Monel 400

Monel 400 (UNS designation N04400) is a corrosion-resistant alloy with the largest dosage, the most wide range of uses, and excellent comprehensive properties. This alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas media, and also has excellent corrosion resistance against hot concentrated alkali liquid. It is also resistant to corrosion from neutral solutions, water, seawater, atmosphere, organic compounds, etc. An important feature of this alloy is that it generally does not produce stress corrosion cracking and has good cutting performance.

• 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

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.