Haynes 25 is a superalloy that is well known for its excellent high-temperature strength, good oxidation resistance, and excellent fabricability. It is also known as ANTON METAL and is used in a variety of applications across industries. In this article, we will take an in-depth look at Haynes 25 including its chemical composition, mechanical properties, standards, specifications, and applications.
Chemical Composition
Haynes 25 is a nickel-chromium-tungsten-molybdenum alloy that is strengthened by the addition of titanium and aluminum. The chemical composition of Haynes 25 is as follows:
- Nickel: 50.0%
- Chromium: 20.0%
- Tungsten: 15.0%
- Molybdenum: 10.0%
- Titanium: 1.5%
- Aluminum: 0.6%
- Iron: 2.5%
- Cobalt: 0.5%
The high nickel content in Haynes 25 gives it excellent corrosion resistance while the tungsten and molybdenum provide high-temperature strength. The addition of titanium and aluminum further enhances the strength of the alloy while improving its fabricability.
Mechanical Properties
Haynes 25 is a high-strength alloy that exhibits excellent mechanical properties at both room temperature and high temperatures. Some of the key mechanical properties of Haynes 25 are as follows:
- Ultimate Tensile Strength: 1375 MPa (199,000 psi)
- Yield Strength: 690 MPa (100,000 psi)
- Elongation: 20%
- Hardness: HRc 30-35
- Density: 8.22 g/cm3
At high temperatures, Haynes 25 retains its excellent mechanical properties with high-temperature tensile strength of up to 1035 MPa (150,000 psi) at 704°C (1300°F).
Standards and Specifications
Haynes 25 is available in a variety of forms including sheet, plate, bar, wire, and forgings. It is used in various applications across industries such as aerospace, chemical processing, oil and gas, and power generation.
Some of the key standards and specifications that govern the use of Haynes 25 are:
- AMS 5537: This specification covers a heat-resistant nickel alloy in the form of sheet, strip, and plate.
- AMS 5759: This specification covers a corrosion-resistant nickel alloy in the form of bars, forgings, and forging stock.
- AMS 5796: This specification covers a heat-resistant nickel alloy in the form of bars, forgings, and forging stock.
- ASTM B435: This specification covers a heat-resistant nickel alloy in the form of rolled sheet.
Applications
Haynes 25 is used in a variety of high-temperature applications across industries due to its excellent mechanical properties and corrosion resistance. Some of the key applications of Haynes 25 are:
- Aerospace: Haynes 25 is used in turbine engine components such as turbine blades, combustion chambers, and afterburner parts due to its high-temperature strength and oxidation resistance.
- Chemical Processing: Haynes 25 is used in chemical processing equipment such as reactors, distillation columns, and heat exchangers due to its excellent corrosion resistance.
- Oil and Gas: Haynes 25 is used in oil and gas applications such as gas turbines, heat exchangers, and valves due to its high-temperature strength and corrosion resistance.
- Power Generation: Haynes 25 is used in power generation applications such as gas turbine engines, combustion chambers, and exhaust systems due to its high-temperature strength and oxidation resistance.
Conclusion
Haynes 25 is a superalloy that is well known for its excellent high-temperature strength, good oxidation resistance, and excellent fabricability. It is used in a variety of applications across industries such as aerospace, chemical processing, oil and gas, and power generation. The chemical composition of Haynes 25 includes nickel, chromium, tungsten, molybdenum, titanium, aluminum, iron, and cobalt. Its key mechanical properties include ultimate tensile strength, yield strength, elongation, hardness, and density. Standards and specifications that govern the use of Haynes 25 include AMS 5537, AMS 5759, AMS 5796, and ASTM B435.
Post time: May-27-2023
