Nickel Alloy 400 | Zhonghe

Nickel Alloy 400

MONEL® nickel-copper alloy 400 (UNS N04400/ W.Nr. 2.4360 and 2.4361) is a solid-solution alloy that can be hardened only by cold working. It has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments. The composition is shown in Table 1. Alloy 400 is widely used in many fields, especially marine and chemical processing. Typical applications are valves and pumps; pump and propeller shafts; marine fixtures and fasteners; electrical and electronic components; springs; chemical processing equipment; gasoline and freshwater tanks; crude petroleum stills, process vessels and piping; boiler feedwater heaters and other heat exchangers; and deaerating heaters.

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Nickel Alloy 400

Chemical Composition Limits
Weight % C S Ni+Co Fe Mn Si Cu
Nickel 400 0.30 max 0.024 max 63.0 max 2.50 max 2.0 max 0.50 max 28-34

Typical Mechanical Properties

Material Form and Condition Tensile Strength MPa Yield Strength (0.2% Offset) MPa Elongation (%) Hardness Rockwell B
Alloy 400 Annealed Rod and Bar 517-620 172-345 60-35 60-80
Alloy 400 Hot Rolled Plate Annealed 482-586 193-345 50-35 60-76
Alloy 400 Sheet Annealed 482-586 207-310 45-35 65-80
Alloy 400 Tube Cold drawn Annealed Seamless 482-586 172-310 50-35 75 max

CORROSION RESISTANCE

MONEL alloy 400 exhibits resistance to corrosion by many reducing media. It is also generally more resistant to attack by oxidizing media than higher copper alloys. This versatility makes alloy 400 suitable for service in a variety of environments. Alloy 400 is widely used in marine applications. While alloy 400 products exhibit very low corrosion rates in flowing seawater, stagnant conditions have been shown to induce crevice and pitting corrosion. Alloy 400 is also resistant to stress corrosion cracking and pitting in most fresh and industrial waters.

MONEL alloy 400 offers exceptional resistance to hydrofluoric acid in all concentrations up to the boiling point. It is perhaps the most resistant of all commonly used engineering alloys. Alloy 400 is also resistant to many forms of sulfuric and hydrochloric acids under reducing conditions.

AVAILABLE PRODUCTS AND SPECIFICATIONS

MONEL alloy 400 is designated as UNS N04400 and Werkstoff Nr. 2.4360 and 2.4361. It is listed in NACE MR01-75 for oil and gas service. Alloy 400 is furnished in a wide range of standard mill forms including pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. Popular forms and sizes are available from stock; many specialty products may be obtained from converters. MONEL alloy 400 is approved as a material of construction by the ASME Boiler and Pressure Vessel Code. Allowable stresses for Section III construction up to 800°F, Section VIII Division 1 construction up to 900°F and Section VIII Division 2 construction up to 800°F are contained in Tables 1B and 2B of ASME Section II, Part D.

Plate, Sheet, and Strip – BS3072NA13 (Sheet and Plate), BS3073NA13 (Strip), ASTM B 127, ASME SB 127 (Plate, Sheet, and Strip), SAE AMS 4544 (Sheet, Strip, and Plate), DIN 17750 (Plate, Strip and Sheet), QQ-N-281 (Plate, Sheet, Strip, Bar, Rod, Wire, and Forgings)

Bar, Rod, Wire, and Forgings – BS3075NA13 (Wire), BS3076NA13 (Bar), ASTM B 164 (Rod, Bar, and Wire), ASTM B 564 (Forgings), ASME SB 164 (Rod, Bar, and Wire), ASME SB 564 (Forgings), AECMA PrEN 2305 (Wire for Rivets), SAE AMS 4675 (Bars and Forgings), SAE AMS 4730 (Wire), SAE AMS 4731 (Wire and Ribbon), DIN 17752 (Rod and Bar), DIN 17753 (Wire), DIN 17754 (Forgings), VdTÜV 263 (Sheet, Plate, Bar, and Tubing), QQ-N-281 (Plate, Sheet, Strip, Bar, Rod, Wire, and Forgings)

Pipe and Tube – BS3074NA13 (Tube), ASTM B 163 (Condenser and Heat Exchanger Tube), ASTM B 165 (Seamless Pipe and Tube), ASTM B 725 (Welded Pipe), ASTM B 730 (Welded Tube), ASTM B 751 (Welded Tube), ASTM B 775 (Welded Pipe), ASTM B 829 (Seamless Pipe and Tube), ASME SB 163 (Condenser and Heat Exchanger Tubes), ASME SB 165 (Seamless Pipe and Tube), ASME SB 725 (Welded Pipe), ASME SB 730 (Welded Tube), ASME SB 751 (Seamless and Welded Tube), ASME SB 775 (Seamless and Welded Pipe), ASME SB 829 (Seamless Pipe and Tube), SAE AMS 4574 (Seamless Tubing), DIN 17751 (Pipe and Tube), VdTÜV 263 (Sheet, Plate, Bar, and Tubing),

Welding Products – MONEL Filler Metal 60-AWS A5.14/ERNiCu-7; MONEL Welding Electrode 190-AWS A5.11/ENiCu-7. Other Products – ASTM B 366, ASME SB 366 (Welded Fittings), SAE AMS 7233 (Rivets), DIN 17743 (Chemical Composition)

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