fecral alloy is one kind of resistance heating alloy which used in a wide range of resistance and high temperature applications. It is mainly comsisted by iron, chromium and aluminium. Meanwhile its’ resistivity grow as the increase of the composition of Cr and Al content!
Performance Material
1Cr13Al4
0Cr21Al6
0Cr23Al5
0Cr25Al5
0Cr20Al6RE
0Cr21Al6Nb
0Cr24Al6RE
0Cr27Al7Mo2
Chemical Composition %
Cr
12.0-15.0
19.0-22.0
20.5-23.5
23.0-26.0
19.0-21.0
21.0-23.0
22.0-26.0
26.5-27.8
Al
4.0-6.0
5.0-7.0
4.2-5.3
4.5-6.5
5.0-6.0
5.0-7.0
5.0-7.0
6.0-7.0
Fe
Rest
Rest
Rest
Rest
Rest
Rest
Rest
Rest
Other
–
–
–
–
**
**
**
**
Max Working Temperature, ℃
950
1250
1300
1300
1300
1350
1400
1400
Resistivity, μΩ·m, 20℃
1.25
1.42
1.35
1.42
1.40
1.45
1.48
1.53
Density, g/cm3
7.4
7.16
7.25
7.1
7.2
7.1
7.1
7.1
Thermal Conductivity, W/(m•K)
15
13
13
13
13
13
13
13
Coefficient of Lines Expansion, α×10-6/℃
15.4
14.7
15
15
14
16
16
16
Melting Point approx, ℃
1450
1500
1500
1500
1500
1510
1520
1520
Tensile Strength, N/mm2
580-680
630-780
630-780
630-780
630-780
650-800
680-830
680-830
Elongation at Rupture, %
>16
>12
>12
>12
>12
>12
>12
>10
Variation of Area, %
65-75
65-75
65-75
65-75
65-75
65-75
65-75
65-75
Repeat Bending Frequency, F/R
>5
>5
>5
>5
>5
>5
>5
>5
Hardness H.B.
200-260
200-260
200-260
200-260
200-260
200-260
200-260
200-260
Continuous Service Time Hours/ ℃
–
≥80/1300
≥80/1300
≥80/1300
≥50/1350
≥50/1350
≥80/1350
≥50/1350
Micrographic Structure
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Magnetic Properties
Magnetic
Magnetic
Magnetic
Magnetic
Magnetic
Magnetic
Magnetic
Magnetic