420F stainless steel 1

[Chappy2]

Does anyone out there have any experience with 420F?
What are its advantages over 300 series stainless?
I understand that there aren't many mills state-side that will produce it

 

[kenvlach]

Properties and selection of stainless steel alloys for machining are discussed at

http://www.ssina.com/view_a_file/machining.pdf

Information on 420F is summarized on the final page. Re 420F vs. 300 series. 420F is much better in machinability, cheaper (no Ni & lower Cr), but much poorer w.r.t. corrosion. 420F is probably worse in corrosion resistance than about all other SS except for 420FSe, 440C & 440CF.

For SI units, see the table "Mechanical Properties of Wrought Stainless Steels" at

http://www.assda.asn.au/asp/index.asp?pgid=17971

For more info, Google on 420F stainless steel properties.