Cr20Ni30 Nickel-Chromium-Iron Alloys The Top-Performing Choice for Industrial Electrical Needs

Cr20Ni30 is an austenitic stainless steel alloy composed of 20% chromium and 30% nickel, designed for high-performance applications in harsh environments. Its high chromium content provides excellent resistance to oxidation, while the nickel enhances its toughness, ductility, and resistance to stress-corrosion cracking. This makes Cr20Ni30 particularly effective in high-temperature and corrosive environments.

The alloy’s excellent oxidation resistance allows it to perform well in heat-intensive applications, such as furnaces, gas turbines, heat exchangers, and boiler components. It also maintains superior mechanical properties under thermal cycling, ensuring long-term durability even in fluctuating temperatures. Cr20Ni30 is highly resistant to both acidic and alkaline corrosion, making it suitable for use in chemical reactors, marine environments, and industrial incinerators.

With an austenitic structure, Cr20Ni30 is non-magnetic and offers good weldability, making it versatile for fabrication into complex shapes and structures. Its ability to withstand high temperatures, corrosive media, and mechanical stress also makes it a reliable choice in industries such as aerospace, power generation, and chemical processing.

In summary, Cr20Ni30 is a durable, high-performance alloy known for its resistance to high temperatures, oxidation, and corrosion, making it ideal for demanding industrial applications where reliability and longevity are critical.

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

Some key features of Cr20Ni30 include:

1. Chemical Composition: Cr20Ni30 is a nickel-chromium alloy with approximately 20% chromium (Cr) and 30% nickel (Ni), with the remainder being iron (Fe) and trace amounts of other elements like carbon (C), silicon (Si), and manganese (Mn).
2. Electrical Resistivity: The alloy has a high electrical resistivity, typically around 1.18 Ωmm²/m at 20°C, which is beneficial for applications requiring high resistance values.
3. Temperature Coefficient of Resistance: Cr20Ni30 exhibits a low temperature coefficient of resistance, ensuring minimal resistance change with temperature variations, which is crucial for stability in high-temperature applications .
4. Oxidation Resistance: The alloy demonstrates excellent resistance to oxidation at high temperatures, with the formation of a protective chromium oxide layer that prevents further oxygen penetration.
5. Mechanical Strength: Cr20Ni30 maintains good mechanical strength at high temperatures, with a tensile strength of at least 450 MPa and an elongation rate of ≥25%, indicating good ductility and resistance to deformation.
6. Thermal Stability: It can operate continuously at temperatures up to 1100°C, making it suitable for applications in high-temperature environments.
7. Corrosion Resistance: The alloy shows superior corrosion resistance, particularly in oxidizing conditions, due to its chromium content
8. Thermal Fatigue Resistance: Cr20Ni30 has good resistance to thermal fatigue, which is important for applications involving repeated heating and cooling cycles.
9. Creep Resistance: The alloy exhibits low creep rates at high temperatures, ensuring dimensional stability over extended periods of use.

These characteristics make Cr20Ni30 a preferred material in various industries, particularly those requiring materials with specific electrical properties and resistance to high temperatures and corrosive environments.

Applications:

• Heating Elements: Cr20Ni30 is widely used in electric heating elements for industrial furnaces, electric ovens, and household heaters due to its high electrical resistivity and stability at elevated temperatures.
• Precision Resistors: The alloy is suitable for manufacturing precision resistors and shunt resistors, as it maintains stable resistance values across a wide temperature range.
• Resistance Tape: Cr20Ni30 is utilized in the production of resistance tape for high-quality resistance boxes, ensuring reliable performance in various electrical applications.
• Industrial Heating Equipment: It finds application in various industrial heating equipment, including heat treatment furnaces, where its high-temperature performance and corrosion resistance are essential.
• Aerospace Components: The alloy is employed in aerospace applications for components that require high strength and stability at elevated temperatures.
• Marine Applications: Cr20Ni30 is also used in marine environments for components that require resistance to seawater corrosion and high temperatures.

These applications highlight the versatility of Cr20Ni30 in industries where high performance, durability, and resistance to extreme conditions are critical. For further details on the properties and applications of Cr20Ni30, you can refer to the relevant technical datasheets and industry standards.

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.