NF32 PTC Ni-Fe Alloy Wire Rod with 50%-55% Nickel Content for
Stable Resistance in Various Environments Resistance 0.32
The product exhibits a resistivity of 0.32 at a temperature of
20°C, with a tolerance range of ±0.02.
NF32 PTC Ni-Fe Alloy Wire (Ni 50%-55%) is a nickel-iron alloy
designed for applications requiring precise thermal and electrical
properties. Its Positive Temperature Coefficient (PTC) behavior
ensures that resistivity increases with temperature, making it
ideal for temperature sensing, control, and overcurrent protection
devices. The wire exhibits excellent magnetic properties, including
high permeability and low coercivity, which make it suitable for
soft magnetic applications like transformers, inductors, and
magnetic shielding.
The alloy features high electrical resistivity, which minimizes
energy losses in magnetic circuits, and offers thermal stability
across a broad temperature range, ensuring consistent performance
in demanding environments. Its corrosion resistance is enhanced by
the nickel content, contributing to longevity in various operating
conditions.
Mechanical properties such as good ductility and machinability
allow the wire to be manufactured in precise forms for specialized
uses. NF32 is widely used in precision instruments, thermistors,
magnetic cores, and electronic components where stable resistive
and magnetic performance is critical. Combining reliability,
durability, and versatility, NF32 PTC Ni-Fe Alloy Wire is a
valuable material for industrial, electrical, and electronic
applications.
| Main Chemical Composition Wt.% NF32 PTC Ni-Fe Alloy | % | Ni | Fe |
| Min | 50 | |
| Max | 55 | Bal. |
Some key features of NF32 include:
1. Positive Temperature Coefficient (PTC):
Exhibits increased electrical resistivity with rising temperature,
making it suitable for temperature control, sensing, and
overcurrent protection.
2. Magnetic Properties:
High permeability and low coercivity, ideal for soft magnetic
applications such as magnetic cores, transformers, and inductors.
3. High Electrical Resistivity:
Reduces energy losses in magnetic circuits, enhancing efficiency in
electrical systems.
4. Thermal Stability:
Provides consistent performance across a wide temperature range,
making it reliable for demanding environments.
5. Corrosion Resistance:
The nickel content ensures resistance to oxidation and corrosion,
enhancing durability in harsh conditions.
6. Mechanical Properties:
Good ductility and machinability, enabling manufacturing in precise
forms like wires, sheets, and other components.
7. Versatile Applications:
Used in thermistors, precision instruments, magnetic shielding, and
electronic components where consistent magnetic and resistive
properties are essential.
8. Durability:
Combines thermal, electrical, and magnetic stability with
long-lasting performance in industrial, electrical, and electronic
systems.
Applications:
Temperature Sensing and Control:
- Used in thermistors and temperature-sensitive resistors to regulate
and monitor temperature in heating elements, electronic circuits,
and industrial equipment.
Overcurrent Protection Devices:
- Serves as a current limiter in electronic circuits by increasing
resistance at higher currents or temperatures, preventing damage to
components.
Magnetic Cores:
- Applied in transformers, inductors, and chokes due to its soft
magnetic properties, ensuring efficient energy transfer and minimal
losses.
Magnetic Shielding:
- Provides shielding in electronic devices to prevent interference
from external magnetic fields, improving device reliability.
Precision Instrumentation:
- Integrated into high-accuracy sensors and control systems requiring
stable magnetic and electrical properties over varying
temperatures.
Electronic and Automotive Components:
- Used in resistors, sensors, and other electronic parts in
automotive systems for temperature and current regulation.
Industrial Heating Elements:
- Applied in self-regulating heating elements, where its PTC property
ensures stable and safe operation.
Consumer Electronics:
- Included in circuit protection for household appliances, protecting
circuits from overheating or overcurrent conditions.
NF32’s unique combination of resistive, thermal, and magnetic
properties makes it versatile for diverse industries, including
electronics, automotive, and industrial manufacturing.
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.
