NF25 PTC Ni-Fe Alloy Wire The Preferred Solution for Safety and Precision in Thermal Regulation, Resistance 0.25

PTC Ni-Fe alloy NF25 is a nickel-iron alloy with 60% nickel, featuring a positive temperature coefficient that makes it ideal for temperature-sensitive applications.

NF25’s unique composition allows its electrical resistance to increase with temperature, making it suitable for applications that demand precise thermal response and stability. With moderate resistivity and reliable thermal performance across a broad temperature range, NF25 is frequently used in temperature sensors, current-limiting devices, and heating elements. The alloy's high-temperature durability and corrosion resistance ensure dependable operation in harsh environments, making it a popular choice in automotive, aerospace, and industrial electronics.

NF25 is also valuable in overcurrent protection devices and battery management systems, where thermal regulation is critical to performance and safety. Its versatility and stability make it an essential material for advanced thermal management and protective applications across multiple sectors.

Key features of the PTC Ni-Fe alloy NF25 include:

1. Anti-Galling: NF25 alloy has excellent anti-galling properties, which is beneficial in applications where components need to resist sticking or seizing.

2. Wear Resistance: This alloy is known for its high wear resistance, making it suitable for parts that are subjected to high wear conditions.

3. Versatility in Forms: NF25 alloy is available in various forms such as round wire, bars or lengths, flat wire, profile wire, ropes/strands, offering flexibility for different applications.

4. Diverse Packaging Options: The alloy can be supplied in different packaging options like coils, spools, bars or lengths, to cater to the diverse needs of customers.

5. Technical Specifications: NF25 alloy has specific chemical compositions and physical properties, such as a density of 7.6 g/cm³, a melting point of 1375 °C, a thermal expansion coefficient of 15.8 μm/m °C (21 – 200 °C), and an elastic modulus of 181 kN/mm².

6. Heat Treatment Options: Different heat treatment options are available, such as annealing or spring tempering, to meet various mechanical property requirements.

7. Corrosion Resistance: NF25 alloy exhibits good corrosion resistance, making it suitable for use in harsh environments.

8. Thermal Stability: The alloy has high thermal stability, making it suitable for high-temperature working conditions.

9. Welding Performance: NF25 is a nickel-iron-based filler metal that is well-suited for welding dissimilar materials such as cast iron and high-alloy steel, heat-resistant steel, or low-carbon steel, offering excellent weldability and strong crack resistance.

These characteristics make NF25 alloy valuable in a wide range of industrial applications, including valve stems, pins, brushes, ball bearings, pump shafts and rings, threaded sleeves, and fasteners.

Applications:

• Aerospace Industry: NF25 alloy is used in aerospace applications for its high strength, corrosion resistance, and dimensional stability. It is particularly useful in the manufacturing of aircraft components, such as bearings, where its high hardness and corrosion resistance are beneficial .

• Medical Applications: Due to its biocompatibility and shape memory effect, NF25 is used in medical devices such as surgical instruments, orthodontic wires, and implants .
• Automotive Engineering: The alloy's wear resistance and high strength make it suitable for automotive components, including actuators and sensors .
• Marine Applications: NF25's excellent corrosion resistance makes it ideal for marine environments, where components are exposed to saltwater and other corrosive elements .
• Food Processing Industry: The alloy's non-magnetic properties and resistance to corrosion and wear make it suitable for use in food processing equipment, where hygiene and durability are crucial .
• Robotics: NF25 is used in robotics for its shape memory effect and superelasticity, which allow for precise movements and force control .
• Civil Engineering: In civil engineering, NF25 can be used in structures that require high durability and resistance to environmental factors, such as bridges and buildings .
• Elastocaloric Devices: The alloy's unique thermomechanical properties make it suitable for use in devices that utilize the heat exchange associated with phase transformations .
• Tribological Applications: NF25's wear resistance and low friction characteristics are beneficial in tribological applications, such as bearings and gears, where reduced wear and tear are desired .
• Energy Conversion Systems: Due to its high energy conversion efficiency, NF25 can be used in fuel cells and other energy conversion systems .

These applications highlight the versatility and importance of NF25 alloy in modern engineering and technology .

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. Can you provide free samples?

If the samples you need happen to be in stock, we can provide samples free of charge.

2. If we use custom products, will the price be higher?

Usually our prices are higher for special products, because it is related to production efficiency, but all prices depend on the quantity of the order.

3. What is the minimum quantity the customer can order?

If the stock of the required product is sufficient, we can provide a single copy as a sample, if the stock is insufficient, the minimum order quantity is 5kg.