Monel 400

Update : 2026-02-25

Monel 400
Monel 400 is a nickel-copper alloy with excellent corrosion resistance in a wide range of media, including seawater, hydrofluoric acid, sulfuric acid, and alkaline solutions. It exhibits good mechanical properties from low temperatures up to elevated temperatures, along with high ductility and excellent weldability. It is highly resistant to stress corrosion cracking in chloride environments and shows good resistance to erosion-corrosion. Widely used in marine, chemical, and oil and gas industries, it provides reliable performance in both corrosive and high-temperature applications.
Equivalent Grade

UNS: N04400

W.Nr.: 2.4360

Chinese Standard: NS3101

Standard

● Sheet/Plate: ASTM B127

Seamless Pipe: ASTM B163

Bar: ASTM B164

Alloy TypeNickel-Copper Alloy (Corrosion and Wear Resistant Type, Chromium-Free)
StandardSheet, Bar, Pipe, Tube, Fittings, Flange, Welding Materials, Forgings, Wire, Castings
Key Properties

● Excellent corrosion resistance, especially resistant to seawater, salt solutions and neutral/alkaline media

Outstanding resistance to hydrofluoric acid and fluoride corrosion, no stress corrosion cracking tendency

Excellent mechanical properties, high strength, good toughness, good hot and cold forming performance

Good weldability, no heat treatment required after welding, excellent wear resistance

Applicable EnvironmentOffshore engineering environment, seawater desalination scenarios, fluorine chemical scenarios, oil and gas extraction (containing acidic media), chemical strong corrosion environment, shipbuilding
Typical ApplicationsSeawater Desalination Equipment, Ship Components, Fluorine Chemical Reactors, Oil And Gas Pipelines, Valve Fittings, Chemical Corrosion-Resistant Vessels, Submarine Cable Sheaths, etc.


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