Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire High Electrical Resistivity NiCr Alloy For Electric Heating And Furnace Components

Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire High Electrical Resistivity NiCr Alloy for Electric Heating and Furnace Components

Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire is a nickel-chromium alloy consisting of 20% chromium and 80% nickel, known for its excellent high-temperature stability, oxidation resistance, and electrical resistivity. It is primarily used in applications that require high resistivity and high-temperature performance, making it ideal for heating elements, resistors, and industrial furnaces. Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire is a nickel-chromium alloy widely used for high-temperature applications requiring oxidation resistance, high electrical resistivity, and thermal stability. Its excellent performance in heating elements, resistors, and industrial furnaces makes it ideal for industries such as electric power generation, chemical processing, and electronics. Although it comes at a higher cost due to its nickel content, its durability in demanding environments justifies its use in critical applications where performance, stability, and longevity are essential.

Trade Code

Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys

Some key features of Cr20Ni80 include:

• Composition:

Nickel (Ni): 80% (provides high electrical resistivity and ensures the alloy's stability at elevated temperatures).

Chromium (Cr): 20% (enhances the oxidation and corrosion resistance, contributing to high-temperature durability).

Iron (Fe): Minimal amounts, contributing to overall strength and cost-effectiveness.

Other Elements: Small quantities of silicon, carbon, and manganese to improve strength, workability, and overall mechanical properties.

• High-Temperature Resistance:

Oxidation Resistance: The high chromium content (20%) ensures excellent oxidation resistance in high-temperature environments, typically up to 1150°C (2102°F). This protective oxide layer prevents degradation and oxidation, even when exposed to oxidative gases and extreme heat.

Thermal Stability: Excellent thermal stability under fluctuating temperature conditions, making it ideal for heating elements in high-temperature systems.

• Electrical Resistivity:

High Electrical Resistivity: The alloy has a high electrical resistivity, which makes it highly effective in applications where controlled heat generation or electrical resistance is needed. Its stable resistance is a key characteristic in resistive heating elements.

Temperature Coefficient of Resistance (TCR): It maintains a stable TCR over a wide temperature range, ensuring consistent performance in resistive heating applications.

• Corrosion and Scaling Resistance:

Superior Oxidation Resistance: The chromium in the alloy forms a protective oxide layer at high temperatures, making it resistant to oxidation in air and oxidizing gases, which can cause other materials to degrade.

Sulfidation Resistance: It also resists sulfidation, ensuring durability in high-temperature industrial processes that may involve sulfur or sulfur-based compounds.

• Mechanical Properties:

Tensile Strength and Ductility: The alloy provides good tensile strength at elevated temperatures and is sufficiently ductile to be drawn into wires, coils, and other shapes for various applications.

Fatigue Resistance: The material can withstand thermal cycling and fatigue from heating and cooling without significant structural damage, making it suitable for resistive heating elements and other high-stress, high-heat environments.

• Weldability and Fabrication:

Weldability: Cr20Ni80 alloy can be welded using standard techniques like TIG (Tungsten Inert Gas) or MIG (Metal Inert Gas) welding. However, it is important to control heat input during welding to avoid degradation of the material's properties.

Formability: The wire can be drawn into thin strands, coiled, or formed into other shapes, making it ideal for various industrial heating elements, resistors, and thermocouple wires.

Applications:

• Heating Elements: NiCr8020 is commonly used in high-temperature heating elements, such as those found in industrial furnaces, electric ovens, and dryers.
• Resistors: Its high electrical resistivity makes it suitable for use in resistors, electrical heating components, and resistance temperature detectors (RTDs).
• Industrial Furnaces: Frequently used in high-temperature furnace components, such as heating coils, radiant tubes, and thermal insulation elements.
• Thermocouples and Sensors: Used in temperature sensors and thermocouples for high-temperature applications where stable electrical resistance is required.

Advantages of Cr20Ni80 (80Ni20Cr, NiCr8020) Alloy Wire:

• Excellent High-Temperature Performance: Can operate at temperatures up to 1150°C (2102°F) without significant oxidation or degradation, making it ideal for high-temperature applications.
• Superior Oxidation and Corrosion Resistance: The 20% chromium content ensures excellent resistance to oxidation, corrosion, and scaling in high-heat and oxidative environments.
• Stable Electrical Resistivity: The alloy offers stable electrical resistance, making it ideal for resistive heating elements, precision resistors, and other applications requiring consistent electrical characteristics.
• Durable in Harsh Environments: Excellent performance in environments that involve repeated heating and cooling cycles, thermal shock, or oxidizing gases.
• Versatility in Fabrication: Easily processed into various forms, including wire, coils, strips, and other shapes, suitable for a wide range of industrial applications.

Technical data of wires

The tolerance or wires diameter

Technical data of ribbon

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.