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 acid and ammonia systems.

Main Products:

Sheet,Plate,Bar,Wire

Applications:

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

Valves, pumps, shafts, fittings, and fasteners

Industrial heat exchangers

Chlorinated solvents

Crude oil distillation towers

Chemical Composition:(%)

ASTM Specifications: