Monel 400 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 a cid and ammonia
systems. Monel 400 has great mechanical properties at subzero
temperatures, can be used in temperatures up to 1000° F, and its
melting point is 2370-2460° F. However, alloy 400 is low in
strength in the annealed condition so, a variety of tempers may be
used to increase the strength.
Features:
* Resistant to seawater and steam at high temperatures
* Excellent resistance to rapidly flowing brackish water or
seawater
* Excellent resistance to stress corrosion cracking in most
freshwaters
* Particularly resistant to hydrochloric and hydrofluoric acids
when they are de-aerated
* Offers some resistance to hydrochloric and sulfuric acids at
modest temperatures and concentrations, but is seldom the material
of choice for these acids
* Excellent resistance to neutral and alkaline salt
* Resistance to chloride induced stress corrosion cracking
* Good mechanical properties from sub-zero temperatures up to 1020°
F
* High resistance to alkalis
Applications:
* Valves, pumps, shafts, fittings, and fasteners
* Industrial heat exchangers
* Chlorinated solvents
* Crude oil distillation towers
* Marine engineering
* Chemical and hydrocarbon processing equipment
* Gasoline and freshwater tanks
* Crude petroleum stills
* De-aerating heaters
* Boiler feed water heaters and other heat exchangers
Monel 400 International Brand |
| USA | GE | UK | FR |
| UNS | SEW VDIUV | BS | AFNOR |
Monel 400 | N04400 | W.Nr.2.4360 NiCu30Fe | NA 12 | Nu 30 |
|
| Tensile Strength (Rm N/mm2) | Yield strength (RP0.2N/mm2) | | |
| | | | |