Monel 400 is a nickel-copper alloy known for its exceptional corrosion resistance, temperature resilience up to 1000°F, and suitability for various industrial applications, including chemical manufacturing and maritime components.
Monel 400, also known as UNS N04400 or NCu30, is a venerable nickel-copper alloy with a history spanning over 100 years. Renowned for its exceptional corrosion resistance and ability to withstand temperatures up to 1000°F (538°C), Monel 400 has earned its place as one of the most popular corrosion-resistant alloys in the market. Its ability to remain non-brittle in extremely cold conditions adds to its significance. Manufactured through both hot and cold processes, Monel 400 exhibits superior mechanical processing characteristics in cold-formed materials. However, it possesses some degree of magnetism, making it unsuitable for applications requiring non-magnetic materials.
Characteristics and Advantages of Monel 400
Monel 400 features a high-strength single-phase solid solution structure, making it a widely utilized and excellently manufactured corrosion-resistant alloy. It exhibits outstanding corrosion resistance in hydrofluoric acid and fluorine gas, as well as impressive corrosion resistance in hot concentrated alkali solutions. Additionally, Monel 400 resists corrosion from neutral solutions, water, seawater, atmospheric conditions, and organic compounds. An important characteristic of Monel 400 is its general resistance to stress corrosion cracking, coupled with excellent machining properties.
In seawater, slightly brackish water, and fresh water, Monel 400 displays remarkable corrosion and crack resistance. It maintains reliable mechanical performance across a temperature range from sub-zero to 1000°F, showcasing resilience to a variety of chemicals, including deaerated hydrochloric and hydrofluoric acids, chlorides, salts, and alkalis.
Industries and Applications of Monel 400
Due to its outstanding corrosion resistance and temperature resilience, Monel 400 finds particular suitability in chemical manufacturing and maritime applications. It is commonly used to manufacture components exposed to extremely harsh conditions and stress, such as fasteners, fixtures, shafts, springs, pumps, valves, containers, pipes, and heat exchangers.
