The structure of Monel 400 alloy plate (UNS N04400, NCu30) is a high-strength single-phase solid solution, which is a corrosion-resistant alloy with the largest amount, widest use, and excellent comprehensive performance. This alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas media, and also has excellent corrosion resistance to hot concentrated alkaline solution. It is also resistant to corrosion from 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.
This alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid, and their derivatives. At the same time, it has better corrosion resistance than copper based alloys in seawater.
Acid medium: Monel 400 is corrosion-resistant in sulfuric acid with a concentration of less than 85%. Monel 400 is one of the few important materials in durable hydrofluoric acid.
Water corrosion: Monel 400 alloy not only has excellent corrosion resistance under most water corrosion conditions, but also rarely experiences pitting corrosion, stress corrosion, etc., with a corrosion rate of less than 0.25mm/a
High temperature corrosion: The maximum temperature for continuous operation of Monel 400 in air is generally around 600 ℃. In high-temperature steam, the corrosion rate is less than 0.026mm/a
Ammonia: Due to the high nickel content of Monel 400 alloy, it can withstand corrosion under anhydrous ammonia and ammonification conditions below 585 ℃.
Post time: Jan-11-2024