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Main characteristics of Fe-Cr-Al high resistance and electric heating alloys

    Alloy Nomenclature

Performance

1Cr13Al4

0Cr25Al5

0Cr21Al6

0Cr23Al5

0Cr21Al4

0Cr21Al6Nb

0Cr27Al7Mo2

Main
Chemical
composition

Cr

12.0-15.0

23.0-26.0

19.0-22.0

22.5-24.5

18.0-21.0

21.0-23.0

26.5-27.8

Al

4.0-6.0

4.5-6.5

5.0-7.0

4.2-5.0

3.0-4.2

5.0-7.0

6.0-7.0

Re

opportune

opportune

opportune

opportune

opportune

opportune

opportune

Fe

Rest

Rest

Rest

Rest

Rest

Rest

Rest

           

Nb0.5

Mo1.8-2.2

Max. continuous service 
temp. of element

650

1250

1250

1250

1100

1350

1400

Resistivity at 20ºC
 (
μΩ·m)

1.25

1.42

1.42

1.35

1.23

1.45

1.53

Density 
(g/cm3)

7.40

7.10

7.16

7.25

7.35

7.10

7.10

Thermal conductivity
(KJ/m
·h·ºC)

52.7

46.1

63.2

60.2

46.9

46.1

45.2

Coefficient of lines expansion
(
α×10-6/ºC)

15.4

16.0

14.7

15.0

13.5

16.0

16.0

Melting point 
(approx.)(
ºC)

1450

1500

1500

1500

1500

1510

1520

Tensile strength 
(N/mm2)

580-680

630-780

630-780

630-780

600-700

650-800

680-830

Elongation at 
rupture (%)

>16

>12

>12

>12

>12

>12

>10

Variation of area (%)

65-75

60-75

65-75

65-75

65-75

65-75

65-75

Repeat bending 
frequency (F/R)

>5

>5

>5

>5

>5

>5

>5

Hardness (H.B.)

200-260

200-260

200-260

200-260

200-260

200-260

200-260

Micrographic 
structure

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Magnetic 
properties

Magnetic

Magnetic

Magnetic

Magnetic

Magnetic

Magnetic

Magnetic

Note:types and sizes list in this table are common ones.We also provide other special types.

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