Monel 400 is the corrosion resistant alloy，which has the largest used dosage and excellent comprehensive properties. The alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas medium, and has excellent corrosion resistance to hot concentrated lye. At the same time, it is also resistant to neutral solution, water, seawater, atmospheric corrosion, organic compounds and so on. An important feature of this alloy is that it doesn’t produce stress corrosion crack, good cutting performance.
The metallographic structure of Monel 400:
The structure of Monel 400 alloy is high strength single phase solid solution.
The corrosion resistance of 400 Monel:
Monel400 alloy has very 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 alloy in seawater. Acid medium: Monel 400 is corrosion resistant in sulfuric acid with a concentration of less than 85%. Monel400 is one of the most important materials in corrosion resistant hydrofluoric acid. Water corrosion: Monel 400 alloy not only has excellent corrosion resistance and pitting corrosion, stress corrosion, etc. in most water corrosion circumstances, it are rarely found that the corrosion rate is less than 0.025mm/a. High temperature corrosion: the highest temperature that Monel 400 continuously worked in the air is generally at about 600 degrees, the steam at high temperature, corrosion rate is less than 0.026mm/a. Ammonia: due to the high nickel content of Monel 400 alloy, so it has corrosion resistance for anhydrous ammonia and ammoniation conditions at 585 degrees.
Monel 400 applications:
Monel400 alloy is a versatile material that can be used in many industrial fields.
1. The seamless pipe, steam pipe in water power plant
2. Water exchanger and evaporator
3. Sulfuric acid and hydrochloric acid
4. Crude oil distillation
5. The equipment used in seawater pump shaft and propeller
6. The nuclear industry for the manufacture of uranium isotope separation and refining equipment.
7. Pumps and valves for the manufacture of hydrochloric acid equipment
