Data Sheet: FeCrAl Alloys

Learn more about each nickel speciality alloy

  • FeCrAl Iron Nickel Heating Element and Resistance Alloy Grades

FeCrAl Alloys: Heating Element & Resistance

These are ferromagnetic alloys whose electrical resistance properties are similar to those of the Nickel-Chromium alloys, making them suitable for electrical heating applications. Although absence of nickel makes them cheaper than Nickel-Chromium alloys, it also makes them more prone to corrosion. Care should be taken to operate these heating elements in dry conditions to minimize corrosion. Exposure to high temperatures can also lead to creep and embrittlement, but with adequate support elements, these problems can be avoided.

JLC manufactures FeCrAl for special resistance and heating applications only.

FeCrAl 125 is used as a low cost heating element that can operate at temperatures up to 1150 °C. It is used for high temperature load resistors, braking and starting resistors, and domestic appliances.

FeCrAl 135 can be used for heating elements up to 1200 °C. It offers better high temperature strength as compared to FeCrAl125. Typical applications include hot plates, irons, and electric furnaces. It is also used in resistors, lab furnaces, and heavy relay switches.

Forms of Supply

  • Bright Annealed
  • Oxidized (Blue & Golden)
  • As-Drawn


Alloy Werkstoff Nr UNS designation DIN
FeCrAl 125 1.4725 K91670 17470
FeCrAl 135 (1.4767) - 17470

Nominal Chemical Composition (%)

Alloy Fe Cr C Al
FeCrAl 125 Balance 14-16 Max 0.1 3.5-5.0
FeCrAl 135 Balance 18-24 Max 0.1 4.0-6.0

Physical & Mechanical Properties (at room temperature)

Alloy Density Thermal Conductivity Coeff. of
Linear Expansion
between 20-1000 °C
Temp. Coeff.
of Resistance
between 20-1000 °C
Max. Operating
Temp of
Heating Element
g/cm³ W/m.K 10-6/°C x 10-6/°C °C
FeCrAl 125 7.30 14.5 14.00 1.10 1150
FeCrAl 135 7.25 13.5 15.00 1.00 1200

Long Life & Design Help

All our alloys have gone through extensive life tests and are proven to last longer than other equivalent alloy grades available in the market. These wires are made with high quality raw materials from the melting/alloying stage. Our team of engineers can help you to select the appropriate grade/size and design coiled-wire heating elements for your specific applications.

Size Range

Form Dia Width Thickness
mm mm mm
Wire 0.15 - 8.0 - -
Strip - 10 - 40 2.0 - 4.5
Ribbon - > 0.2 0.5 - 1.0

Other Grades of heating element and resistance alloys (including NiCr alloys) are also available. Please contact us for more information.

Click here to download this data sheet in PDF format.

Related Links


Nickel Alloys

Standard Nickel Grades:

Nickel-Manganese Alloys:

Nickel-Copper Alloys:

Welding Alloys Heating & Resistance

Nickel-Chromium Alloys:

Iron-Chrome-Aluminum Alloys

Nickel Chrome Iron Alloys Low Resistance & Shunt Alloys

Cu-Ni Low Resistance Alloys:

Cu-Mn-Ni Alloys:

Lamp Components & Alloys Thermocouple Alloys

Thermocouple Grade Alloys:

Extension and Compensating Grade Alloys:

Automotive Alloys

Alloys for Earth and Central Electrodes:

  • NiSi
  • NiCr15Fe
  • NiCr5SiMn
  • NiCr2SiMn
  • NiSi1Al1Y
Soft Magnetic Alloys

Temperature Compensating Alloys:

  • Ni30Fe
  • Ni31Fe
  • Ni32Fe

High Permeability Alloys:

  • SMA 50 (Ni50Fe)
Controlled Expansion Alloys
Dumet Wires
Clad Wires
  • Copper-Clad FeNi42
  • Copper-Clad FeNi60
  • Iron-Clad Nickel
  • Nickel-Clad Iron