Monel 400 material is a nickel-copper alloy (about 67% Ni – 23%
Cu) that is resistant to sea water and steam at high temperatures as
well as to salt and caustic solutions. Alloy 400 is a solid solution
alloy that can only be hardened by cold working. This nickel alloy
exhibits characteristics like good corrosion resistance, good
weldability and high strength. A low corrosion rate in rapidly flowing
brackish or seawater combined with excellent resistance to
stress-corrosion cracking in most freshwaters, and its resistance to a
variety of corrosive conditions led to its wide use in marine
applications and other non-oxidizing chloride solutions. This nickel
alloy is particularly resistant to hydrochloric and hydrofluoric acids
when they are de-aerated. As would be expected from its high copper
content, alloy 400 is rapidly attacked by nitric acid and ammonia
systems.
C | Mn | S | Si | Ni | Cu | Fe |
---|---|---|---|---|---|---|
.30 max | 2.00 max | .024 max | .50 max | 63.0 min | 28.0-34.0 | 2.50 max |
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