NF32 Nickel Content 50-55 PTC Ni-Fe Alloy Wire Rod for Electric
Heating Blanket, Resistance 0.32
The product exhibits a resistivity of 0.32 at a temperature of
20°C, with a tolerance range of ±0.02.
PTC Ni-Fe alloy with a nickel content of 50%-55% is a specialized
nickel-iron alloy designed for temperature-sensitive applications
due to its positive temperature coefficient (PTC) properties. This
alloy sees an increase in electrical resistance as temperature
rises, making it ideal for applications where precise thermal
control is required. With moderate electrical resistivity and high
thermal stability, it performs reliably across a wide temperature
range, providing stable and predictable responses in various
environments.
This Ni-Fe alloy is commonly used in temperature sensors,
thermistors, and self-regulating heating elements, where accurate
resistance adjustments with temperature are crucial. Its
durability, along with strong corrosion and oxidation resistance,
allows it to function effectively in demanding conditions,
including automotive, aerospace, and industrial applications.
Additionally, its PTC behavior makes it valuable in overcurrent
protection devices, fuses, and current limiters, where it helps
prevent overheating by increasing resistance to control current
flow.
In battery management systems, this Ni-Fe alloy aids in thermal
regulation, contributing to the safety and efficiency of
battery-powered equipment. Overall, Ni-Fe alloy with 50%-55% nickel
content is a versatile and robust material for advanced thermal
management and protective applications across multiple industries.
| Main Chemical Composition Wt.% NF32 PTC Ni-Fe Alloy | % | Ni | Fe |
| Min | 50 | |
| Max | 55 | Bal. |
Some key features of NF32 include:
1. Low Coercive Field:
NF32 alloys can exhibit a very low coercive field, which is
beneficial for high precision torque sensors.
2. Tunable Magnetic Properties:
The magnetic properties of these alloys can be tuned by adding
elements like copper or chromium & titanium, which effectively
reduce the remanence and the coercive field.
3. Curie Point and Hopkinson Peak:
These alloys have a tuned Curie point and Hopkinson peak, which are
advantageous for new non-contact temperature sensing technology.
4. Great Plasticity and Soft Magnetic Behavior:
When austenitic, these fcc Fe-Ni materials exhibit great plasticity
and very soft magnetic material (SMM) behavior with respect to
magnetic anisotropy energies.
5. Low Curie Point:
Industrial austenitic FeNi(Cr,Mo,etc) alloys, which are similar to
NF32 are characterized by a low Curie point (20 < Tc < 450
°C).
6. Saturation Polarization:
These alloys have a saturation polarization of medium amplitude at
room temperature, which is a significant property for magnetic
applications.
7. Shape Memory Effect:
Ni-Fe alloys, in general, are known for their shape memory effect,
which is crucial for applications requiring materials that can
return to their original shape after deformation.
8. Corrosion Resistance:
Ni-Fe alloys typically offer good corrosion resistance, making them
suitable for use in harsh environments.
9. High Workability:
These alloys are often easy to work with, allowing for the creation
of complex shapes and structures through processes like high energy
ball milling.
10. Potential for Technological Applications:
The ongoing research and development in the field of Fe-Ni alloys,
including NF32, are focused on improving their magnetic properties
and expanding their applications in various technological fields.
These features make NF32 alloys suitable for a range of
applications, including precision sensors, actuators, and
components in devices that require specific magnetic properties.
Applications of PTC Ni-Fe alloy NF32 include:
NF32 is commonly used in temperature sensors and thermistors, where
its PTC properties allow precise temperature monitoring and
regulation in industries like automotive, HVAC, and industrial
control systems.
- Self-Regulating Heating Elements:
The alloy's PTC behavior makes it ideal for self-regulating heating
elements in electric heaters, defrosters, and other thermal
management systems, as it adjusts its resistance with temperature
changes.
- Overcurrent Protection Devices:
NF32 is used in fuses, circuit breakers, and other overcurrent
protection devices, where it prevents excessive current flow by
increasing resistance under high-temperature conditions, ensuring
safety in electrical systems.
- Battery Management Systems:
In electric vehicles and battery-powered devices, NF32 helps
maintain thermal stability by regulating temperatures, protecting
batteries from overheating, and enhancing the safety and
performance of battery management systems.
- Current Limiting Devices:
NF32 is employed in current limiting devices, where its resistance
increases with temperature to prevent electrical overloads and
protect sensitive components in electronic circuits.
- Automotive and Aerospace Electronics:
Due to its durability and thermal stability, NF32 is used in
various electronic components in the automotive and aerospace
industries, where reliable performance under extreme temperature
conditions is required.
These applications leverage NF32's ability to self-regulate,
maintain stability in high temperatures, and resist corrosion,
making it ideal for critical thermal management and protection
functions.
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. Can this product be made into alloy wire?
Yes, each product model can be made in the diameter range of
0.05mm-30mm, can be customized.
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.
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.
