Incoloy800H/NS112A/UNS N08810/1.4876 Nut For Nuclear Power Plants Corrosion-Resistant High Temperature Alloy Nut For Heat Exchangers

Incoloy 800H nuts are high-performance fasteners made from a nickel-iron-chromium alloy designed for high-temperature and corrosion-resistant applications. With enhanced creep and rupture strength due to its controlled carbon content (0.05–0.10%), Incoloy 800H is ideal for use in heat exchangers, furnace components, power plants, and petrochemical processing. The alloy offers excellent resistance to oxidation, carburization, and sulfidation at elevated temperatures up to 1100°C (2012°F). It also maintains structural stability and resists stress corrosion cracking in acidic and chloride-rich environments. These nuts conform to ASTM B408 and DIN 1.4876 standards, ensuring reliable mechanical properties. Commonly used in demanding industrial applications, Incoloy 800H nuts provide long service life and superior performance in harsh conditions.

Trade Code

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

1. High-Temperature Strength

• Excellent creep and stress rupture resistance at temperatures up to 1100°C (2012°F).
• Maintains structural integrity under prolonged exposure to high heat.

2. Corrosion & Oxidation Resistance

• Superior oxidation and carburization resistance in oxidizing and reducing environments.
• Resists sulfur attack, making it ideal for harsh industrial applications.

3. Excellent Mechanical Properties

• Enhanced yield strength and tensile strength due to controlled carbon content and grain size stabilization.
• Retains toughness and ductility even in extreme conditions.

4. Chemical Composition Benefits

• Nickel (30-35%) provides corrosion resistance.
• Chromium (19-23%) enhances oxidation and scaling resistance.
• Iron (39.5% min) ensures structural stability.
• Low carbon content prevents sensitization and intergranular corrosion.

5. Superior Fabricability & Weldability

• Easy to machine, form, and weld using standard techniques.
• Compatible with most welding methods, including TIG, MIG, and submerged arc welding.

The Incoloy 800H (also known as NS112A, UNS N08810, and 1.4876) is a high-temperature, corrosion-resistant nickel-iron-chromium alloy. Nuts made from this material are commonly used in demanding applications requiring excellent strength, oxidation resistance, and carburization resistance at elevated temperatures.

Applications of Incoloy 800H Nuts

• Petrochemical and Chemical Processing

Heat exchangers, reactors, and piping systems in corrosive environments.

High-temperature structural components exposed to acidic and sulfur-containing atmospheres.

• Power Generation

Steam generators, superheater supports, and heat recovery systems.

Used in boilers, turbine components, and coal gasification plants.

• Aerospace and Aviation

Jet engine components and exhaust systems.

Parts exposed to extreme heat and oxidation.

• Heat Treatment Equipment

Furnace fixtures, retorts, and baskets.

Fasteners for high-temperature kilns and annealing equipment.

• Nuclear Industry

Structural components in nuclear reactors due to radiation and thermal resistance.

Fuel element supports and nuclear waste processing equipment.

• Marine and Offshore Engineering

Corrosion-resistant fasteners in seawater environments.

Used in heat exchangers for desalination plants and offshore drilling rigs.