Application of Monel 400 alloy, chemical composition of Monel 400 alloy

Monel 400 is mainly used in chemical and petrochemical industries as well as marine development. It can be used to manufacture various heat exchange equipment, boiler feed water heaters, petroleum and chemical pipelines, vessels, towers, tanks, valves, pumps, reactors, shafts, etc.

Monel UNS4400 is Monel 400

Monel400 is a corrosion-resistant alloy with the largest amount, the most extensive use and excellent comprehensive properties. This alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas media, and also has excellent corrosion resistance to hot concentrated alkali. At the same time, it is also resistant to corrosion by neutral solutions, water, seawater, atmosphere, organic compounds, etc.

An important feature of this alloy is that it generally does not produce stress corrosion cracks and has good cutting performance.

The chemical composition of Monel400 alloy is mainly composed of 28% Cu and 68% Ni plus a small amount of Fe (1%-2%). Due to differences in chemical composition, it can be available in a variety of alloy grades, but there is no significant difference in corrosion resistance between them. Monel400 alloy is more resistant to corrosion by reducing media than pure nickel and more resistant to corrosion by oxidizing media than pure copper.

The comparison table is as follows:

US UNS: N04400

German DIN: NICU30FE w-NR:

China GB T:

UK BS: na 12

Chemical composition number: NI68Cu28FE

Elemental content, % nickel, copper, 28min, 34max, iron, manganese, carbon, silicon, sulfur.

1. Grade: Monel400 copper-nickel corrosion-resistant nickel alloy.

2. Chemical Composition: Carbon C: Nickel Nini: 63 67, Aluminum Al: , Iron Fe Manganese Mn: Silicon Si: , Phosphorus P: , Sulfur Si: Copper Cu:

Three: the scope of application, the field of application:Perennial stock round bar, plate, seamless pipe, tape and reel!

Alloys are versatile materials that can be used in many industrial applications, such as seamless water pipes and steam pipes in power plants, seawater exchangers and evaporators, pump shafts and propellers for seawater use equipment, equipment for uranium refining and isotope separation in the nuclear industry, pumps and valves for hydrochloric acid production, etc. In the field of materials, alloys can be used to make seamless tubes, round tubes, welding strips, strips, and so on.

4. Physical properties: density g cm3 ( melting point ( 1300 1390) tensile strength b mpa (480) yield strength (170) elongation 5% (35).

Five: Overview: The alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives.

At the same time, it is more corrosion-resistant than copper-based alloys in seawater. Acid medium: corrosion-resistant in sulfuric acid with a concentration of less than 85%.

Monel400 is one of the very few important materials that can resist hydrofluoric acid. Water corrosion: Monel400 alloy not only has excellent corrosion resistance in most water corrosion cases, but also porosity and stress corrosion are rarely found, and the corrosion rate is less.

High temperature corrosion: The high temperature of continuous work in the air is generally about 600, and the corrosion rate is less than that in high temperature steam. Ammonia:

Due to the high nickel content of the alloy, it can resist corrosion under anhydrous ammonia and ammoniation conditions below 585.

Monel 400

Physical Properties: Density: , Melting Point: 1300-1350, Magnetism: None.

At the same time, Mengyuan Qingner 400 alloy has good mechanical properties, from low temperature to high temperature wide range of use temperatures, with good welding performance and medium and high strength.