FeCrAl alloy is very common in electric heating field.

Because it has many advantages, of course it also has disadvantages,let study it.

Advantages:

1,The use temperature in the atmosphere is high.

The maximum service temperature of HRE alloy in iron-chromium-aluminum electrothermal alloy can reach 1400℃, while that of Cr20Ni80 alloy in nickel-chromium electrothermal alloy can reach 1200℃.

2,Long service life

Under the same high service temperature in the atmosphere, the life of Fe-Cr-Al element can be 2-4 times longer than that of Ni-Cr element.

3,High surface load

Because Fe-Cr-Al alloy allows high service temperature and long service life, the component surface load can be higher, which not only makes the temperature rise faster, but also saves alloy materials.

4,Good oxidation resistance

The Al2O3 oxide film structure formed on the surface of Fe-Cr-Al alloy is compact, has good adhesion with the substrate, and is not easy to cause pollution due to scattering. In addition, Al2O3 has high resistivity and melting point, which determines that Al2O3 oxide film has excellent oxidation resistance. The carburizing resistance is also better than Cr2O3 formed on the surface of Ni-Cr alloy.

5,Small specific gravity

The specific gravity of Fe-Cr-Al alloy is smaller than that of Ni-Cr alloy, which means that it is more economical to use Fe-Cr-Al alloy than Ni-Cr alloy when making the same components.

6,High resistivity

The resistivity of Fe-Cr-Al alloy is higher than that of Ni-Cr alloy, so larger alloy materials can be selected when designing components, which is beneficial to prolong the service life of components, especially for fine alloy wires. When materials with the same specifications are selected, the higher the resistivity, the more material will be saved, and the smaller the position of components in the furnace will be. In addition, the resistivity of Fe-Cr-Al alloy is less affected by cold working and heat treatment than that of Ni-Cr alloy.

7,Good sulfur resistance

Iron, chromium and aluminum have good corrosion resistance to sulfur-containing atmosphere and when the surface is polluted by sulfur-containing substances, while nickel and chromium will be seriously eroded.

8,Cheap price

Iron-chromium-aluminum is much cheaper than nickel-chromium because it does not contain scarce nickel.

Disadvantages:

1,Low strength at high temperature

Its plasticity increases with the increase of temperature. When the temperature is above 1000℃, the material will slowly stretch due to its own weight, which will cause the deformation of the element.

2,Easy to get big brittleness

After being used at high temperature for a long time and cooled in the furnace, it becomes brittle as the grain grows, and it cannot be bent in cold state.

3, Magnetic

Fecral alloy will be non-magnetic over 600°C.

4, Corrosion resistance is weaker than nicr alloy.

If you have more information, welcome to discuss with us.

We can produce about 200 tons fecral alloy products, if you need, please feel free to contact us.