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High Performance Alloys stocks and produces Monel in this grade in the following forms: Request quote on this grade. Monel is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Monel is a nickel-copper alloy with excellent corrosion resistance in a wide variety of media. Monel is characterized by good general corrosion resistance, good weldability and moderate to high strength.

The alloy has been used in a variety of applications. It has excellent resistance to rapidly flowing brackish water or seawater.

It is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. The alloy is slightly magnetic at room temperature.


MONEL 400 (UNS N04400) Ni 66.5 Cu 31.5 Description

Monel is widely used in the chemical, oil and marine industries. Overview Monel is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Characteristics Corrosion resistance in an extensive range of marine and chemical environments. From pure water to nonoxidizing mineral acids, salts and alkalis. This alloy is more resistant to nickel under reducing conditions and more resistant than copper under oxidizing conditions, it does show however better resistance to reducing media than oxidizing.

Good mechanical properties from subzero temperatures up to about C. Good resistance asgm sulfuric and hydrofluoric acids.

Aeration however will result in increased corrosion rates. May be used to handle hydrochloric acid, but the presence of oxidizing salts will greatly accelerate adtm attack. Resistance to neutral, alkaline and acid salts is shown, but poor resistance is found with oxidizing acid salts such as ferric chloride. Excellent resistance to chloride ion stress corrosion cracking.

ASTM B – 93 Standard Specification for Nickel-Copper Alloy (UNS N)* Seamless Pipe and Tube

Applications Feed water and steam generator tubing. Brine heaters, sea water scrubbers in tanker inert gas systems. Sulfuric acid and hydrofluoric acid alkylation plants. Pickling bat heating coils. Heat exchangers in a variety of industries.


Transfer piping from oil refinery crude columns. Plant awtm the refining of uranium and isotope separation in the production of nuclear fuel. Pumps and valves used in the manufacture of perchlorethylene, chlorinated plastics.

Monoethanolamine MEA reboiling tube. Cladding for the upper areas of oil refinery crude columns. Propeller and pump shafts. Machining Type Suggested starting rates are: Type C-3 for finishing. Reproduction of this site in whole or part is prohibited astmm the expressed permission of High Performance Alloys, Inc. Please give us a Review. These rates are for carbide tools, Type C-2 for roughing, drilling and reaming.