Common trade names: Resistohm 135, Aluchrom Y.
FeCrAl 135 (Werkstoff Nr 1.4767) is a ferritic alloy of the FeCrAl family, which can be used as heating element of resistance up to 1250°C.This alloy has electrical resistance properties similar to those of the Nickel-Chromium alloys, making it suitable for electrical heating applications. Absence of nickel makes them cheaper than Nickel-Chromium alloys, but it also makes them more prone to corrosion. Care should be taken to operate these heating elements in dry conditions to minimize corrosion.
Chemical composition
| Iron Fe Bal. | Chromium Cr 18-22% | Aluminium Al 4.0-6.0% | Carbon C 0.1% |
Physical properties
| Density at Room°C |
Coeff of Linear Expansion b/w 20-1000°C 10-6/K |
Electrical Resistivity at 20°C |
Melting Point °C |
Max Continuous Operating Temperature in Air °C |
Magnetic Properties |
| 7.25 g/cm3 | 14.5 | 1.35 µΩ-cm | 1510 | 1250 | The material is Magnetic |
Mechanical properties
| Tensile Strength N/mm2 |
Yield Strength (daN/mm²) |
Hardness (HV) |
Elongation (A% on 100 mm) |
| 740-800 | 55 | 230 | 18-20 |
Product forms
| Product | Size (mm) | Condition of Supply |
| Wire | 0.2 – 12.0 | Bright Annealed Oxidized |
| Bar | 5.0 – 60.0 | Hot Finished Cold Finished Peeled Bright Turned Bright Annealed |
| Strip | Thickness 2.5 – 5.0 Width 20 – 100 |
Cold Finished Bright Annealed |
| Ribbon | Thickness 0.2 – 1.0 Width 2.0 – 4.5 |
Bright Annealed Flat Rolled |
| Stranded Wire | 2.5 – 3.0 | Hard Annealed |
Applications
FeCrAl 135 can be used as heating element of resistance up to 1250°C.This alloy must be used in a dry environment in order to avoid rust because this is not a stainless alloy. Elements realised in FeCrAl 135 have an excellent life time in a sulphurous environment, and particularly when atmosphere is also oxidizing. A preoxidation (2 hours at more than 1000°C out in the open air) is necessary when FeCrAl 135 must operate in a reducing atmosphere.The white-grey aluminium coat formed during the oxidation heat treatment preserves the wire or the ribbon of the future chemical attacks.
- Top cookers with ceramics
- Pottery furnaces elements, and tubular elements.
- Production of car cigarette lighters.
- Fuel burners elements.