Cr20Ni35 Nickel-Chromium-Iron Alloy With Good Mechanical Properties And Electrical Conductivity

Cr20Ni35 Nickel-Chromium-Iron Alloy with Good Mechanical Properties and Electrical Conductivity

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

Some key features of Cr20Ni35 include:

1. High-Temperature Resistance: Cr20Ni35 can be used continuously at temperatures up to 1150°C, making it suitable for high-temperature applications such as furnace linings and heat exchanger pipes

2. Corrosion Resistance: Thanks to its high chromium and nickel content, Cr20Ni35 exhibits excellent resistance to oxidation and corrosion, especially in acidic and alkaline environments

3. Oxidation Resistance: The alloy forms a dense layer of chromium oxide (Cr2O3) at high temperatures, which protects against further oxidation, maintaining mechanical strength and ductility even at temperatures above 1000°C

4. Resistivity: Cr20Ni35 has a high resistivity of approximately 1.1×10^-6 Ω·m at 20°C, which is beneficial for electric heating applications to improve efficiency and reduce energy loss

5. Mechanical Strength: The alloy maintains good mechanical properties at high temperatures, with a tensile strength of 600-800 MPa and an elongation of 20%-40%, indicating good structural stability and ductility

6. Thermal Expansion Coefficient: Cr20Ni35 has a linear expansion coefficient of 14-16×10^-6/°C (20°C-1000°C), which is important for designing high-temperature heating equipment due to its impact on dimensional changes

7. Thermal Fatigue Resistance: The alloy exhibits low thermal fatigue, suitable for high-temperature heating elements, with a stress relaxation rate of about 1.0-1.5% per hour at 1000°C

8. Chemical Composition: Cr20Ni35 is composed of 20% chromium and 35% nickel, with the remainder being iron and trace amounts of other elements like silicon and manganese, which contribute to its overall performance

These features make Cr20Ni35 an ideal material for applications requiring high temperature and corrosion resistance, such as in the manufacturing of electric heating elements and industrial furnace components.

​Applications:

1. Industrial Heating Elements: Cr20Ni35 is commonly used in industrial heating equipment as a heating element material due to its stable resistance properties and excellent oxidation resistance at high temperatures

2. Heat Treatment Equipment: The alloy is used in the manufacturing of heating elements for heat treatment equipment, capable of withstanding temperatures above 1000°C and maintaining stable resistance values and mechanical strength

3. Chemical Industry: Cr20Ni35 is suitable for use in the chemical industry for high-temperature reaction equipment heating elements and heaters in corrosive environments due to its corrosion resistance

4. Petroleum and Chemical Equipment: It is used in equipment such as high-temperature reactors and cracking furnace pipelines, which are often in high-temperature, high-pressure, and corrosive gas environments

5. Aerospace Industry: Cr20Ni35 is widely used in high-temperature equipment like aviation engines and gas turbines due to its excellent high-temperature performance

6. Power Industry: The alloy is used in the manufacturing of high-temperature boilers, heat exchangers, and supercritical water-cooled wall tubes in coal-fired power plants, where its resistance to high temperatures and oxidation is fully utilized

7. Electrical Resistance Devices: Cr20Ni35 is used in the production of electrical resistance devices, such as high-precision resistors, due to its high resistance stability and low temperature coefficient, making it suitable for high-precision measuring instruments

These applications leverage Cr20Ni35's superior properties, including high-temperature resistance, corrosion resistance, and stable electrical resistivity, making it an ideal material for a variety of high-temperature and corrosive environments.

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.