FeCrAl alloy 0cr21al6Nb Spiral electric hiln heating coil heating element
FeCrAl alloy 0cr21al6Nb Spiral electric hiln heating coil heating element
0Cr21Al6Nb is an iron-chromium-aluminium alloy (FeCrAl alloy) for use at temperatures up to 1350°C (2550°F). The alloy with the characteristics of high resistivity, low temperature coefficient of electric resistance, high operating temperature, good oxidation resistance under high temperature. It can equal to kanthal A1, Alloy875, Resistohm 145, Aluchrom0, Alchrome875, MWS-875, Stablohm875.
It is widely used in industrial electric furnace, household electrical appliance and far infrared ray device.
Such as panel heaters, infrared heaters, warming plates, in cartridge heaters, storage heaters, ceramic heaters for cooking plates, kilns elements, radiators, in quartz tube heaters for space heating, toasters, toaster ovens, industrial infrared dryers, coils on molded ceramic fibre for cooking plates with ceramic hobs and so on.
|
Alloy Nomenclature Performance
|
1Cr13AL4
|
0Cr21AL6
|
0Cr21Al4
|
0Cr27Al7Mo2
|
||||
|
Main Chemical composition |
Cr
|
12.0-15.0
|
23.0-26.0
|
19.0-22.0
|
20.5-23.5
|
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
|
4.2-5.3
|
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(°C)
|
950
|
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)
|
7.4
|
7.1
|
7.16
|
7.25
|
7.35
|
7.1
|
7.1
|
|
|
Thermal conductivity(KJ/m·h·ºC)
|
52.7
|
46.1
|
63.2
|
60.2
|
46.9
|
46.1
|
–
|
|
|
Coefficient of lines expansion(α×10-6/ºC)
|
15.4
|
16
|
14.7
|
15
|
13.5
|
16
|
16
|
|
|
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
|
|
|
continuous service time(Hours/ ºC)
|
–
|
≥80/1300
|
≥80/1300
|
≥80/1300
|
≥80/1250
|
≥50/1350
|
≥50/1350
|
|
|
Micrographic structure
|
Ferrite
|
Ferrite
|
Ferrite
|
Ferrite
|
Ferrite
|
Ferrite
|
Ferrite
|
|
|
Magnetic properties
|
Magnetic
|
Magnetic
|
Magnetic
|
Magnetic
|
Magnetic
|
Magnetic
|
Magnetic
|
|
