Project Description

Monel R-405 (UNS N04405 )

The free-machining version of Monel 400. A controlled amount of sulfur is added to the alloy to provide sulfide inclusions that act as chip breakers during machining. A Ni-Cu alloy with high strength and excellent resistance to a range of media including seawater, hydrofluoric and sulfuric acids, and alkalies. Used in marine and offshore engineering, chemical andhydrocarbon processing equipement, valves, pumps, shafts, fittings, fasteners, and heat exchangers.

Equivalent Grades

TrademarksGBJISKSASTMUNSDINW.NrGOSTBSNF
Monel R-405MCu-28-1.5-1.8Monel R-405N04405NiCu30Fe2.4360
2.4361
НМЖМц28-2.5-1.5Ni68Cu28Fe
NA12
Nu 30

Product Forms

Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings

Chemical Composition,%

CPSMnSiNiCuFe
≤0.30≤0.030.025~0.060≤2.00≤0.50≥63.0028.00~34.00≤2.50

Typical Physical & Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaElongation,%
8.801300-135055024040

Specifications

Rod, Bar, Wire, ForgingsASTM B164/ASME SB164, DIN 17752-17754
Plate, Sheet, StripASTM B127/ASME SB127, DIN 17750
Pipe, TubeASTM B163/ASME SB163, ASTM B725/ASME SB725, ASTM B775/ASME SB775, ASTM B751/ASME SB751, DIN17751
OthersASTM B366/ASME SB366(Fittings), DIN 17743

Features

  • 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 thematerial 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

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