NiCr Alloy Wire Cr20Ni35 Stable Electrical Resistivity For Industrial Furnaces

NiCr Alloy Wire Cr20Ni35 Stable Electrical Resistivity For Industrial Furnaces

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

Key Features of NiCr Alloy Wire Cr30Ni35:

• Composition:

Nickel (Ni): 35% (provides excellent high-temperature stability, corrosion resistance, and electrical resistivity).

Chromium (Cr): 20% (improves oxidation resistance and strength at elevated temperatures).

Iron (Fe): Small amounts (balance), contributing to structural integrity.

Other Elements: Small quantities of manganese, silicon, and carbon for improving fabrication, strength, and weldability.

• High-Temperature Resistance:

Oxidation Resistance: Performs well at temperatures up to 1000°C (1832°F), with chromium forming a protective oxide layer to resist oxidation and prevent further degradation.

Thermal Fatigue Resistance: Can endure repeated heating and cooling cycles without significant loss of strength, making it ideal for industrial heating applications.

• Electrical Resistivity:

Moderate Electrical Resistivity: Offers stable electrical resistance over a wide temperature range, making it suitable for resistors, heating elements, and other electrical components where controlled heating or consistent electrical properties are necessary.

Ideal for use in applications such as furnaces or electrical resistive heating elements, where precise and stable electrical characteristics are crucial.

• Corrosion and Scaling Resistance:

Good Resistance to Corrosion: Particularly effective in oxidizing environments, and performs well in applications where the material is exposed to high temperatures and corrosive gases or vapors.

Sulfidation and Scaling Resistance: Resists scaling and corrosion in environments with high sulfur content or other aggressive atmospheres.

• Mechanical Properties:

Tensile Strength and Ductility: Provides good tensile strength and can withstand mechanical stresses at high temperatures while maintaining adequate ductility for fabrication.

Work Hardening: The alloy may harden when cold-worked, but it remains sufficiently ductile for most forming applications, such as drawing into wire or other shapes.

• Weldability and Fabrication:

Weldability: Can be welded using standard methods, including GTAW (TIG) and GMAW (MIG), with appropriate precautions to avoid cracking and ensure a strong bond.

Formability: Easily drawn into wires, strips, or other shapes, making it versatile for manufacturing heating elements and other specialized components.

​Applications:

• Heating Elements: Commonly used in industrial heating elements, resistors, and furnaces, where high temperatures and stable electrical properties are essential.
• Electrical Components: Suitable for resistors and thermocouples that require reliable performance in high-heat applications.
• High-Temperature Furnaces: Often used in high-temperature industrial applications like furnaces, ovens, and dryers that require resistance to oxidation and thermal cycling.

Technical data of wires

The tolerance or wires diameter

Technical data of ribbon

Advantages of NiCr Alloy Wire Cr20Ni35:

• High-Temperature Stability: Ideal for high-temperature applications like heating elements and industrial furnaces, with stable mechanical properties even in extreme heat.
• Excellent Oxidation Resistance: Provides strong protection against oxidation and scaling, ensuring a long service life in demanding environments.
• Reliable Electrical Properties: Maintains consistent electrical resistance, making it perfect for use in resistors, heating coils, and temperature sensors.
• Weldability and Formability: Can be processed and fabricated into various shapes, such as wire or strip, for a wide range of applications.
• Durable in Harsh Environments: Suitable for environments where corrosive gases, scaling, or sulfur exposure could degrade other materials.

Limitations of NiCr Alloy Wire Cr30Ni35:

• Cost: Higher cost compared to standard alloys due to the nickel and chromium content.
• Limited Resistance to Highly Acidic Environments: While resistant to oxidation and scaling, it may not perform well in highly acidic or chloride-rich environments compared to more specialized alloys.
• Work Hardening: As with other high-strength alloys, it can work-harden during cold working, which may require more care during processing.

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.