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Iron Chrome Aluminum Resistance Alloys

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Iron Chrome Aluminum (FeCrAl) alloys are high-resistance materials typically used in applications with maximum operating temperatures up to 1,400°C (2,550°F).

These Ferritic alloys are known to have higher surface loading capability, higher resistivity and lower density than Nickel Chrome (NiCr) alternatives which can translate to less material in application and weight savings. The higher maximum operating temperatures can also lead to longer element life. Iron Chrome Aluminum alloys form a light grey Aluminum Oxide (Al2O3) at temperatures above 1,000°C (1,832°F) which increases corrosion resistance as well as acts as an electrical insulator. The oxide formation is considered self-insulating and protects against short circuiting in the event of metal to metal contact. Iron Chrome Aluminum alloys have lower mechanical strength when compared to Nickel Chrome materials as well as lower creep strength.

Specification of Cold-drawing Round Type heating wire

Diameter(mm)

Tolerance(mm)

Diameter(mm)

Tolerance(mm)

0.03-0.05

±0.005

>0.50-1.00

±0.02

>0.05-0.10

±0.006

>1.00-3.00

±0.03

>0.10-0.20

±0.008

>3.00-6.00

±0.04

>0.20-0.30

±0.010

>6.00-8.00

±0.05

>0.30-0.50

±0.015

>8.00-12.0

±0.4


Specification of Cold-drawing Strip Type 
heating wire

Thickness(mm)

Tolerance(mm)

Width(mm)

Tolerance(mm)

0.05-0.10

±0.010

5.00-10.0

±0.2

>0.10-0.20

±0.015

>10.0-20.0

±0.2

>0.20-0.50

±0.020

>20.0-30.0

±0.2

>0.50-1.00

±0.030

>30.0-50.0

±0.3

>1.00-1.80

±0.040

>50.0-90.0

±0.3

>1.80-2.50

±0.050

>90.0-120.0

±0.5

>2.50-3.50

±0.060

>120.0-250.0

±0.6

 

Alloy Type

Diameter
(mm)

Resistivity
(μΩm)(20°C)

Tensile
Strength
(N/mm²)

Elongation(%)

Bending
Times

Max.Continuous
Service
Temperature(°C)

Working Life
(hours)

1Cr13Al4

0.03-12.0

1.25±0.08

588-735

>16

>6

950

>10000

0Cr15Al5

1.25±0.08

588-735

>16

>6

1000

>10000

0Cr25Al5

1.42±0.07

634-784

>12

>5

1300

>8000

0Cr23Al5

1.35±0.06

634-784

>12

>5

1250

>8000

0Cr21Al6

1.42±0.07

634-784

>12

>5

1300

>8000

1Cr20Al3

1.23±0.06

634-784

>12

>5

1100

>8000

0Cr21Al6Nb

1.45±0.07

634-784

>12

>5

1350

>8000

0Cr27Al7Mo2

0.03-12.0

1.53±0.07

686-784

>12

>5

1400

>8000


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