What is Monel 502 Polished Pipe - Knowledge

Alloy Composition

Monel 502 is a nickel - copper alloy. It contains 63% - 70% nickel, 2.5% - 3.5% aluminum, up to 2% iron, up to 1.5% manganese, up to 0.5% titanium, up to 0.5% silicon, up to 0.1% carbon, up to 0.01% sulfur, and the remainder is copper.

Properties

Excellent Corrosion Resistance: Monel 502 polished pipe shows good corrosion resistance in various corrosive media. It has excellent resistance to fluorine, hydrochloric acid, sulfuric acid, hydrofluoric acid, and their derivatives. It is more corrosion - resistant than copper - based alloys in seawater. It can resist the corrosion of sulfuric acid with a concentration of less than 85% and is one of the few important materials in hydrofluoric acid. It also has good resistance to water corrosion, high - temperature corrosion, and ammonia corrosion.

High Mechanical Strength

: The pipe has a high tensile strength of 1158 MPa and a yield strength of 1034 MPa. It also has good elongation and reduction of area, with values of 15% and 53% respectively, which means it has good ductility while maintaining high strength. In addition, its elastic modulus is 190 - 210 GPa, which shows good rigidity.

Good Machinability and Weldability: Monel 502 alloy has similar machinability to austenitic stainless steel and can be formed by conventional methods. It also has good weldability and can be welded by conventional methods.

Surface Polishing

The polished surface of the pipe not only improves its appearance but also has practical benefits. It can reduce the roughness of the pipe inner wall, which is beneficial to the smooth flow of the medium in the pipe, reduces fluid resistance, and is not easy to adhere to impurities and corrosive substances, thereby further improving the corrosion resistance and service life of the pipe.

Applications

This kind of pipe is widely used in many industries. It can be used as seamless pipes and steam pipes in power plants, seawater exchangers and evaporators in the marine industry, and is applicable to sulfuric acid and hydrochloric acid environments, crude distillation equipment, and deep - sea water equipment such as pump shafts and propellers. It is also used in the nuclear industry to make equipment for uranium extraction and isotope separation, as well as pumps and valves for hydrochloric acid production equipment.