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          • 800-HPALLOY
          • 1985 E 500 N Windfall, IN 46076
            444 Wilson St Tipton, IN 46072
            Post Office Box 40 Tipton, IN 46072
            tel:8004725569

          MONEL 400 (UNS N04400) Ni 66.5 Cu 31.5 Description

          Request a quote

          Ni 66.5 Cu 31 Fe 2.5 Mn 2.0 C 0.3 Si 0.5 S 0.024

          High Performance Alloys stocks and produces Monel 400 in this grade in the following forms: Bar, square bar, wire spool, wire cuts, loose coil, sheet/plate, tube, pipe, flange. Request quote on this grade.

           

          Overview

          Monel 400 is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions.
          Monel 400 is a nickel-copper alloy with excellent corrosion resistance in a wide variety of media. Monel 400 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 is widely used in the chemical, oil and marine industries.

           

          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 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.

          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 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.

           

          Chemistry

          Chemical Requirements

          Ni

          C

          Mn

          S

          Si

          Cu

          Fe

          Max

          0.3

          2.00

          0.024

          0.5

          34.0

          2.50

          Min

          63.0

          28.0


          Tensile Data

          Mechanical Property Requirements

          Ultimate Tensile

          Yield Strength (0.2% OS)

          Elong. in 2 in. or 50mm (or 4D), min.,%

          R/A

          Hardness

          Cold Worked/SR

          Min

          87 KSi

          60 KSi

          20B

          Max

          Min

          600 MPa

          415 MPa

          Max

          Hot Worked/SR

          Min

          80 KSi

          40 KSi

          30D

          Max

          Min

          552 MPa

          276 MPa

          Max

          B- not applicable to diameters or cross sections under 3/32 in (2.4mm).

          D-For hot-worked flats 5/16 in. (7.9mm) and under in thickness the elongation shall be 20% min.

          Specifications

          Form

          Standard

          Metal Type

          UNS N04400

          Bar

          ASTM B164 QQ-N-281 Din 17750

          Wire

          Sheet

          ASTM B127 QQ-N-281

          Plate

          ASTM B127 QQ-N-281

          Pipe
          ASTM B165
          Tube
          ASTM B165

          Fitting

           

          Forging

          ASTM B564

          Weld Wire

          FM 60/ ERNiCu-7/ 17753

          Weld Electrode
          FM 190 ENiCu-7

          Din

          2.4360


          Machining

           

          Machinability Ratings

          MACHINING DATA
          Carbide tools are suggested
          for rates better than 50% of Type 304.
          Machining Type Suggested starting rates are:
          Single Point turning : Roughing - 0.15" depth, 0.015"/rev feed -175 SFM
          Finishing - 0.025" depth, 0.007"/rev feed - 200 SFM
          Drilling : 1/4" Dia hole - 0.004"/rev feed - 60 SFM
          1/2" Dia hole - 0.007"/rev feed - 60 SFM
          3/4" Dia hole - 0.010"/rev feed - 60 SFM
          Reaming : Feed - same as drilling - 100 SFM
          Side and Slot Milling : Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM
          Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM
          These rates are for carbide tools,
          Type C-2 for roughing, drilling and reaming.
          Type C-3 for finishing.

           

          MONEL® is a registered trademark of the INCO family of companies.



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