NF46 PTC Ni-Fe Alloy Wire Low Curie Point and Medium Saturation Polarization for Inductors and Current Sensors, Resistance0.46
NF46 PTC Ni-Fe Alloy (Ni 45%-50%, Resistance: 0.46 Ω·mm²/m) is a nickel-iron alloy designed for applications requiring stable resistive, magnetic, and thermal properties. Its Positive Temperature Coefficient (PTC) behavior ensures that resistivity increases with temperature, making it ideal for temperature regulation, overcurrent protection, and self-regulating heating systems.
The alloy features moderate electrical resistivity (0.46 Ω·mm²/m), high magnetic permeability, and low coercivity, making it efficient in soft magnetic applications such as transformers, inductors, and magnetic shielding. It offers thermal stability across wide temperature ranges and good corrosion resistance, ensuring long-term durability even in demanding environments.
NF46 is mechanically versatile, with excellent ductility and machinability, allowing for easy fabrication into wires, strips, and other forms. It is widely used in industrial heating systems, temperature-sensitive devices, magnetic components, and overcurrent protection systems.
With its balanced nickel content, thermal reliability, and PTC behavior, NF46 provides dependable performance for industrial, automotive, and electronic applications that require precision, stability, and durability.
Main Chemical Composition Wt.% NF46 PTC Ni-Fe Alloy | % | Ni | Fe |
Min | 45 | ||
Max | 50 | Bal. |
Some Key Features of NF46 Include:
Positive Temperature Coefficient (PTC):
Moderate Electrical Resistivity:
Magnetic Properties:
Thermal Stability:
Corrosion Resistance:
Mechanical Versatility:
Wide Application Range:
Balanced Nickel Content (45%-50%):
Durable and Reliable:
NF46’s combination of PTC behavior, precise resistivity, and thermal reliability makes it an excellent choice for diverse industrial, automotive, and electronic applications.
Applications:
Temperature Sensing and Regulation:
Overcurrent Protection:
Self-Regulating Heating Elements:
Magnetic Components:
Magnetic Shielding:
Industrial Heating Systems:
Automotive Electronics:
Consumer Electronics:
Renewable Energy Systems:
Aerospace and Defense:
Precision Instrumentation:
NF46’s balanced resistivity, thermal stability, and magnetic efficiency make it a versatile alloy for applications in industrial, automotive, and electronic fields.
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 |