monel-400

GRADE Monel 400, Alloy 400, Nickel 400, Nickelvac 400, Nicorros 400, UNS N04400,ASTM/ASME B127

Monel Alloy 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 feed water heaters and other heat exchangers; and deaerating heaters.

Alloy 400 has outstanding resistance to neutral and alkaline salts. It has been a standard material for salt plants for many years. This alloy is one of the few metallic materials which can be used in contact with fluorine, hydrofluoric acid, hydrogen fluoride or their derivatives.

Specification

GRADE Monel 400, Alloy 400, Nickel 400, Nickelvac 400, Nicorros 400, UNS N04400,ASTM/ASME B127


Characteristics

  • Corrosion resistance in a wide range of marine and chemical environments
  • Freedom from chloride induced stress-corrosion cracking
  • Good mechanical properties from sub-zero temperatures up to about 550°C (1020°F)
  • Approval for pressure vessels with wall temperatures from -10-425°C (14-800°F) according to VdTÜV-Wbl.263 and up to 900°F (480°C) according to ASME boiler and pressure vessel code
  • Good workability and weldability

 

Chemical Composition

 

Alloy 400
Ni
Fe
C
Mn
Si
Cu
Al
S
Min
63
1
-
-
-
28
-
-
Max
-
2.5
0.15
1.25
0.5
34
0.5
0.02


Mechanical Properties

Typical room temperature Tensile Properties of Annealed Material

Product Form
Condition
Tensile (ksi)
.2% Yield (ksi)
Elongation (%)
Hardness (HRB)
Plate
Annealed
70-85
28-50
50-35
60-76
Sheet
Annealed
70-85
30-45
45-35
65-80

*Alloy 400 is slightly magnetic at room temperature.


Applications

  • Feed-water and steam generator tubing in power plants
  • Brine heaters and evaporator bodies in salt plants
  • Sulphuric and hydrofluoric acid alkylation plants
  • Industrial heat exchangers
  • Cladding for crude oil distillation columns
  • Splash-zone sheathing in offshore structures
  • Propeller and pump shafts for seawater service
  • Plants for uranium refining and isotope separation in the production of nuclear fuel pumps and valves used in the manufacture of chlorinated hydrocarbons
  • Monoethanolamine (MEA) reboiler tubes

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