Materials

MONEL® 400 2.4360 – UNS N04400 – NiCu30Fe

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. 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 fresh water tanks; crude petroleum stills, process vessels and piping; boiler feedwater heaters and other heat exchangers; and deaerating heaters.

Products

MONEL® 400
Availability
seamless-pipe Seamless Tubes

 stock
welded-pipe Welded Tubes  stock
plate Plates  stock
bar Bars  stock
flanges Flanges  stock
accessories Fittings  stock

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

General characteristics

  • 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 the material 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

Technical information

Specifications

 

Alloy 400 – UNS N04400
Products Norm ASTM
Seamless Tubes B-163
Welded Tubes B-725
Plates B-127
Bars B-164
Flanges B-564
Fittings B-366

Chemical specifications %

 

Alloy 400 – UNS N04400
Element Simbol Maximum
Carbon C 0,30
Manganese Mn 2,0
Sulfur S 0,024
Silicon Si 0,50
Nickel Ni Min. 63,0
Copper Cu 28,0-34,0
Iron Fe 2,50

Mechanical Properties

Alloy 400 – UNS N04400
Norm Rm min. Rp 0,2% min. E4d min.% Z min.% T.I.(J) HR B HB
B-127 a.1 70 (485) 28 (195) 35
a.2 75 (515) 40 (275) 25
b.1 70 (485) 28 (195) 35
c.1 70-85 (485-585) 28 (195) 35
c.2 73-83
c.3 82-90
c.4 100 (690) 90 (620) 2
B-163 1 70 (483) 28 (193) 35
6 85 (586) 55 (379) 15 B75 max.
B-164 A.#1 110 (760) 85 (585) 8 (*)
A.#4 85 (585) 55 (380) 10 (*)
B.#1 84 (580) 50 (345) 10 (*)
B.#2 87 (600) 60 (415) 20
B.#3 84 (580) 55 (380) 20
B.#5 84 (580) 50 (345) 20 (*)(**)
B.#6 80 (552) 50 (345) 20
C.#7 80 (552) 40 (276) 30 (***)
C.#8 75 (517) 40( 276) 30
C.#9 75 (517) 30 (207) 25
C.#10 B75 a B95
D.#11 70 (480) 25 (170) 35
D.#10 B60 a B75
B-564 70 (483) 25 (172) 35
B-725 1 70 (480) 25-28 (170-195) 35
6 85 (585) 55 (380) 15

a = Hot-Rolled Plate

b = Hot-Rolled Sheet

c = Cold-Rolled Sheet

1 = Condition: Annealed

2 = Condition: As-rolled plate may be given a stress-relieving heat treatment subsequent to final rolling. As-rolled plate specified “suitable for hot forming” shall be furnished from heats of known good hot-malleability characteristics (see X1.2.2). There are no applicable
tensile or hardness requirements for such material.
3 = Condition: Quarter-hard

4 = Condition: Half-hard

5 = Condition: Hard

6 = Condition: Stress-relieved

A = Cold-worked (as worked)
B = Cold-worked (stress-relieved)
C = Hot-worked (as worked or stress-relieved)
D = Hot-worked (annealed) or cold-worked (annealed)
#1 = Rounds under 1⁄2 (12.7)
#2 = Rounds, 1⁄2 to 31⁄2 (12.7 to 88.9), incl
#3 = Rounds, over 31⁄2 to 4 (88.9 to 101.6), incl
#4 = Squares, hexagons, and rectangles under 1⁄2 (12.7)
#5 = Squares, hexagons and rectangles, 2 (50.8) and under
#6 = Squares, hexagons and rectangles, over 2 (50.8) to
31⁄8 (79.4), incl
#7 = Rounds, squares, and rectangles up to 12 (305),
incl, and hexagons 21⁄8 (54) and under
#8 = Rounds, squares, and rectangles over 12 (305) to 14
(356), incl
#9 = Hexagons over 21⁄8 (54) to 4 (102), incl
#10 = Rings and disks
#11 = Rod and bar, all sizes
(*) Not applicable to diameters or cross sections under 3⁄32 in. (2.4 mm).
(**) For sections under 1⁄2 in. (12.7 mm), the elongation shall be 10 % min.
(***) For hot-worked flats 5⁄16 in. (7.9 mm) and under in thickness the elongation shall be 20 % min.