Ferritic Types of Stainless Steel Basics - 409 - 430 - 430F - 430F Se

It's Michael with Michael Talks Metal and we’re back for the 140th time and our topic today is the basics of the ferritic types of stainless steels.
Full transcript: www.michlinmetals.com/ferriti...
When enough Chromium is added to iron it creates a stainless steel. If no other alloying element is added, its metallurgical structure is "ferritic" at all temperatures it would encounter in fabrication and use. Ferritic types are magnetic at temperatures below the Curie point and are used in some applications where magnetic properties come into play.
Very simply, the amount of Chromium determines the degree of general corrosion resistance. More Chromium is more corrosion and oxidation resistant, but would also be more costly. As Chromium increases, ductility and toughness decrease, particularly at low temperature. For these reasons, applications specify the lowest Chromium containing alloy with adequate performance. Ferritic grades are relatively low strength among the stainless steels and are not as easily welded or formed as the Austenitic types.
Some examples help illustrate the kinds of applications where the Ferritic types are most commonly found.

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