What are the characteristics of 800H?
What are the characteristics of 800H?
800H alloy is a nickel-based alloy with excellent high-temperature properties and corrosion resistance. It is widely used in industrial fields under various extreme environments. The specific features are as follows:
High temperature corrosion resistance: 800H can provide excellent corrosion resistance in extremely high temperature aqueous media up to 500 degree . Resistance to stress corrosion: This alloy has good resistance to stress corrosion, making it stable in stressed environments.
Good processability: 800H has good processability and can be cold formed, welded, etc. through conventional stainless steel technology.
Stable metallographic structure: It has a face-centered cubic lattice structure. The extremely low carbon content and increased Ti:C ratio increase the stability of the material and maximize the resistance to sensitization and intergranular corrosion. Excellent mechanical properties: 800H can maintain excellent mechanical properties even in high temperatures and highly corrosive environments.
Solid solution treatment: After special solution treatment, the tensile strength of 800H above 600 degree is significantly improved. The usual working temperature is between 600~800 degree and can reach up to 850 degree . Fatigue resistance: Because it contains appropriate amounts of aluminum, titanium and other elements, 800H also has certain fatigue resistance properties and is suitable for parts that move at high speeds and are frequently started, such as automobile engine exhaust valves. Resistant to various corrosions: The alloy also has good resistance to corrosion by PbO (lead oxide), V2O3 (vanadium trioxide), sodium and sulfur, and is suitable for use as exhaust valve materials for diesel and gasoline engines.
In summary, 800H alloy has broad application prospects in high-temperature applications and harsh environments due to its high temperature resistance, corrosion resistance and excellent mechanical properties.
