AMS 5874 Haynes Alloy – Composition, Properties, and Uses

AMS 5874 is a popular high-strength and corrosion-resistant superalloy widely used in various industries. It is known for its exceptional mechanical and physical properties and is considered an excellent material for applications requiring strength and corrosion resistance. But what makes AMS5874 stand out from the rest? Let’s dive into the details in this expert guide to AMS5874.

What is AMS 5874?

AMS 5874 ( also known as Haynes 556 Alloy) is a nickel-based superalloy that is particularly resistant to high-temperature corrosion and oxidation. The alloy mainly contains nickel, chromium, iron, titanium, molybdenum, and copper. The alloy has excellent properties such as high temperature and mechanical strength, good corrosion, and fatigue resistance.

What Form Is AMS 5874 Available at Piping Mart?

• Bars

AMS 5874 Composition

The exact composition of AMS 5874 varies by supplier, but it generally contains approximately 50% nickel, 20% chromium, 7% molybdenum, 4% titanium, and small amounts of other metals such as iron, cobalt, and copper. The composition ensures that the material has excellent corrosion resistance in aggressive environments such as seawater, acidic solutions, and aerospace applications.

AMS 5874 Physical Properties

AMS 5874 has outstanding physical properties, including high-temperature strength and low-temperature flexibility. It has a density of 8.19 g/cm3 and a melting point of 1390 °C (2534 °F). The alloy can be used in temperatures ranging between -253 °C (-423 °F) and 870 °C (1600 °F). The coefficient of thermal expansion (CTE) of AMS 5874 is 12.8 µm/m-°C (7.1 µin/in-°F), which is relatively low for nickel-based alloys.

AMS 5874 Mechanical Properties

AMS 5874 has excellent mechanical properties compared to other superalloys, making it an ideal material for challenging applications. Its ultimate tensile strength can reach up to 1800 MPa (261 ksi) while maintaining flexibility. The yield strength at room temperature is around 1200 MPa (174 ksi). Fatigue strength is also significant, with a rotating bending strength of approximately 925 MPa (134 ksi).

AMS 5874 Equivalent

• AMS 5831
• AMS 5874
• AMS 5877
• ASTM B366
• ASTM B435
• ASTM B572
• ASTM B619
• ASTM B622
• ASTM B626

AMS 5874 Uses

AMS 5874 has been widely used in various applications, especially in the aerospace industry. It is used to manufacture superchargers, turbines, jet engine parts, combustion chambers, afterburners, and other high-temperature applications. The material is also used in marine applications such as propeller shafts and valves. AMS 5874 is also used in chemical processing plants, nuclear waste storage, and other corrosive environments.

AMS 5874 Hardness

AMS 5874 has a high hardness that ranges between 40 – 47 HRC (Rockwell C scale). This is a relatively high hardness for nickel-based superalloys, which makes it ideal for wear-resistant applications.

AMS 5874 Heat Treatment

Heat treatment is crucial in making AMS 5874 because it affects the alloy’s microstructure and properties. The material is annealed at 1093 °C (2000 °F) for several hours before cooling in air or water. Later, the material may also undergo hot isostatic pressing (HIP) to enhance the material’s microstructure, which increases flexibility and corrosion resistance.

Conclusion

AMS 5874 is a highly versatile superalloy perfect for high-temperature and corrosive environments. It has excellent mechanical strength, elasticity, and high-temperature corrosion and oxidation resistance. Due to its remarkable combination of properties, this material has been used in various industries, including aerospace, maritime, and chemical processing plants. The composition, physical properties, mechanical properties, uses, hardness, and heat treatment techniques of AMS 5874 should be carefully considered when selecting a superalloy for specific applications.