowly, modifying the alloy’s microstructure to improve its mechanical properties. This treatment can also improve the alloy’s resistance to stress corrosion cracking, which can occur in harsh environments.
Conclusion:
In conclusion, AMS 4349 is a copper-based alloy with excellent wear resistance, high strength, and exceptional high-temperature properties. Its unique composition, physical and mechanical properties make it a valuable material for various aerospace applications. It can withstand harsh environments, exhibit outstanding corrosion resistance, and be heat-treated to achieve specific mechanical properties. Understanding the properties of AMS 4349 is crucial in the decision-making process when selecting materials for aerospace components.
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