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.