Alloy A286

A286, also known as AISI 660, is a high-performance iron-nickel-chromium-based superalloy. It is widely recognized for maintaining high strength and excellent oxidation resistance even at elevated temperatures. Because of its heat resistance and durability, it is extensively used in aerospace, energy, and defense industries.


Composition and Key Elements

A286 consists primarily of iron (Fe), alloyed with nickel (Ni), chromium (Cr), molybdenum (Mo), titanium (Ti), and aluminum (Al). These elements enhance its strength and resistance to oxidation, especially under extreme heat. The alloy benefits significantly from solubilization and aging heat treatments, which improve its tensile and creep properties.


Superior Performance at Elevated Temperatures

With tensile strength reaching approximately 130 ksi (896 MPa) or more, A286 maintains excellent mechanical performance above 700°C. Even in environments with frequent temperature fluctuations, it shows stable thermal fatigue resistance. This makes A286 ideal for high-reliability parts that are exposed to high thermal stress.


Major Industrial Applications

A286 is commonly used in components operating under high temperature and high pressure, such as:

- Jet engine turbine disks and combustors

- High-temperature bolts and fasteners

- Gas turbine and rotor components

- Nuclear power plant internals and piping

Thanks to its ability to withstand thermal deformation, it is suitable for precision parts in aerospace, petrochemical, and nuclear industries.


Cost-Performance Balance Compared to Nickel Alloys

Although A286 contains less nickel than fully nickel-based superalloys like Inconel 718 or Waspaloy, it offers a cost-effective alternative. It provides a balanced mix of strength, workability, and price. However, its performance declines slightly above 800°C, so selecting the right alloy for the intended service temperature is critical.


High Scrap Value and Recycling Potential

A286 contains valuable alloying elements such as nickel, chromium, molybdenum, and titanium, making its scrap highly recoverable. Turbine parts, nozzles, and high-strength bolts made from A286 are prime candidates for recycling.

The recovery process typically involves:

- Crushing and sorting

- Melting and refining

- Reintroducing purified elements into new superalloys

This process is essential in aerospace and defense sectors, where resource circulation and cost efficiency are increasingly prioritized.


Strategic Importance in Resource Circulation

In today's global supply chain environment, recycling A286 plays a strategic role in resource security. The high recovery rate of critical elements like titanium and molybdenum adds further value. As carbon neutrality becomes a global goal, demand for rematerialized alloys will continue to grow.

Domestic industries can benefit by investing in A286 scrap recycling technologies. It not only reduces dependence on imports but also ensures supply chain stability for high-performance materials.



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