Monel R405 | Nickel Alloy R405 | N04405

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Monel R405 | Nickel Alloy R405 | N04405  Nickel Alloy

We are the Leading Supplier of Monel R405 / Nickel Alloy R405. 
MONEL R405 is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. 

We supply and export to Singapore , Indonesia , Brunei and other ASEAN Countries.  
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E Steel supply Monel R405 (Nickel Alloy R-405) Round Bars / Rods / Shafts , Monel R-405 (Nickel Alloy R405) Plates.  

Monel R-405 Suppliers - Nickel Alloy R405 , UNS N04405

MONEL R405 is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions.  This Nickel Alloy Material is a free-machining version of Monel 400. It is added with sulfur to improve its machinability.  

MONEL r405 is a nickel-copper alloy with excellent corrosion resistance in a wide variety of media.

Material r-405 is characterized by good general corrosion resistance and moderate to high strength. It has excellent resistance to rapidly flowing brackish water or seawater. This material is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. Nickel Alloy R405 is slightly magnetic at room temperature. Monel R405 Alloy is widely used in the chemical, oil and marine industries.


Characteristics of Monel R405 

  • Corrosion resistance in an extensive range of marine and chemical environments. From pure water to nonoxidizing mineral acids, salts and alkalis.
  • MONEL R405 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 480C.
  • Good resistance to 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 corrosive 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.

*Due to sulfur addition for free machining, welding is not possible for MONEL R405.

Chemical Requirements of Nickel Alloy R405  

  Ni Cu Fe S Mn C Si
Max   34.0 2.5 0.060 2.0 0.3 0.5
Min 63.0 28.0   0.025


Mechanical Properties of Monel R-405 

Mechanical Property Requirements
  Ultimate Tensile Yield Strength (0.2% OS) Elong. in 50mm (or 4D) min. % R/A Hardness
Cold Worked/SR
Min 85 KSi 50 KSi 15    
Min 585 MPa 345 KPa      
Hot Worked/SR
Min 75 KSi 35 KSi 30    
Min 517 MPa 241 MPa      

Similar Specifications and Standards of Nickel Alloy N04405 

Other designations that are equivalent to Monel R-405 / Nickel Alloy 405 include:

  • AMS 4674
  • ASTM F467
  • ASTM F468
  • QQ N281

Fabrication and Heat treatment of Monel Alloy R405 


Monel(r) R-405 has good machinability.


Monel(r) R-405 has excellent formability.


Monel(r) R-405 can be welded using standard welding techniques.

Heat Treatment

Monel(r) R-405 does not react to heat treatment.


Forging of Monel(r) R-405 is not recommended due to the presence of the intentional sulfur content.

Hot Working

Monel(r) R-405 should not be hot worked.

Cold Working

Monel(r) R-405 can be easily cold worked.


Monel(r) R-405 is annealed at 927°C (1700°F) followed by air cooling.


Monel(r) R-405 can be hardened only by cold working.

Applications of Monel R405 

Monel r-405 can be used for several applications as below : 
  • 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 for 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.

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