FeCrAl Resistance Heating Alloys - Heanjia Super-metals Co., Ltd.

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FeCrAl Resistance Heating Alloys

The resistance heating alloys can be divided into two main groups.

The FeCrAl and the NiCr based alloys. For lower temperature applications CuNi and NiFe based alloys are also used. The different alloys are described below as well as a comparison of some of the properties of the FeCrAl and the NiCr based alloys.

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Kanthal Replacing Furnace Wire

Ferritic Alloys (FeCrAl)

Up to 1425 °C 2560 °F: KANTHAL APM (Normally used in furnace applications).

Up to 1400 °C 2550 °F: KANTHAL A-1 (Normally used in furnace applications).

Up to 1350 °C 2460 °F: KANTHAL A is used for appliances, where its highresistivity and good oxidation resistance are particularly important.

Up to 1300 °C 2370 °F: KANTHAL AF has improved hot strength and oxidationproperties and is especially recommended where good form stability properties incombination with high temperature is required.

Up to 1300 °C 2370 °F: KANTHAL AE is developed to meet the extreme demands infast response elements in glass top hobs andquartz tube heaters. It has exceptional formstability and life in spirals with large coil towire diameter ratio.

Up to 1300 °C 2370 °F: KANTHAL D Employed chiefly in appliances, its highresistivity and low density, combined withbetter heat resistance than austenitic alloys,make it suitable for most applications.

Up to 1100 °C 2010 °F: ALKROTHAL is typically specified for rheostats, brakingresistors, etc. It is also used as a heating wirefor lower temperatures, such as heatingcables.

Chemical composition:

Elements	Cr	Al	Fe	Re
% (weight)	25.0	6.0	Rest	appropriate amount

Properties:

Max. Temp	Resistivity (20°C)	Density	Melting Point	Elongation	Accelerated life test (1350°C.h)	Number of Bends	Magnetic
1400°C	1.45u·Ω·m	7.10g/cm3	1500°C	16-33%	>60	7-12	Yes

Resistance-temperature coefficient (Ct)	800°C	1000°C	1200°C
Resistance-temperature coefficient (Ct)	1.03	1.04	1.04

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