NF40 Nickel Content 50%-55% PTC Ni-Fe Alloy Wire with 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 alloy NF40 with 50-55% nickel content is a specialized nickel-iron alloy known for its positive temperature coefficient (PTC) properties, where electrical resistance increases as temperature rises. This feature makes it ideal for temperature-sensitive and self-regulating applications, as it provides consistent and predictable thermal response. With moderate electrical resistivity and high stability across a wide temperature range, the alloy is widely used in components like temperature sensors, thermistors, and current-limiting devices.

In addition to its PTC behavior, this alloy offers strong corrosion and oxidation resistance, making it suitable for use in harsh environments such as those found in the automotive, aerospace, and industrial electronics sectors. Its high-temperature durability also supports applications in overcurrent protection devices, battery management systems, and self-regulating heating elements. The NF40 alloy's reliable thermal performance and resilience make it a versatile material for advanced thermal management and safety solutions across various industries.

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): This alloy’s resistance increases as temperature rises, making it suitable for applications requiring temperature-sensitive or self-regulating behavior.
2. Moderate Electrical Resistivity: The 50-55% nickel composition provides a balanced resistivity, ideal for components like thermistors, heating elements, and current limiters.
3. Thermal Stability: The alloy maintains consistent performance over a broad temperature range, ensuring reliability in dynamic thermal environments.
4. High Corrosion and Oxidation Resistance: It offers good resistance to oxidation and corrosion, making it durable for use in harsh or industrial environments.
5. High-Temperature Durability: Ni-Fe alloys in this range can withstand elevated temperatures without significant degradation, enhancing their suitability for applications like overcurrent protection and heating systems.
6. Self-Regulating Properties: The PTC nature allows the alloy to self-regulate in heating and protection devices, automatically adjusting resistance to prevent overheating.
7. Versatile Application Range: This alloy is used in temperature sensors, battery management systems, self-regulating heating elements, and overcurrent protection devices, offering flexibility for automotive, aerospace, and industrial applications.

These features make Ni-Fe alloys NF40 valuable for reliable, efficient thermal management and protection in various applications.

Applications:

• High Precision Torque Sensors: Which is similar to Ni-50-55, can achieve a very low coercive field, making it useful for high precision torque sensors.
• Electromechanical Actuators: Additions of elements like copper or chromium & titanium to Fe50Ni50 alloy, which is similar to Ni-50-55, can effectively reduce the remanence and coercive field, which is beneficial for the safety and efficiency of electromechanical actuators.
• Non-Contact Temperature Sensing Technology: The tuned Curie point and Hopkinson peak of Fe50Ni50 type alloys, similar to Ni-50-55, drive new non-contact temperature sensing technology.
• Transformer Components: Traditional uses of FeNi alloys, which are similar to Ni-50-55, continue in applications such as cut-out parts for transformers.
• Synchro-Resolvers and Miniaturized Motors: NF40 alloy's magnetic properties make it suitable for use in synchro-resolvers and miniaturized motors.
• High-Sensitivity Relays: The alloy is used in stamped parts for high-sensitivity relays due to its magnetic characteristics.
• Low-Frequency Inductors: NF40's properties are advantageous in the construction of low-frequency inductors.
• Open-Loop Current Sensors: The alloy's magnetic properties are utilized in the cores for open-loop current sensors.
• Additive Manufacturing: The Fe50Ni50 market, which is similar to Ni-50-55, is expected to grow in the future, thanks in part to the making of actuator parts by additive manufacturing.
• Gas Safety Actuator: The alloy's magnetic properties are also beneficial in gas safety actuators.
• Temperature-Controlled Induction Heating: NF40's tunable magnetic properties make it suitable for temperature-controlled induction heating applications.

These applications highlight the versatility of NF40 in various technological and industrial fields, where its magnetic and mechanical properties are leveraged for high-performance applications.

Support and Services:

1. Technical Consultation

2. Product Selection

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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.