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High Performance NF40 PTC Ni-Fe Alloy Wire In Industrial Heating

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High Performance NF40 PTC Ni-Fe Alloy Wire In Industrial Heating

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Brand Name :Senphus
Model Number :NF40
Certification :SGS, ISO9001
Place of Origin :Jiangsu, China
MOQ :5 kg
Price :TBD
Payment Terms :T/T, D/P
Supply Ability :30 Tons Per Day
Delivery Time :3 days
Packaging Details :Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated.
Product name :PTC Ni-Fe Alloy Wire NF40
Material :Ni, Fe
Application :Industrial Heating
Diameter :0.05 mm-30 mm
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NF40 PTC Ni-Fe Alloy Wire with Positive Temperature Coefficient for Advanced Thermal Management and Safety Resistance 0.40

The product exhibits a resistivity of 0.40 at a temperature of 20°C, with a tolerance range of ±0.02.

NF40 PTC Ni-Fe Alloy (Ni 50%-55%) is a high performance nickel-iron alloy known for its Positive Temperature Coefficient (PTC) behavior, where electrical resistivity increases with rising temperature. This property makes it ideal for temperature sensing, current regulation, and overcurrent protection. The alloy features superior magnetic properties, including high permeability and low coercivity, making it suitable for soft magnetic applications such as transformers, inductors, and magnetic shielding.
NF40 offers high electrical resistivity, minimizing energy losses, and exhibits excellent thermal stability, ensuring consistent performance across a wide temperature range. Its nickel content provides exceptional corrosion resistance, while good mechanical strength and ductility make it easy to process into various forms like wires and strips.
This alloy is widely used in industrial heating systems, precision sensors, automotive electronics, and consumer devices where reliability, durability, and stable magnetic and resistive properties are critical. Combining thermal, electrical, and magnetic stability, NF40 is a versatile material for demanding applications in electronics, automotive, and industrial sectors.

Main Chemical Composition Wt.% NF40 PTC Ni-Fe Alloy % Ni Fe
Min 50
Max 55 Bal.

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

Some Key Features of NF40 Include:

  1. Positive Temperature Coefficient (PTC):

    • Exhibits increased electrical resistivity as temperature rises, ideal for temperature sensing, current regulation, and overcurrent protection.
  2. Superior Magnetic Properties:

    • High magnetic permeability and low coercivity, making it suitable for soft magnetic applications like transformers, inductors, and chokes.
  3. High Electrical Resistivity:

    • Reduces energy losses, enhancing efficiency in magnetic circuits and electronic devices.
  4. Thermal Stability:

    • Performs reliably across a wide temperature range, ensuring consistent resistive and magnetic properties under varying conditions.
  5. Corrosion Resistance:

    • Nickel content ensures excellent resistance to oxidation and corrosion, extending the material’s lifespan in harsh environments.
  6. Mechanical Strength and Ductility:

    • Easy to form into wires, strips, or other components, making it versatile for manufacturing complex shapes.
  7. Versatile Applications:

    • Suitable for use in magnetic shielding, heating elements, precision sensors, and electronic protection devices.
  8. Durability and Reliability:

    • Combines resistive, thermal, and magnetic stability with long-lasting performance in demanding industrial and electronic systems.

NF40’s balance of electrical, magnetic, and thermal properties makes it a preferred choice for precision applications in industries like automotive, electronics, and industrial manufacturing.

Applications:

  • Temperature Sensing and Control:

    • Utilized in thermistors and temperature-sensitive resistors for precision temperature monitoring and control in industrial and electronic systems.
  • Overcurrent Protection:

    • Acts as a current limiter in circuits, increasing resistance at higher currents or temperatures to protect components from damage.
  • Magnetic Components:

    • Used in soft magnetic cores for transformers, inductors, and chokes, ensuring efficient energy transfer with minimal losses.
  • Magnetic Shielding:

    • Provides protection against external magnetic interference in sensitive electronic equipment and precision devices.
  • Industrial Heating Systems:

    • Integrated into self-regulating heating elements, where its Positive Temperature Coefficient ensures controlled and safe heating.
  • Automotive Electronics:

    • Found in temperature and current-sensitive devices in automotive systems, such as sensors and resistors, for safe and reliable operation.
  • Consumer Electronics:

    • Applied in circuit protection devices for household appliances, ensuring durability and preventing overheating or overcurrent issues.
  • Precision Sensors and Actuators:

    • Used in high-accuracy sensing devices that require stable resistive and magnetic properties over a wide temperature range.

NF40’s combination of thermal, electrical, and magnetic stability makes it versatile for applications in industrial, automotive, and electronic systems requiring reliable performance under varying conditions.

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.

High Performance NF40 PTC Ni-Fe Alloy Wire In Industrial HeatingHigh Performance NF40 PTC Ni-Fe Alloy Wire In Industrial HeatingHigh Performance NF40 PTC Ni-Fe Alloy Wire In Industrial Heating

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