PTC Ni-Fe Alloy NF20 Wire Widely Used in Electronics Aerospace and Automotive Industries for its Exceptional Performance, Resistivity 0.20

The product exhibits a resistivity of 0.20 at a temperature of 20°C, with a tolerance range of ±0.02.

The PTC Ni-Fe alloy, commonly referred to as NF20, is a nickel-iron alloy comprising approximately 75% nickel. It exhibits unique properties that make it particularly suitable for use in temperature-sensitive and electronic applications, thanks to its positive temperature coefficient (PTC). As temperature increases, NF20 alloy’s resistance also rises, which is essential for applications needing precise thermal control and temperature-dependent resistance adjustments.

This alloy is valued for its high electrical resistivity, thermal stability, and corrosion resistance, making it ideal for producing components in electrical heating systems, such as resistors and thermistors, and for temperature sensors in various industries. Additionally, NF20’s durability in high-temperature and corrosive environments extends its application potential in demanding conditions, such as those found in aerospace, automotive, and industrial electronics.

Some key features of PTC Ni-Fe alloy NF20 include:

1. High Nickel Content (75%): With a high nickel content, NF20 provides excellent corrosion resistance, especially in harsh or high-temperature environments.
2. Positive Temperature Coefficient (PTC): This alloy’s resistance increases with temperature, making it ideal for applications where precise temperature monitoring or control is required.
3. High Electrical Resistivity: NF20’s resistivity remains stable even under fluctuating thermal conditions, ensuring consistent performance over a range of temperatures.
4. Thermal Stability: NF20 alloy can maintain its structure and resistive properties at high temperatures, making it suitable for use in demanding environments like industrial electronics.
5. Durability in Harsh Environments: Resistant to oxidation and corrosion, NF20 is well-suited for use in long-lasting applications in the aerospace, automotive, and energy sectors.
6. Magnetic Properties: The alloy has controlled magnetic properties, which are beneficial in applications requiring magnetic stability alongside thermal sensitivity.

Applications of PTC Ni-Fe alloy NF20 include:

• Thermoelectric Devices:
  • NF20 alloy is used in thermoelectric devices due to its positive temperature coefficient (PTC) effect, which allows for self-regulation of heat in response to temperature changes .
• Heating Elements:
  • The alloy's PTC properties make it suitable for use in heating elements, particularly in applications where precise control of heat output is required .
• Sensor Technology:
  • NF20 alloy can be employed in sensor technology, leveraging its temperature-dependent resistivity for temperature sensing and control .
• Automotive Industry:
  • In the automotive industry, the alloy is used for making components that require high-temperature strength and resistance to corrosive environments .
• Aerospace:
  • NF20 alloy is utilized in aerospace applications where its combination of strength, corrosion resistance, and temperature stability is beneficial .
• Microelectromechanical Systems (MEMS):
  • The alloy's magnetic properties and mechanical properties make it suitable for use in MEMS, including micromolds and electrodes .
• Electromagnetic Devices:
  • NF20 alloy finds application in electromagnetic devices such as transformers and inductors, due to its high saturation magnetization and low coercivity .
• Catalytic Converters:
  • The alloy's resistance to high temperatures and corrosive environments makes it suitable for use in catalytic converters within the automotive industry.

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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)

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