Alloy 400, UNS NO4400
Alloy 400 is a solid-solution binary. As nickel and copper are mutually soluble in all proportions. It is a single-phase alloy. It has a face-centered cubic lattice structure with a lattice parameter of 3.534 A.
Alloy 400, with an excellent combination property, is a corrosion resistent alloy in a wide range of use and applications. It has an excellent corrosion resistance in the media of hydrofluoric acid and fluorine and also a good corrosion resistance to hot strong alkali liquor. Besides it also resistant to corrosion in the neutral solution, water, sea water, air, organic compound etc..One important character of the alloy is that the stress corrosion cracking normally doesn't occur and it has a good machinability.
Alloy 400 exhibits resistance to corrosion by many reducing media. It is also generally to attack by oxidizing media than higher copper alloys. This versatility makes alloy 400 suitable for service in a variety of environment;
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 a also resistant to stress corrosion cracking and pitting in most fresh and industrial water;
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.
Monel 400 is a material in a variety of applications, and is applied in many industrial areas.tubing
1. Feed-water and steam generator in power plants;
2. Brine heaters and evaporator bodies in seawater desalination plants;
3. Pumps and values used in the manufacture of chlorinated hydrocarbons;
4. Cladding for crude oil distillation columns;
5. Splash-zone sheathing in offshore structures;
6. Plants for uranium refining and isotope separation in the production of nuclear fuel;
7.Propeller and pump shafts for seawater service.