Cr20Ni80/80Ni20Cr/NiCr8020 Corrosion-Resistant NiCr Alloy with High Nickel Content for Electric Heating and Furnace Components

Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire is a versatile and reliable nickel-chromium alloy that excels in high-temperature applications, offering excellent oxidation resistance, high electrical resistivity, and mechanical stability. It is widely used in electric heating elements, resistors, furnaces, and thermocouples, making it a critical material in industries that require precision heating and resistance at elevated temperatures. While it is more expensive than other alloys, its superior performance in harsh thermal and oxidative environments makes it a preferred choice for demanding applications. Cr20Ni80 / 80Ni20Cr / NiCr8020 Wire is a high-performance nickel-chromium alloy that contains 20% chromium and 80% nickel. This alloy is known for its high electrical resistivity, excellent oxidation resistance, and outstanding high-temperature strength, making it a popular choice for resistance heating elements, high-temperature applications, and resistors.

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-temperature strength, excellent resistance to oxidation, and stable electrical resistivity).

Chromium (Cr): 20% (enhances the alloy's oxidation resistance and improves its strength at high temperatures).

Iron (Fe): Small amounts (balance, used for maintaining alloy's mechanical properties).

Other Elements: Traces of manganese, silicon, and carbon are also present to enhance workability, strength, and resistance to oxidation.

• High-Temperature Resistance:

Oxidation Resistance: With 20% chromium, the alloy forms a stable oxide layer, preventing excessive oxidation even at temperatures up to 1100°C (2012°F). This makes it ideal for high-temperature environments where other materials would fail.

Thermal Stability: Maintains excellent mechanical properties and strength even under extreme temperatures, ensuring reliable long-term performance in high-heat applications.

• Electrical Resistivity:

High Electrical Resistivity: The high nickel content gives this alloy excellent electrical resistivity, making it ideal for use in heating elements, resistors, and electrical components that require stable electrical resistance over a range of temperatures.

Stable Temperature Coefficient of Resistance (TCR): NiCr8020 exhibits a stable TCR, which is important for maintaining consistent resistance even as temperature fluctuates, ensuring predictable heating performance.

• Corrosion and Scaling Resistance:

Oxidation Resistance: The alloy's chromium content ensures that it performs well in oxidizing environments, preventing scaling and oxidation even at high temperatures.

Sulfidation Resistance: Performs well in environments that may contain sulfur, ensuring it does not degrade quickly under high-temperature oxidative and sulfidation conditions.

• Mechanical Properties:

Tensile Strength: Exhibits good tensile strength at high temperatures, allowing it to withstand mechanical stresses during operation.

Ductility and Formability: While offering excellent mechanical strength, the alloy retains sufficient ductility for processing into wire, strip, or coil forms, making it highly versatile.

• Weldability and Fabrication:

Weldability: NiCr8020 wire is weldable using standard techniques such as TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding, although precautions should be taken to avoid excessive heat input to prevent embrittlement in the welded areas.

Ease of Fabrication: Can be easily drawn into wire or formed into coils and strips for use in heating elements, resistors, and other components.

Applications:

• Heating Elements: One of the most common uses is in electric heating elements, especially in high-temperature furnaces, industrial ovens, and dryers, where the alloy’s high resistivity and stable resistance are critical for efficient and controlled heating.
• Resistors: Frequently used in high-power resistors and other electrical components where stable electrical characteristics are necessary for precise control in electrical circuits.
• Industrial Furnaces: Ideal for components such as heating coils and radiant heaters in furnaces and heating systems that require long-term durability at high temperatures.
• Thermocouples and Sensors: Used in temperature sensors and thermocouples for applications where accurate temperature measurements are necessary in high-heat environments.

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

• High-Temperature Performance: Can withstand temperatures up to 1100°C (2012°F), making it suitable for extreme heat environments like electric heating elements, resistors, and furnaces.
• Superior Oxidation Resistance: Offers excellent resistance to oxidation, ensuring it lasts longer in high-temperature oxidative environments.
• Stable Electrical Resistivity: Provides stable electrical resistance even at high temperatures, which is important for precision resistors and heating elements.
• Corrosion Resistance: Excellent resistance to sulfidation and scaling, ensuring durability in harsh industrial environments.
• Weldability and Fabrication: Easy to process into wire, coils, and strips, and can be welded for use in custom 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.