Salt Bath Nitriding of 420SS
Salt Bath Nitriding of 420SS
(OP)
Does the salt bath nitriding process have any similar effect on the corrosion resistance of 420 as it does to austenitics? Are there any other deleterious effects?
Someone with our company sent out some 420 parts to be QPQ'd that had already been hardened to 45-50Rc. Need some quick answers. The parts in question are shaft sleeves for hydraulic driven submersible water pumps that will be continuously wetted on the wet side of a lip seal and most likely used to sump fresh water with lots of entrained sand in coastal areas where there is a fairly high chloride content.
Thanks for any help you can give -John
Someone with our company sent out some 420 parts to be QPQ'd that had already been hardened to 45-50Rc. Need some quick answers. The parts in question are shaft sleeves for hydraulic driven submersible water pumps that will be continuously wetted on the wet side of a lip seal and most likely used to sump fresh water with lots of entrained sand in coastal areas where there is a fairly high chloride content.
Thanks for any help you can give -John





RE: Salt Bath Nitriding of 420SS
For pump shaft sleeves you can try 17-4 SS and the bore can have a ceramic coating. This gives a very good performance.
RE: Salt Bath Nitriding of 420SS
RE: Salt Bath Nitriding of 420SS
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: Salt Bath Nitriding of 420SS
Take a look at the brochures at this site.
http
RE: Salt Bath Nitriding of 420SS
420 does not have great corrosion resistance to start with and nitriding will make it worse.
I wouldn't count on this. You need to move to a better alloy.
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RE: Salt Bath Nitriding of 420SS
RE: Salt Bath Nitriding of 420SS
rmw
RE: Salt Bath Nitriding of 420SS