Incoloy 800H/NS112A/UNS N08810 High-Temperature Alloy Bolt High-Temperature Global Standard

Incoloy 800H/NS112A/UNS N08810 High-Temperature Alloy Bolt For High-Temperature Applications With Global Standard

The Incoloy 800H (NS112A / UNS N08810 / 1.4876) bolt is a high-performance fastener designed for extreme environments, particularly in high-temperature and corrosive applications. Made from a nickel-iron-chromium alloy, it offers excellent resistance to oxidation, carburization, and sulfidation at elevated temperatures, typically up to 1100°C (2012°F). The alloy’s enhanced creep and rupture strength is achieved through controlled carbon and grain size optimization.

Commonly used in heat exchangers, power plants, furnace components, and petrochemical processing, these bolts maintain superior mechanical properties under thermal cycling and stress. They also resist chloride-induced stress corrosion cracking, making them ideal for offshore and chemical industries.

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Incoloy 800H (NS112A / UNS N08810 / 1.4876) Bolt – Key Features

• High-Temperature Resistance – Excellent strength and stability at elevated temperatures up to 1100°C (2012°F), making it ideal for heat-exposed environments.
• Corrosion & Oxidation Resistance – Superior resistance to oxidation, carburization, and sulfidation in high-temperature and corrosive environments.
• Creep & Rupture Strength – Enhanced creep and stress rupture strength due to higher carbon content compared to Incoloy 800.
• Nickel-Iron-Chromium Alloy – Composed of approximately 32-35% Ni, 19-23% Cr, and balance Fe, providing strength and durability.
• Excellent Structural Stability – Maintains microstructural stability over prolonged exposure to high temperatures, reducing material degradation.
• Good Mechanical Properties – Offers high tensile strength and ductility, ensuring durability under mechanical stress.
• Resistance to Acidic & Sulfur Environments – Performs well in environments with sulfur-containing gases and acidic conditions.

Incoloy 800H (also known as NS112A, UNS N08810, and 1.4876) is a high-temperature, corrosion-resistant nickel-iron-chromium alloy known for its excellent strength and oxidation resistance. It is widely used in various high-temperature and corrosive environments.

Applications of Incoloy 800H Bolts:

• Petrochemical & Chemical Processing

Used in heat exchangers, reactors, and piping systems exposed to high temperatures and corrosive media.

Handles exposure to sulfur-containing environments in refining operations.

• Power Generation

Steam generator tubing in power plants.

High-temperature fasteners in gas turbines and boiler components.

• Heat Treatment Equipment

Fixtures, trays, and bolts used in heat treatment furnaces.

Withstands cyclic heating and cooling without losing mechanical integrity.

• Aerospace & Aviation

High-temperature fastening applications in jet engines and exhaust systems.

Used in aircraft turbine components due to its oxidation resistance.

• Nuclear Industry

Structural components and fasteners in nuclear reactors.

Used in heat exchangers for cooling systems in nuclear plants.

• Marine & Offshore Engineering

Fasteners for offshore platforms and ship exhaust systems.

Withstands high-salinity and high-temperature environments.

• Automotive & Transportation

Used in high-performance and racing vehicle exhaust systems.

Resists oxidation and creep deformation at elevated temperatures.