Monel 401- galvanic compatibility
Monel 401- galvanic compatibility
(OP)
We are in need of a stainless alloy to use for building components in contact with Monel. Our particular Monel alloy has been tested to have 50.5% Copper & 49.5% Nickel, and is therefore closest to Monel 401. I have not been able to find this on any galvanic chart. What stainless alloy can we use (in atmospheric conditions) for fasteners and replacement components to minimize corrosion with the existing Monel? Thanks.





RE: Monel 401- galvanic compatibility
RE: Monel 401- galvanic compatibility
RE: Monel 401- galvanic compatibility
Even though the hardware is concealed I would suggest that you only use HIGH alloy materials. If you want to use stainless, look at the 6%Mo alloys such as AL-6XN or 254SMO. I would discurage the use of 304 or 316.
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Monel 401- galvanic compatibility
RE: Monel 401- galvanic compatibility
One is that you don't know what kind of impurities/corrosives are going to collect over the years. The tendancy for 3XX alloys to pit and stress crack do not bode well for long term usage.
You can't assure that they will remain passive. That is the catch.
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Monel 401- galvanic compatibility
For galvanic compatibility, see MIL-STD-889B, available at http://assist1.daps.dla.mil/quicksearch/
From Table I in Notice 3:
High-copper bronzes, category āNā are compatible with category āO,ā high-nickel copper alloys such as Monel for both industrial and marine atmospheres (although not seawater immersion).
A Galvanic Table listing metals in the order of their relative activity in seawater at http://www
The Copper Development Association at www.copper.org has a lot of searchable information. E.g.,
MATERIALS SELECTION FOR HIGH RELIABILITY COPPER ALLOY SEAWATER SYSTEMS [includes Cu-Ni alloys] http://w
Aluminum Bronze Alloys - Corrosion Resistance Guide, Publication No 80, 26 pages of invaluable data on recommended service environments.
http
Copper & Copper Alloy Corrosion Resistance Database
http://protection.copper.org/
Corrosion Resistance of Copper and Copper Alloys (Large Table), CDA No 106
http://www.cda.org.uk/Megab2/corr_rs/corrosio.htm
Collation of Data Comparing Properties of Aluminum Bronze with Cast Stainless Steels and Ni-Resist in Offshore Sea Water Environments
http:
RE: Monel 401- galvanic compatibility
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm