NF40 PTC Ni-Fe Alloy Wire with High Nickel Content 50%-55% High Positive Temperature Coefficient for Industrial Heating, Resistance 0.40

The product exhibits a resistivity of 0.40 at a temperature of 20°C, with a tolerance range of ±0.02.

PTC Ni-Fe alloys NF40 with 50-55% nickel content are specialized nickel-iron alloys characterized by their positive temperature coefficient (PTC) properties, meaning their electrical resistance increases as temperature rises. This feature makes them particularly valuable in applications requiring temperature-sensitive response and regulation, such as sensors, thermistors, and self-regulating heating elements. With moderate electrical resistivity and stable performance across a wide range of temperatures, these alloys are suitable for use in demanding environments.

The Ni-Fe alloys in this range are also resistant to corrosion and oxidation, allowing them to perform reliably in harsh conditions, such as those found in automotive, aerospace, and industrial electronics. Their high-temperature durability enables them to function as overcurrent protection devices and in battery management systems, where they help prevent overheating by limiting current flow under elevated temperatures. These alloys are versatile and durable materials, widely applied for advanced thermal management and safety across multiple sectors.

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)

Some Key Features of NF40 Include:

1. Positive Temperature Coefficient (PTC):

The alloy exhibits an increase in resistance as temperature rises, making it ideal for self-regulating applications and temperature-sensitive devices.

2. Moderate Electrical Resistivity:

With a balanced resistivity, NF40 is well-suited for use in components like thermistors, current limiters, and heating elements requiring controlled resistance.

3. Thermal Stability:

NF40 offers stable performance over a wide temperature range, ensuring consistent operation in dynamic thermal environments.

4. Corrosion and Oxidation Resistance:

This alloy is resistant to corrosion and oxidation, making it durable in harsh or high-moisture environments common in automotive, aerospace, and industrial applications.

5. High-Temperature Durability:

NF40 withstands elevated temperatures without significant degradation, providing reliable performance in high-heat applications.

6. Self-Regulating Properties:

The PTC behavior allows the alloy to act as a natural current limiter or heating element, adjusting its resistance with temperature to prevent overheating.

7. Versatility:

NF40 is used in various applications, including temperature sensors, overcurrent protection devices, battery management systems, and heating systems, supporting diverse industries with its reliable and adaptable properties.

These features make NF40 a versatile and efficient choice for advanced thermal management and protection needs.

Applications:

• High Precision Torque Sensors:

The alloy's very low coercive field makes it suitable for use in high precision torque sensors.

• Electromechanical Actuators:

NF40 is used in the production of electromechanical actuators, where its magnetic properties contribute to the efficiency and safety of the devices.

• Temperature-Controlled Induction Heating:

The alloy's tuned Curie point and Hopkinson peak are utilized in non-contact temperature sensing technology, making it ideal for temperature-controlled induction heating applications.

• Additive Manufacturing:

NF40 alloy is used in additive manufacturing to create actuator parts, benefiting from the material's ability to be processed into complex shapes.

• Cut-out Parts for Transformers:

Traditional uses of this alloy include cut-out parts for transformers, where its magnetic properties are advantageous.

• Synchro-Resolvers and Miniaturized Motors:

The alloy is also used in synchro-resolvers and miniaturized motors due to its magnetic characteristics.

• Stamped Parts for High-Sensitivity Relays:

NF40's magnetic properties make it suitable for stamped parts in high-sensitivity relays.

• Low-Frequency Inductors and Current Sensors:

​ The alloy's magnetic properties are utilized in low-frequency inductors and cores for open-loop current sensors.

• Gas Safety Actuators:

NF40 is used in gas safety actuators, where its magnetic properties contribute to the reliability and safety of the devices.

These applications highlight the versatility of the PTC Ni-Fe alloy NF40, which is valued for its magnetic properties, low coercive field, and ability to be tailored for specific technological needs

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.