Haynes 556 is a nickel-chromium-cobalt-molybdenum-tungsten alloy which offers excellent high-temperature strength and corrosion resistance. Developed by Haynes International, Inc., this alloy has been widely used in various industrial applications where high-temperature performance is required.
ANTON METAL
Haynes 556 belongs to the family of Anton Metal, which is a group of nickel-based alloys known for their exceptional high-temperature properties. The Anton Metal family includes several alloys such as Haynes 188, Haynes 214, Haynes 230, and Haynes 242, among others. These alloys are typically used in applications involving extreme temperatures, from cryogenic (-269°C) to over 1200°C.
CHEMICAL COMPOSITION
The chemical composition of Haynes 556 is as follows:
- Nickel (Ni): 42%
- Chromium (Cr): 22%
- Cobalt (Co): 14%
- Molybdenum (Mo): 9%
- Tungsten (W): 3%
- Iron (Fe): 2.5%
- Aluminum (Al): 1.5%
- Titanium (Ti): 1%
- Carbon (C): 0.05%
- Boron (B): 0.015%
MECHANICAL PROPERTIES
Haynes 556 exhibits excellent mechanical properties at high temperatures. Its typical mechanical properties at room temperature and elevated temperatures are shown below:
- Tensile strength at room temperature: 115 ksi (793 MPa)
- Tensile strength at 800°C: 45 ksi (310 MPa)
- Yield strength at room temperature: 55 ksi (379 MPa)
- Yield strength at 800°C: 20 ksi (138 MPa)
- Elongation at room temperature: 40%
- Elongation at 800°C: 50%
- Hardness at room temperature: 32 HRC
- Hardness at 800°C: 20 HRC
STANDARDS AND SPECIFICATIONS
Haynes 556 is available in various forms such as sheet, plate, bar, wire, and forging. It is typically manufactured to ASTM specifications such as ASTM B435 (sheet and plate), ASTM B574 (bar and wire), and ASTM B564 (forging). Other standards that this alloy may comply with include AMS 5540, AMS 5536, and AMS 5759.
APPLICATIONS
Haynes 556 is commonly used in applications where high-temperature strength and corrosion resistance are critical. Some of the typical applications of this alloy include:
- Gas turbine components: Haynes 556 is widely used in gas turbine components such as combustors, transition ducts, and exhaust systems due to its excellent high-temperature strength and corrosion resistance.
- Aerospace industry: This alloy is used in various aerospace applications such as afterburner liners, turbine blades, and nozzle guide vanes due to its exceptional thermal stability and wear resistance.
- Chemical processing industry: Haynes 556 is used in chemical processing equipment such as reactors, valves, and heat exchangers due to its outstanding corrosion resistance to a wide range of corrosive media.
- Nuclear industry: This alloy is also used in nuclear power plant applications such as reactor vessels and steam generators due to its excellent resistance to stress corrosion cracking and intergranular attack.
CONCLUSION
In summary, Haynes 556 is an excellent nickel-based alloy known for its exceptional high-temperature strength and corrosion resistance. It belongs to the family of Anton Metal alloys and has a unique chemical composition that makes it suitable for use in a wide range of industrial applications. Whether you are looking for a material for gas turbine components, aerospace applications, or chemical processing equipment, Haynes 556 is a reliable and durable solution that can withstand the most demanding operating conditions.
Post time: May-27-2023
