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Photos 1 Comparison of FeCrAl and NiCr 2 Commonly Used types 3 How to choose resistance heating wire Customers who bought this product also bought

High Resistance Alloy Wire resistance wire

resistance wire, also known as alloy heating wire, is the source of heat for electric heating elements, are used for the manufacture of heating elements, thermocouples and a range of highly demanding high temperature applications.

Our high resistance electric heating alloy is stable in performance, allowing high surface load, having small specific gravity and stable co-efficiency in temperature and a high working temperature with maxim of 1400°C. Besides, we have twelve different kinds of alloys, each type has its own temperature ranges and resistivity.

We can also supply other products according to your requirement, coiled wires, wave-shaped wires and different kinds of standard or non-standard electrical heating elements.

Comparison of FeCrAl and NiCr

Ferrum-Chromium-Aluminium (FeCrAl) alloys

Main advantages: The operating temperature of FeCrAl alloy is high and it can reach as high as 1400°C. (0Cr21A16Nb, 0Cr27A17Mo2, etc.) While it has a long lifespan, it also has a high surface load. Additionally, it is characterized by exceptionally good oxidation resistance, high resistivity, cheap prices, etc.

Main disadvantages: It is mainly exhibited in its low strength under high-temperature environment. With the rise of its operating temperature, its ductility soars resulting in the components to be easily deformed. Furthermore, the components cannot be readily bent and repaired.

Nickel-Chromium (NiCr) alloys

Main advantages: Notwithstanding its high strength relative to FeCrAl alloy, it is not easily deformed under high temperature. In addition, its structure is also not readily changed while it has comparatively better ductility. Moreover, it also has a high radiation and it is non-magnetic in nature. On top of that, it is corrosion resistance and it also has a long lifespan.

Main disadvantages: As it is made from the scarce nickel metals, the prices of its series of products are higher up to a few times that of FeCrAl alloy. Besides, its operating temperature is lower than that of the FeCrAl alloy.

Commonly Used types

  • Ni80Cr20 - Usually called nickel-chromium wire, non-magnetic, often used in the manufacture of single-ended electric heating elements and high-power density electric heating elements. Nickel-chromium wire has good mechanical properties, good stability at high temperatures and does not oxidize when charged in the air.
  • 0Cr25Al5 - Usually called iron-chromium wire, magnetic, relatively cheap, widely used in electric heaters, Iron-chromium wire is easily oxidized in air by electricity, more brittle.
  • Other Grades

Cr15Ni60 and Cr20Ni30 nickel-chromium-iron alloy are more widely used high-resistance electric heating alloys. They have high resistivity, good oxidation resistance, wear resistance, mechanical processing, and welding properties, as well as more resilient at high temperatures. The alloys are suitable for metallurgy, chemical industry, machinery, glass, ceramics, household appliances and other industrial sectors to manufacture heat generating elements, various types of motor voltage regulating resistors and braking resistors.

PTC thermistor alloy wire – possess medium resistance rate, high positive resistance temperature coefficient. The material is widely used in a variety of electric heaters with automatic temperature control. Some of its advantages include automatic power regulation, constant current, current limiting, energy saving, long practical life and many others. Resistance temperature coefficient TCR:0-100℃-6≥(3000-5000) x 10/℃, resistivity: 0-100℃ 0.20-0.38μ Ω.m.

How to choose resistance heating wire

How to choose the best material and diameter for the resistance heating wire on their applications, or how to choose the best product that has relatively higher price-performance ratio under the appropriate working environment and usage requirements. We will discuss with everyone the methods to be used for choosing the best resistance heating wire in the following section.

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