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.

Company Overview:

Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and preci.sion of our products. We have the tightest tolerances and deliver within a few days to a fewweeks. As a result, we have become the leading alloy wire supplier in the industry.

Senphus Subsidiaries:

• Jiangyin Chengxin Alloy Material Co., Ltd.
• Jiangyin Senphus Electrical Materials Co., Ltd.
• Jiangsu Xiangcheng Supply Chain Management Co., Ltd.

Jiangyin Chengxin Alloy Material Co., Ltd.: With nearly 20 years of experience, Jiangyin Chengxin is a leading alloy wire manufacturer in China. We offer a wide range of services, from fine wire drawing to resistance wire manufacturing. Our specialty lies in the quality and precision of our products, achieving the tightest tolerances and delivering orders within days to weeks. As a result, we have established ourselves as the premier supplier of alloy wire in the industry.

Our product range includes:

• Copper-nickel alloys (CuNi1-CuNi44)
• Karma (Nikrothal L/Evanohm/Alloy 800)
• Manganin and Constantan
• Nickel-chromium alloys
• Thermocouple alloys (Type K, N, E, T, J)
• Thermocouple extension wire
• PTC thermistor resistance alloy
• Pure nickel wire and Monel alloy

These alloys are available in various forms, including wire, ribbon, stranded, and enamelled. Major applications include seat heating, underfloor heating, military projects, aerospace, household appliances, heating wire, mechanical and electrical plants, and temperature instruments. Our manufacturing processes are ISO 9001:2015 certified, and we specialize in fine and ultra-fine wire drawing, offering wire diameters from 0.025 mm (0.001") to 13 mm (0.51") in small batches, medium volumes, and mass production. We maintain a comprehensive quality inspection system, including in-house chemical analysis, chromatographic analysis, metallurgical analysis, pinhole tests, wire construction tests, and tension tests to ensure the highest quality standards.

Senphus Electrical Material Co., Ltd.: Founded in 2003, Senphus Electrical Material Co., Ltd. integrates research, manufacturing, and sales of electric heating alloys, heating cables, heating wires, and heating products. Leveraging over a decade of technical expertise in heating alloy wire, we have adopted advanced heating cable technology and machinery, successfully developing heating cables, temperature controllers, and temperature control systems suitable for building heating, pipe insulation, outdoor snow melting, wind power blade production, car seat heating, and healthcare applications.

The company is recognized as a high-tech enterprise in Jiangsu Province and a small giant enterprise in Jiangyin City, specializing in innovative technologies. We operate the "Wuxi Heating Cable Engineering Technology Research Center" and collaborate with experts from renowned domestic universities. Our portfolio includes 5 invention patents and over 30 utility model patents, showcasing our strong research and development capabilities.

With an annual output exceeding 1,000 tons of thermal alloy wire and an output value of approximately 105 million yuan, our products are well-received in markets such as the UK, Italy, Canada, Peru, and Spain. Our heating cables generate an annual output value of over 80 million yuan, with exports to Germany, Japan, the United States, Malaysia, Denmark, Brazil, and other countries.

The company has successfully passed multiple quality management system certifications, including IATF 16949, ISO 9001, ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). Our heating cables and related products have also obtained test reports from the Shanghai Cable Research Institute Test Center and received certifications such as UL (United States), VDE (Germany), CE (European Union), and RoHS.

Commitment to Quality: We adhere to the business commitment of "Reputation First, Quality First, Customer First" and uphold the quality policy of "Integrity-Based, Quality-Oriented, Excellent Service." We are dedicated to providing accurate products and professional services, and we look forward to collaborating sincerely with you to achieve mutual success.