What is Ferrite in Austenitic Stainless Steel?

Ferrite is a type of austenitic stainless steel. It contains high levels of chromium and carbon, which makes it resistant to corrosion. The word “ferrite” comes from the Latin word for iron (Ferrum). Austenitic steels are non-magnetic, but ferritic steels are slightly magnetic.

What does ferrite do in steel?

Ferrite is important in welding because it helps to prevent weld cracking. When austenitic steels are welded, the heat of the welding process can cause chromium and carbon to combine and form chromium carbides. These carbides are hard and brittle, and they can cause the weld to crack.

The ferrite in austenitic stainless steel helps to prevent weld cracking by absorbing chromium and carbon from the welding process. This allows the weld to remain strong and ductile.

Does stainless steel contain ferrite?

Most austenitic stainless steels contain around 10-20% ferrite. The exact amount of ferrite depends on the composition of the steel. For example, steels that contain high levels of chromium and molybdenum will have more ferrite than steels with lower levels of these elements.

What is ferritic and austenitic?

Ferritic stainless steels are magnetic, while austenitic stainless steels are non-magnetic. This is because the microstructure of ferritic steels contains more iron than austenitic steels. The extra iron makes the ferritic steel magnetic.

Related Links

Ferrite Content in Austenitic Stainless Steels – Rolled Alloys, Inc.
Stainless Foundry
Welding of Austenitic Stainless Steel – TWI
Ferrite number control in Austenitic Stainless Steel Welding | Welpedia
Delta Ferrite Formation in Austenitic Stainless Steel Castings

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