Monel 400 | ASTM B 164 | QQ N 281 | DIN 17752 | ISO 15156 | BS3072NA13 | AMS 4544 | W.Nr 2.4360 | UNS N04400 | NACE MR-01-75

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

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

Machining

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.

Specifications

Bar         –  ASTM B 164, QQ N 281, DIN 17752, AMS 4675
Sheet     –  ASTM B 127, QQ N 281, BS3072NA13, AMS 4544, DIN 17750
Plate      –  ASTM B 127, QQN 281, BS3072NA13, AMS 4544, DIN 17750
Strip      –  BS3073NA13, ASTM B127, AMS 4544, DIN 17750
Pipe       –  ASTM B 185
Tube      –  ASTM B165, AMS 4574, AMS 4575
Forging –  ASTM B564, DIN 17752, AMS 4675
Others   –  W.Nr 2.4360, UNS N04400, NACE MR-01-75, Wire AMS 4730 Monel 400 (tradename), ISO 15156

 

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