Nickel-copper Alloy 400

MONEL nickel-copper alloy 400 (UNS N04400) 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.

Chemical Composition

 Mechanical Properties

Physical Properties

Standard

 Rod, Bar, Wire and Forging Stock：ASTM B 164 (Rod, Bar, and Wire),ASTM B 564 (Forgings)
Plate, Sheet and Strip：ASTM B 127, ASME SB 127
Pipe & 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)
Welding Products：Filler Metal 60-AWS A5.14/ERNiCu-7;Welding Electrode 190-AWS A5.11/ENiCu-7.

Characteristics of Monel 400

● 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