Product Description

NF38 Nickel Content 50-55 PTC Ni-Fe Alloy Wire Rod for Precise Resistance Control in Thermistors and Sensors, Resistance 0.38

The product exhibits a resistivity of 0.38 at a temperature of 20°C, with a tolerance range of ±0.02.

PTC Ni-Fe alloy NF38 Ni50%-55% is a nickel-iron alloy with a composition of 50-55% nickel and 45-50% iron, known for its positive temperature coefficient (PTC) characteristics. As temperature increases, this alloy's electrical resistance rises, making it ideal for applications that require temperature-sensitive or self-regulating properties. Ni50%-55% alloy combines moderate electrical resistivity with strong thermal stability, providing consistent performance across a broad temperature range.

This alloy is commonly used in temperature sensors, thermistors, and self-regulating heating elements, where precise resistance control is essential. It is also well-suited for overcurrent protection devices, such as circuit breakers and fuses, as its resistance increases with heat, effectively limiting current flow in response to high temperatures and preventing circuit damage. NF38 offers good corrosion and oxidation resistance, allowing it to perform reliably in harsh conditions, which is particularly beneficial in automotive, aerospace, and industrial applications.

In addition, the alloy is used in battery management systems and other thermal control applications, where effective temperature regulation is critical for safety and efficiency. With its dependable thermal response, durability, and versatility, NF38 is a trusted material for advanced thermal management and protective applications across various industries.

Key features of PTC Ni-Fe alloy with NF38 include:

Low Coercive Field:

This alloy can achieve a very low coercive field, which is beneficial for high precision torque sensors

Tuning of Magnetic Properties:

Additions of copper or chromium & titanium can effectively reduce the remanence and the coercive field of the alloy

Tuned Curie Point:

The alloy has a tuned Curie point and Hopkinson peak, which are driving new non-contact temperature sensing technology

Soft Magnetic Material Behavior:

When austenitic, Fe-Ni materials exhibit great plasticity and soft magnetic material behavior with low magnetic anisotropy energies

Medium Saturation Polarization:

At room temperature, the alloy has a medium amplitude of saturation polarization (0.3 < Jsat ≤ 1.5 T)

Low Curie Temperature:

Industrial austenitic FeNi(Cr,Mo,etc) alloys are characterized by a low Curie point (20 < Tc < 450°C)

Magnetic Annealing:

Induced anisotropy Ku, obtained by magnetic annealing of wound core, lowers the magnitudes of Jr and µ

Optimization of Magnetic Performances:

The optimization is controlled by lowering the number of precipitates whose size is close to the domain wall thickness

These features make NF38 type alloys suitable for a variety of applications, including torque sensors, gas safety actuators, temperature-controlled induction heating, and the making of actuator parts by additive manufacturing

Applications:

High Precision Torque Sensors

Electromechanical Actuators

Temperature-Controlled Induction Heating

Transformer Components

Synchro-Resolvers

Miniaturized Motor

High-Sensitivity Relays

Low-Frequency Inductors

Current Sensors

Additive Manufacturing

These applications highlight the versatility of Ni-50-55 alloy in various technological and industrial sectors, particularly where specific magnetic properties are required.

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. 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.