Heat Resistant Alloy Resistance strip
1. General Description
FeCrAl alloy is made by a high-temperature, ferritic iron-chromium-aluminium alloy which can be used at temperatures up to 1350degrees. Typical applications for 0Cr21Al6Nb are as electrical heating elements in high-temperature furnaces in the heat treating, ceramics, glass, steel, and electronics industries.
2. Chemical Composition
0Cr21Al6Nb Cr: 21.0-23.0% Al: 5.0-7.0% Fe: Balance Nb: Opportune 0.5
Adequacy 0.5
3. Properties
Alloy Specific Resistance (at 20° Cµ Ω -m): 1.45+-0.07
Hardness: 200-260
Linear Expansion Coeff. (T=20-1000degrees): 16.0X10-6
Melting Point: 1510
Max ContinuousService Temperance: 1350
4. Sizes:
Wire diameter: 0.15mm-8.0mm
Strip:
1). Electric ceramic cooktop resistance strip:
Thickness: 0.04mm-1.0mm
Width: 5mm-12mm
Thickness&Width: (0.04mm-1.0mm)× 12mm(above)
2). Low resistance ribbon:
Thickness&Width: (0.2mm-1.5mm)*5mm
3). Industrial furnace ribbon:
Thickness: 1.5mm-3.0mm
Width: 10mm-30mm
| The allowable tolerance of alloy strip GB/T1234-2012 |
|
| Category |
Thickness ( mm ) |
Tolerance ( mm) |
|
| Common precision |
High precision |
|
| Cold-rolled strip |
0.05 ~ 0.1 |
±0.01 |
±0.005 |
|
| 0.1 ~ 0.2 |
±0.015 |
±0.01 |
|
| 0.2 ~ 0.5 |
±0.02 |
±0.015 |
|
| 0.5 ~ 1.0 |
±0.03 |
±0.025 |
|
| 1.0 ~ 1.8 |
±0.04 |
±0.03 |
|
| 1.8 ~ 2.5 |
±0.05 |
±0.04 |
|
| 2.5 ~ 4.0 |
±0.06 |
±0.05 |
|
| Hot-rolled Strip |
2.5 ~ 5.0 |
±0.25 |
±0.2 |
|
| 5.0 ~ 7.0 |
±0.3 |
±0.25 |
|
| 7.0 ~ 10.0 |
±0.4 |
±0.35 |
|
| 10.0 ~ 20.0 |
±0.5 |
±0.45 |
|
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| The allowable tolerance of alloy strip GB/T1234-2012 |
| Category |
Width ( mm ) |
Tolerance ( mm ) |
| side cut |
Nonside cut |
| Common precision |
High precision |
| Cold-rolled Strip |
5.0 ~ 10.0 |
±0.2 |
±0.1 |
-0.6 |
| 10.0 ~ 20.0 |
-0.8 |
| 20.0 ~ 30.0 |
-1 |
| 30.0 ~ 50.0 |
±0.3 |
±0.15 |
-1.2 |
| 50.0 ~ 100.0 |
±1.0 |
| 100.0 ~ 200.0 |
±0.5 |
±0.25 |
±1.5 |
| 200.0 ~ 300.0 |
±1.8 |
| Hot-rolled Strip |
15.0 ~ 60.0 |
/ |
±1.5 |
| 60.0 ~ 200.0 |
±2.5 |
| 200.0 ~ 300.0 |
±3.0 |
| Properties/Grade |
0Cr21Al6Nb |
| Main Chemical composition(%) |
Cr |
21.0-23.0 |
| Al |
5.0-7.0 |
| Fe |
Balance |
| Re |
opportune |
| |
Nb: 0.5 |
| Max. continuous service temp. of element |
1350 |
| Resistivity at 20oC (μ Ω @ m) |
1.45+-0.07 |
| Density (g/cm3) |
7.1 |
| Thermal conductivity(KJ/m@ h@ oC) |
46.1 |
| Coefficient of lines expansion(α × 10-6/oC) |
16 |
| Melting point (approx. )( oC) |
1510 |
| Elongation at rupture (%) |
≥ 12 |
| Micrographic structure |
Ferrite |
| Magnetic properties |
magnetic |
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