Monel 400 and Inconel 718
What is the difference between Monel 400 and Inconel 718?
Monel Alloy 400 depends largely on the addition of copper to its composition, while Hastelloy C276 has additions of molybdenum, chromium and tungsten, which provide greater solid solution strengthening and thus higher tensile strength.
Does Monel 400 rust?
Monel 400 is a nickel-copper alloy whose general properties include good corrosion resistance, good weldability, and medium to high strength. It can withstand attack by hot seawater and steam, as well as alkaline solutions and salts.
What is Inconel 718 used for?
Inconel 718 is the most popular nickel-based high-temperature alloy, widely used in aerospace, automotive and energy industries due to its excellent thermomechanical properties.
Does Inconel 718 rust?
Inconel 718 alloy has good corrosion resistance in general seawater environments, but corrosion may still occur in certain extreme marine conditions, such as high salinity, high temperature and elevated chloride ion concentrations.
Difference Between Monel 400 And Inconel 718
Composition and Properties
Monel 400 is a nickel-copper alloy containing up to 67% nickel, up to 23% copper, and small amounts of iron, manganese, and carbon. It has high strength and excellent corrosion resistance, especially in acidic and alkaline environments. Monel 400 can also withstand high temperatures and pressures, making it suitable for use in the marine and chemical industries.
Inconel 718 is a nickel-chromium alloy containing up to 55% nickel, up to 21% chromium, and small amounts of iron, niobium, and molybdenum. Compared to Monel 400, Inconel 718 has higher strength and better oxidation and fatigue resistance, making it ideal for aerospace and gas turbine applications. Inconel 718 can withstand temperatures up to 704°C (1300°F) and has high creep resistance.
Manufacturing and Processing
Monel 400 has lower hardness and strength, making it easier to process than Inconel 718. It can be welded and brazed using standard processes, and has good ductility and formability. Monel 400 is also less susceptible to stress corrosion cracking than other nickel alloys, making it ideal for high-stress applications.
On the other hand, Inconel 718 has higher hardness and strength, so it requires more advanced manufacturing and processing techniques. It can be improved through heat treatment, and has good weldability and formability when processed correctly. Inconel 718 is also more resistant to corrosion and erosion than many other nickel alloys, making it ideal for harsh environments.
Applications
Monel 400 is commonly used in offshore engineering, chemical processing, and the electronics industry for its excellent corrosion resistance and strength. It is also used to make fuel tanks, pump and valve components, and heat exchangers. Monel 400 is ideal for seawater applications due to its resistance to saltwater corrosion and biofouling.
Inconel 718 is widely used in the aerospace and gas turbine industries for its high strength, oxidation resistance, and creep resistance. It can be used to make jet engine components, turbines, springs, and bolts. Inconel 718 is also used in chemical processing, nuclear reactors, and cryogenic applications for its excellent mechanical properties and resistance to high temperatures and pressures.
Conclusion
Gnee Steel is a supplier of Monel 400 And Inconel 718, with products covering tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. We work with steel mills to provide customers with 625 alloy, and its products meet or exceed many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells Monel 400 And Inconel 718 tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. You are welcome to contact us for a quote at any time at ss@gneesteel.com
