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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:(%)
| C | Mn | S | Si | Ni | Cu | Fe |
|---|---|---|---|---|---|---|
| 30 max | 2.00 max | 0.024 max | 0.50 max | 63.0 min | 28.0-34.0 | 2.50 max |
ASTM Specifications:
| Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet/Plate | Bar | Forging | Fitting | Wire |
|---|---|---|---|---|---|---|---|---|
| B165 | B725 | B163 | B127 | B164 | B564 | B366 |