What is the difference between uns N06625 and uns N08825?
Nickel alloy 625 is a nickel-chromium-molybdenum-niobium alloy material with a main content of at least 58% nickel, also known as Inconel 625 or UNS NO6625, used for pipes according to standard ASTM B444, or for coils according to ASTM B443. Other chemical contents include 20% to 23% chromium, 3.15% to 4.15% columbium + tantalum, 8.0% to 10.0% molybdenum, a maximum of 1.0% columbium and cobalt, and a maximum of 5.0% iron.
Density 8.4g/cm3, melting point 1290-1350℃. It has excellent corrosion resistance to inorganic acids and various corrosive media in oxidizing and reducing environments.
Inconel 625 / Inconel 625 / UNS N06625 Properties
Inconel Alloy 625 is a non-magnetic, corrosion-resistant, oxidation-resistant, nickel-chromium-based solid solution strengthened deformed high-temperature alloy.
A solid solution strengthened nickel-based deformed high-temperature alloy with molybdenum and niobium as the main strengthening elements. Inconel 625's high strength is due to the hardened combination of molybdenum and niobium on an alloyed nickel-chromium matrix. The addition of molybdenum works with niobium to harden the alloy matrix, providing high strength without the need for intensive heat treatment.
Inconel 625 is extremely resistant to a wide range of exceptionally severe corrosive environments, including high temperature effects such as oxidation and carburization, including corrosion. Because the refractory Co and Mo are solid solutions in the nickel-chromium matrix, 625 has excellent strength and toughness at high temperatures as low as 2000°F (1093°C).
Inconel 625 Composite Pipe Liner/Nickel Alloy 625 Overlay
Inconel 625 material can be overlayed or lined on high strength carbon steel pipes such as API 5L X60, X65, High corrosion resistance. Environments include oceans, airspace, chemical plants, and petrochemical industries.
Internal cladding or lining of carbon steel pipes with Inconel 625 material has become a popular choice to solve corrosion problems and save significant costs.
Advantages of Inconel 625
High tensile strength and high corrosion fatigue performance;
Highly resistant to oxidation at high temperatures up to 1050C.
Good processing performance and good welding performance;
Excellent corrosion resistance and oxidation resistance;
Resistant to stress corrosion in salt spray atmosphere;
Outstanding resistance to pitting corrosion, crevice corrosion and intergranular corrosion;
Excellent mechanical properties at both very low and very high temperatures;
Almost completely prevents chloride-induced stress corrosion cracking;
Good resistance to acids (such as nitric, phosphoric, sulfuric and hydrochloric acids) and alkalis makes it possible to build thin structural components with high heat transfer.
Nickel alloy 625/Inconel 625/UNS N06625 has extremely low corrosion rate in both marine and non-marine environments, has good resistance to seawater corrosion, resistance to corrosion from various salt solutions, and good corrosion resistance to HNO3 phosphoric acid. Resistant to heating to boiling point. It also has considerable resistance to the following HCl and low-concentration sulfuric acid. The alloy will undergo age hardening after long-term use at 550-700°C, which will cause the plasticity of N06625/No6625 alloy to decrease. and resistance to chloride ion stress corrosion cracking, making it an excellent choice for seawater and aerospace applications.
