NF36 PTC Ni-Fe Alloy Wire for Current-Limiting Components in
Industrial and Commercial Circuits,Resistance 0.36
The product exhibits a resistivity of 0.36 at a temperature of
20°C, with a tolerance range of ±0.02.
PTC Ni-Fe alloy NF36 is a nickel-iron alloy with a composition
range of 50% to 55% nickel and the balance in iron. Known for its
positive temperature coefficient (PTC) properties, this alloy’s
resistance increases with rising temperature, making it ideal for
temperature-sensitive applications. NF36 is particularly valued in
industries requiring precise thermal control, such as automotive,
aerospace, and industrial electronics. Its moderate electrical
resistivity and reliable thermal stability enable it to perform
consistently over a wide temperature range, making it suitable for
components like temperature sensors, thermistors, and
self-regulating heating elements.
The alloy’s corrosion resistance and high-temperature durability
also make it a strong candidate for harsh environments, ensuring
long-lasting performance under extreme conditions. It’s frequently
used in overcurrent protection devices, where the alloy’s
resistance change helps prevent overheating by limiting current
flow. Additionally, NF36 is utilized in battery management systems
and other temperature-control applications, where it enhances
safety and efficiency through reliable thermal regulation. With its
unique combination of PTC behavior, stability, and resilience, NF36
is a versatile and dependable material for advanced thermal
management and protection in various industries.
| Main Chemical Composition Wt.% NF36 PTC Ni-Fe Alloy | % | Ni | Fe |
| Min | 50 | |
| Max | 55 | Bal. |
Some key features of NF36 include:
- Low Coercive Field
- Tunable Magnetic Properties
- Curie Point and Hopkinson Peak
- Metallurgical Solutions
- Magnetic Anisotropy
- Saturation Polarization
- Shape Memory Effect
- Superelasticity
- Corrosion Resistance
- Thermal Stability
These features make PTC Ni-Fe alloys like NF36 ideal for use in
precision instruments, sensors, actuators, and other applications
where magnetic properties, dimensional stability, and resistance to
environmental factors are critical.
Applications:
1. Temperature Sensors:
NF36 is used in temperature sensors where its PTC properties enable
accurate temperature monitoring by providing a resistance change as
the temperature fluctuates.
2. Thermistors:
The alloy is commonly used in thermistors, which are devices that
rely on temperature-sensitive resistance for applications in
temperature sensing and regulation.
3. Self-Regulating Heating Elements:
Due to its positive temperature coefficient, NF36 is ideal for
self-regulating heating elements, such as in electric heaters,
defrosters, and heating mats, where the heat output adjusts based
on temperature changes.
4. Overcurrent Protection Devices:
The alloy is used in fuses, circuit breakers, and other protective
devices, where its resistance increases with temperature to limit
current flow and prevent overheating or damage in electrical
circuits.
5. Battery Management Systems:
NF36 is employed in battery management systems to help regulate
temperature and prevent overheating in lithium-ion and other
rechargeable batteries, ensuring safe and efficient operation.
6. Current Limiting Devices:
NF36 is used in current limiters, where its PTC behavior helps
prevent excessive current by automatically increasing resistance as
temperature rises, protecting sensitive electronic components.
7. Automotive and Aerospace Electronics:
The alloy’s high temperature and corrosion resistance make it
suitable for automotive and aerospace applications, such as
sensors, resistors, and other critical components exposed to harsh
conditions.
These applications leverage the alloy’s thermal stability,
self-regulating properties, and reliability in demanding
environments.
Resistance Values and Naming Conventions for PTC Ni-Fe Alloy Wires
| Alloy brand | 20℃ Resistivity | The tolerance range |
|
| NF13 | 0.13 | ±0.02 |
| NF15 | 0.15 | ±0.02 |
| NF20 | 0.20 | ±0.02 |
| NF23 | 0.23 | ±0.02 |
| NF25 | 0.25 | ±0.02 |
| NF32 | 0.32 | ±0.02 |
| NF36 | 0.36 | ±0.02 |
| NF38 | 0.38 | ±0.02 |
| NF40 | 0.40 | ±0.02 |
| NF43 | 0.43 | ±0.02 |
| NF46 | 0.46 | ±0.02 |
| NF52 | 0.52 | ±0.02 |
| NF60 | 0.60 | ±0.02 |
Chemical Composition of Different Models of PTC Ni-Fe Alloy Wire
| Alloy brand | Chemical element |
|
| Ni % | Fe % |
| NF13 | 85-95 | Rest |
|
| NF15 | 75-85 | Rest |
| NF20 | 70-75 | Rest |
| NF23 | 60-65 | Rest |
| NF25 | 60-65 | Rest |
| NF32 | 50-55 | Rest |
| NF36 | 50-55 | Rest |
| NF38 | 50-55 | Rest |
| NF40 | 50-55 | Rest |
| NF43 | 45-50 | Rest |
| NF46 | 45-50 | Rest |
| NF52 | 45-50 | Rest |
| NF60 | 45-50 | Rest |
Temperature Coefficients of Different Models of PTC Ni-Fe Alloy
Wire
| Alloy brand | 120℃ Temperature coefficient PPM | The tolerance range PPM |
|
| NF13 | 4200 | ±300 |
| NF15 | 4400 | ±300 |
| NF20 | 4500 | ±300 |
| NF23 | 4800 | ±300 |
| NF25 | 4600 | ±300 |
| NF32 | 4200 | ±300 |
| NF36 | 3800 | ±300 |
| NF38 | 4000 | ±300 |
| NF40 | 3800 | ±300 |
| NF43 | 3400 | ±300 |
| NF46 | 3200 | ±300 |
|
| NF52 | 3000 | ±300 |
|
| NF60 | 2500 | ±300 |
|
Mechanical properties (tensile strength)
| Category | Diameter range
mm | Elongation rate
≥ % |
|
| Cold drawn wire | 0.05 ＞ d ＜ 0.1 | ≥ 18 |
| 0.1 ＞ d ＜ 0.3 | ≥ 20 |
| 0.3 ＞ d ＜ 0.5 | ≥ 20 |
| 0.5 ＞ d ＜ 1.0 | ≥ 20 |
Size (diameter)
| Alloy Code | Diameter mm |
| Wire | Rod | Wire rod |
| NF13 | 0.05-8.0 | 12-30 | 8-14 |
| NF15 | 0.05-8.0 | 12-30 | 8-14 |
| NF20 | 0.05-8.0 | 12-30 | 8-14 |
| NF23 | 0.05-8.0 | 12-30 | 8-14 |
| NF25 | 0.05-8.0 | 12-30 | 8-14 |
| NF32 | 0.05-8.0 | 12-30 | 8-14 |
| NF36 | 0.05-8.0 | 12-30 | 8-14 |
| NF38 | 0.05-8.0 | 12-30 | 8-14 |
| NF40 | 0.05-8.0 | 12-30 | 8-14 |
| NF43 | 0.05-8.0 | 12-30 | 8-14 |
| NF46 | 0.05-8.0 | 12-30 | 8-14 |
| NF52 | 0.05-8.0 | 12-30 | 8-14 |
| NF60 | 0.05-8.0 | 12-30 | 8-14 |
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.
