AISI ASTM Cold Rolled Stainless Steel Coil 316L 201 2b Finish

AISI ASTM Cold Rolled Stainless Steel Coil 316L 201 2b Finish

What is a 2b finish on stainless steel?

Let’s start with basic protection—which applies itself organically. All stainless steels are iron-based alloys containing at least 10.5% chromium. A reaction between that chromium and the oxygen in the atmosphere produces a chromium oxide film at the surface. This allows the film to immediately self-repair in the presence of oxygen in the event of any surface damage.

The next layer comes at the mill. Whether we are talking hot rolled or cold rolled, all stainless steel flat products are treated with a standard mill finish. Let’s review two of the more common mill finishes:

• 2B: This is achieved by cold rolling, heat treating and pickling, along with the application of a light rolling at the end in order to achieve a smooth and reflective sheen. Considered the most widely used surface finish, 2B is the basis for most polished and brushed finishes. Such common stainless steel grades as 201, 304, 304L and 316L come in a standard 2B finish.

 
 

 

 

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