TK240 NI40CR20 ALLOY Nickel Chrome NICR Resistance Wire Used for Ceramic Kilns and Glass Furnaces

The maximum operating temperature of TK240 alloy can reach 1150℃, with good oxidation resistance, good corrosion resistance (except sulfur-containing and specific atmospheres), and strong deformation resistance during use. Open coil heating elements can be used

Chemical Composition and Propertes:

Nickel-chrome wire, also known as nichrome wire, is a type of resistance wire that is commonly used in heating applications due to its unique properties.

Key features and characteristics of nickel-chrome wire:

1. Composition:

   • Nickel-chrome wire is typically composed of an alloy containing approximately 40% nickel and 20% chromium.
   • The specific nickel-to-chromium ratio can vary slightly depending on the application requirements.

2. High-Temperature Resistance:

   • Nickel-chrome wire has an exceptionally high melting point, typically ranging from 1,400°C to 1,500°C.
   • This high-temperature resistance allows the wire to operate reliably in environments with elevated temperatures.

3. Electrical Resistivity:

   • Nickel-chrome wire exhibits a relatively high electrical resistivity, usually around 1.00-1.10 microhm-cm at room temperature.
   • This property enables the wire to efficiently convert electrical energy into heat, making it suitable for use as a heating element.

4. Oxidation Resistance:

   • The chromium content in the nickel-chrome alloy forms a protective oxide layer on the surface, providing excellent resistance to oxidation at high temperatures.
   • This oxidation resistance helps maintain the wire's structural integrity and electrical properties over extended periods of use.

5. Mechanical Strength:

   • Nickel-chrome wire has good mechanical strength and hardness, allowing it to maintain its structural integrity under the stresses of high-temperature applications.
   • This mechanical strength is important for applications where the wire is subjected to vibrations or physical stresses.

6. Applications:

   • Nickel-chrome wire is widely used in a variety of heating applications, including:
     • Electric heating elements (e.g., ovens, furnaces, toasters)
     • Industrial heaters and furnaces
     • Heating coils in HVAC systems
     • Heating tapes and cables for industrial and commercial use
     • Heating elements in household appliances

7. Fabrication and Handling:

   • Nickel-chrome wire is typically produced through processes like wire drawing or rolling.
   • Special care must be taken during the handling and installation of nickel-chrome wire to avoid mechanical damage, as the alloy can be brittle.

The combination of high-temperature resistance, electrical properties, and oxidation resistance make nickel-chrome wire a popular choice for resistance heating applications where reliable and efficient heating is required. Its ability to operate at high temperatures while maintaining its structural and electrical characteristics is a key factor in its widespread use across various industries.

Ceramic Kilns NICR Resistance Wire

TK240 NICR Resistance Wire

Glass Furnaces NICR Resistance Wire

TK240 NI40CR20 ALLOY Nickel Chrome NICR Resistance Wire Used for Ceramic Kilns and Glass Furnaces Images