NF38 Nickel Content 50-55 PTC Ni-Fe Alloy Wire Rod for Precise Resistance Control in Thermistors and Sensors, Resistance 0.38

The product exhibits a resistivity of 0.38 at a temperature of 20°C, with a tolerance range of ±0.02.

PTC Ni-Fe alloy NF38 Ni50%-55% is a nickel-iron alloy with a composition of 50-55% nickel and 45-50% iron, known for its positive temperature coefficient (PTC) characteristics. As temperature increases, this alloy's electrical resistance rises, making it ideal for applications that require temperature-sensitive or self-regulating properties. Ni50%-55% alloy combines moderate electrical resistivity with strong thermal stability, providing consistent performance across a broad temperature range.

This alloy is commonly used in temperature sensors, thermistors, and self-regulating heating elements, where precise resistance control is essential. It is also well-suited for overcurrent protection devices, such as circuit breakers and fuses, as its resistance increases with heat, effectively limiting current flow in response to high temperatures and preventing circuit damage. NF38 offers good corrosion and oxidation resistance, allowing it to perform reliably in harsh conditions, which is particularly beneficial in automotive, aerospace, and industrial applications.

In addition, the alloy is used in battery management systems and other thermal control applications, where effective temperature regulation is critical for safety and efficiency. With its dependable thermal response, durability, and versatility, NF38 is a trusted material for advanced thermal management and protective applications across various industries.

Key features of PTC Ni-Fe alloy with NF38 include:

1. Low Coercive Field:

This alloy can achieve a very low coercive field, which is beneficial for high precision torque sensors

2. Tuning of Magnetic Properties:

Additions of copper or chromium & titanium can effectively reduce the remanence and the coercive field of the alloy

3. Tuned Curie Point:

The alloy has a tuned Curie point and Hopkinson peak, which are driving new non-contact temperature sensing technology

4. Soft Magnetic Material Behavior:

When austenitic, Fe-Ni materials exhibit great plasticity and soft magnetic material behavior with low magnetic anisotropy energies

5. Medium Saturation Polarization:

At room temperature, the alloy has a medium amplitude of saturation polarization (0.3 < Jsat ≤ 1.5 T)

6. Low Curie Temperature:

Industrial austenitic FeNi(Cr,Mo,etc) alloys are characterized by a low Curie point (20 < Tc < 450°C)

7. Magnetic Annealing:

Induced anisotropy Ku, obtained by magnetic annealing of wound core, lowers the magnitudes of Jr and µ

8. Optimization of Magnetic Performances:

The optimization is controlled by lowering the number of precipitates whose size is close to the domain wall thickness

Applications:

• High Precision Torque Sensors
• Electromechanical Actuators
• Temperature-Controlled Induction Heating
• Transformer Components
• Synchro-Resolvers
• Miniaturized Motor
• High-Sensitivity Relays
• Low-Frequency Inductors
• Current Sensors
• Additive Manufacturing

These applications highlight the versatility of Ni-50-55 alloy in various technological and industrial sectors, particularly where specific magnetic properties are required.

Resistance Values and Naming Conventions for PTC Ni-Fe Alloy Wires

Chemical Composition of Different Models of PTC Ni-Fe Alloy Wire

Temperature Coefficients of Different Models of PTC Ni-Fe Alloy Wire

Mechanical properties (tensile strength)

Size (diameter)

Support and Services:

1. Technical Consultation

2. Product Selection

3. Time Guarantee

4. Warranty and After-Sales Support

Q&A:

1. What is the minimum order quantity?

The MOQ is 5kg, but if you need samples, please contact us.

2. Are your products safe and environmentally friendly?

Our products have passed the SGS test report, for the European Chemicals Agency and WTO concern SVHC content below the specified 0.1%, and passed the ISO9001 quality system certification.

2. How to choose products with different diameters and resistivity

We have product experts who are familiar with the use of the scenario to help determine the product, you can send email or contact us via chat software.

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.