201 stainless steel

[faulkma]

I'm trying to find a comparison between 316 or 316L SST versus 201 stainless steel. I'm interested in the corrosive properties comparison. Can someone point me in the right direction?

 

[gr2vessels]

Faulkma,
refer to thread330-182589 of 28.03.2007 on the Metal and Metallurgy forum. You'll get all the answers there.
cheers,
gr2vessels

 

[strider6]

"DIFFERENCES BETWEEN 200-SERIES AND
300-SERIES STAINLESS STEELS
The differences between these two series of stainless steels may be summarized as follows: Corrosion resistance In all of these stainless steels, Cr is trying to form ferrite while the austenitising elements, Ni, N, Mn and Cu, are trying to
form austenite. The higher the Cr content, the more austenitising elements are needed to change all the ferrite to austenite. J4 is a good example – in order to get the Ni level down to 1% Ni, and so minimize the price, it has been necessary to reduce the Cr content to 15-16%. This is much lower than the 18.0 – 20.0% Cr specified for grade 304 and itis Cr which makes the greatest contribution towards corrosion resistance. This means that such 200-series grades have lower corrosion resistance and are suitable for a much narrower range of applications than grade 304. This has
not been well understood and there are many instances where 200-series grades have failed due to corrosion, such as when they have been used for components like handrails in exterior applications"

http://www.assda.asn.au/index.php?option=com_content&task=view&id=63&Itemid=89

http://www.assda.asn.au/images/stories/oldcontent/19673001161232771640.pdf

S

Corrosion Protection & Corrosion Control

 

[EdStainless]

There used to be a 200 series analog to 316, the only two that come to mind are S20910 and S21603. Without the Mo you will not come close to the corrosion resistance of 316.

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