Incoloy Grade 800H, also known as Incoloy 800H, is a high-temperature nickel-chromium alloy renowned for its exceptional resistance to oxidation, carburization, and high-temperature corrosion. Incoloy 800H plates, derived from this alloy, exhibit outstanding mechanical properties and thermal stability, making them ideal for use in various industrial applications. This comprehensive introduction provides an overview of the properties and composition of Incoloy Grade 800H plates.

1. Alloy Composition:

• Incoloy Grade 800H plate is primarily composed of nickel (Ni) and chromium (Cr), with significant additions of iron (Fe) and small amounts of other alloying elements such as aluminum (Al), titanium (Ti), and carbon (C). The precise composition of Incoloy Grade 800H plate may vary according to specific manufacturing requirements, but typical compositions include approximately 30-35% nickel, 19-23% chromium, and trace amounts of other elements. The balanced composition of Incoloy Grade 800H imparts exceptional mechanical properties and corrosion resistance, making it suitable for high-temperature applications.

2. High-Temperature Resistance:

• Incoloy Grade 800H plates are renowned for their outstanding resistance to high temperatures, making them suitable for applications in environments where temperatures can exceed 1000°C (1832°F). The alloy’s high nickel content provides excellent resistance to oxidation and carburization at elevated temperatures, ensuring reliable performance in heat treatment equipment, furnace components, and thermal processing units.

3. Oxidation and Corrosion Resistance:

• Incoloy Grade 800H plates offer exceptional resistance to oxidation and corrosion in various aggressive environments, including oxidizing and reducing atmospheres, sulfidation, and nitriding conditions. The alloy’s chromium content forms a protective oxide layer on the surface, providing resistance to oxidation and preventing degradation at high temperatures. Additionally, Incoloy Grade 800H exhibits good resistance to aqueous corrosion, making it suitable for applications in chemical processing and power generation industries.

4. Mechanical Properties:

• Incoloy Grade 800H plates exhibit excellent mechanical properties, including high tensile strength, yield strength, and elongation. The alloy maintains its mechanical integrity over a wide range of temperatures, ensuring reliable performance in demanding industrial applications. Additionally, Incoloy Grade 800H retains its ductility and toughness even at elevated temperatures, making it suitable for use in structural components subjected to thermal cycling and mechanical stress.

5. Thermal Stability:

• Incoloy Grade 800H plates demonstrate exceptional thermal stability, maintaining their dimensional stability and mechanical properties at high temperatures. The alloy is capable of withstanding prolonged exposure to elevated temperatures without significant degradation or loss of performance. This thermal stability makes Incoloy Grade 800H plates ideal for use in heat exchangers, furnace components, and thermal processing equipment operating at high temperatures.

Conclusion:

Incoloy Grade 800H plates, with their unique combination of high-temperature resistance, oxidation resistance, corrosion resistance, and excellent mechanical properties, are indispensable in various industrial applications. From heat treatment equipment and furnace components to chemical processing and power generation, Incoloy Grade 800H plates play a crucial role in ensuring the reliability and performance of equipment operating in demanding environments. By understanding the properties and composition of Incoloy Grade 800H plates, industries can make informed decisions regarding their use in critical applications, thereby enhancing productivity and safety.