Exploring Alloy 800 (UNS N08020): A Comprehensive Guide

In this guide, we’ll delve into the properties, applications, and characteristics of Alloy 800, also known as UNS N08020. This alloy is a nickel-iron-chromium material renowned for its exceptional resistance to oxidation, carburization, and sulfidation at high temperatures. Let’s explore further:

Understanding Alloy 800 (UNS N08020)

Alloy 800 belongs to the family of austenitic stainless steels and is characterized by its high strength and corrosion resistance. It is widely used in industries requiring materials that can withstand extreme temperatures and harsh environments.

Properties of Alloy 800

  • High Temperature Resistance: Alloy 800 exhibits outstanding resistance to high temperatures, making it suitable for applications in heat-intensive environments.
  • Corrosion Resistance: This alloy offers excellent resistance to corrosion in various atmospheres, including oxidizing, reducing, and nitriding environments.
  • Mechanical Properties: Alloy 800 possesses good mechanical properties, including high tensile strength and creep-rupture properties, even at elevated temperatures.
  • Weldability: Alloy 800 can be easily welded using standard methods, allowing for the fabrication of complex structures and components.

Applications of Alloy 800

Alloy 800 finds widespread use in various industries due to its unique combination of properties:

  • Heat Exchangers: Its high temperature resistance and corrosion resistance make Alloy 800 ideal for heat exchangers and furnace components.
  • Chemical Processing: Alloy 800 is commonly used in chemical processing equipment, such as reactors, vessels, and piping systems, where resistance to corrosive environments is crucial.
  • Power Generation: In power generation facilities, Alloy 800 is employed in boiler components, steam turbines, and exhaust systems due to its ability to withstand high temperatures and oxidation.
  • Petrochemical Industry: This alloy is widely utilized in the petrochemical industry for applications such as piping, tubing, and heat exchangers, where resistance to sulfidation and carburization is vital.
  • Industrial Furnaces: Alloy 800 is favored for use in industrial furnaces and heating elements due to its high temperature resistance and long-term stability.


Alloy 800 (UNS N08020) is a versatile material with exceptional properties that make it indispensable in various industries. Whether you’re designing heat exchangers, fabricating chemical processing equipment, or constructing industrial furnaces, Alloy 800 provides the durability and reliability needed for optimal performance.

Explore the potential of Alloy 800 in your next project and discover firsthand the benefits of this remarkable material.

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