1.What is the ASTM grade of Inconel 690?
Tensile Strength: The minimum tensile strength of Inconel 690 is typically around 620 MPa (90000 psi).
Yield Strength: The 0.2% offset yield strength is approximately 275 MPa (40000 psi).
Elongation: It has an elongation of about 30% in the annealed condition. In addition, Inconel 690 maintains good mechanical properties at high temperatures, with low creep and stress - rupture rates.
3.What is the chemical composition of inconel 690?
Nickel (Ni): The main component, with a content of around 58% minimum.
Chromium (Cr): Usually 27 - 31%.
Iron (Fe): 7 - 11%.
Carbon (C): Maximum 0.05%.
Manganese (Mn): Maximum 1.0%.
Silicon (Si): Maximum 0.5%.
Sulfur (S): Maximum 0.015%.
Copper (Cu): Maximum 0.5%.
4.What is the application of inconel 690 ?
Nuclear Industry: It is widely used in nuclear power plants, especially for components in contact with high - temperature and high - pressure water, such as steam generator tubing, due to its excellent corrosion resistance and stress - corrosion cracking resistance in such environments.
Chemical Processing: Inconel 690 is suitable for equipment used in handling corrosive chemicals, like reactors and heat exchangers, as it can resist attack from various acids and alkalis.
Petrochemical Industry: It is used in equipment exposed to harsh chemical conditions during oil and gas processing, such as in refineries for components that need to withstand high - temperature and corrosive environments.
5.What are the advantages of inconel 690?
Excellent Corrosion Resistance: It has outstanding resistance to a variety of corrosive media, particularly to stress - corrosion cracking in aqueous environments containing chlorides and hydroxides, which makes it highly reliable in harsh chemical and industrial settings.
High - Temperature Stability: Inconel 690 maintains good mechanical strength and stability at elevated temperatures, enabling it to be used in high - temperature applications without significant loss of properties.
Oxidation Resistance: It forms a dense and stable oxide layer at high temperatures, which effectively protects the material from further oxidation and extends its service life in high - temperature and oxidative environments.
Good Weldability and Fabricability: It can be welded and fabricated using common metalworking techniques, allowing for the production of complex - shaped components required in various industrial applications.
