Haynes 282 is a high-temperature alloy that has gained popularity due to its remarkable resistance to heat and corrosion. It is a nickel-based alloy that was developed by Haynes International, Inc., a leading manufacturer of high-performance alloys. This alloy is known for its exceptional strength at high temperatures, making it ideal for use in applications where extreme heat or stress is present.
ANTON METAL
One of the key components of Haynes 282 is ANTON metal. ANTON is an acronym for “Aluminide Not Totally Optimized Now,” and it is a gamma prime (γ’) Ni3(Al,Ti) intermetallic compound. This compound is responsible for the excellent high-temperature properties of Haynes 282, as it provides the alloy with superior mechanical strength, thermal stability, and oxidation resistance.
The chemical composition of Haynes 282 includes nickel, chromium, iron, molybdenum, cobalt, aluminum, titanium, and tungsten. The exact percentages of these elements vary depending on the specific grade of the alloy. However, generally speaking, Haynes 282 contains approximately 57% nickel, 20% chromium, 9% iron, 8% molybdenum, 2.5% cobalt, 1.5% aluminum, 1.4% titanium, and 1% tungsten.
MECHANICAL PROPERTIES
Haynes 282 exhibits excellent mechanical properties at high temperatures. Its tensile strength is typically in the range of 900-1100 MPa at temperatures of up to 760°C, and its yield strength is usually around 550-650 MPa at the same temperature. The alloy’s elongation is typically between 25% and 35% at room temperature, and it remains above 10% even at temperatures as high as 800°C.
Haynes 282 also has good fatigue resistance, with a fatigue strength that is typically around 345 MPa at room temperature. The alloy’s creep resistance is also excellent, with a time to 1% strain of approximately 2,500 hours at 760°C and 207 MPa.
STANDARDS AND SPECIFICATIONS
Haynes 282 is manufactured according to various industry standards and specifications, including AMS 5936, AMS 5894, and ASTM B637. These standards define the chemical composition, mechanical properties, and other quality requirements for Haynes 282.
APPLICATIONS
Haynes 282′s exceptional high-temperature properties make it ideal for use in a wide range of demanding applications. It is commonly used in the aerospace industry, particularly in gas turbine engines, where its combination of strength, thermal stability, and corrosion resistance are highly valued. Other applications include:
- Power generation – Haynes 282 is used in high-temperature components such as exhaust systems and combustion chambers in gas turbines used for power generation.
- Oil and gas – This alloy is used in oil and gas operations, where it is used in downhole tools, drill bits, and other high-temperature components.
- Chemical processing – Haynes 282 is used in chemical processing plants, where it is used in equipment such as reactors, heat exchangers, and valves.
- Nuclear – Haynes 282 is used in nuclear power plants, where it is used in equipment such as fuel rods and control rods.
MANUFACTURING TECHNIQUES
Haynes 282 is typically manufactured using a variety of techniques, including vacuum induction melting (VIM), electroslag remelting (ESR), and hot isostatic pressing (HIP). These processes help to ensure that the alloy meets the exacting quality requirements demanded by its many applications.
CONCLUSION
Haynes 282 is a remarkable high-temperature alloy that has found widespread use in a variety of demanding applications. Its combination of strength, thermal stability, and corrosion resistance make it ideal for use in gas turbine engines, power generation, oil and gas, chemical processing, and nuclear applications. The alloy is manufactured according to various industry standards and specifications, and it is typically produced using a combination of vacuum induction melting, electroslag remelting, and hot isostatic pressing.
Post time: May-27-2023
