Under high temperature conditions, austenite has higher stability and strength than ferrite. It has excellent thermochemical stability and high temperature strength, and the maximum oxidation temperature can reach 850. At the same time, the steel also has excellent welding performance and machining performance. But its alloying elements are more than 26% by mass, making them expensive. 1Cr19Ni9 and 0Cr19Ni9(equivalent to TP304 and TP304H of the United States and SUS304TB and SUS304TP of Japan) are austenitic stainless steels with excellent processing technology and welding performance, good microstructure stability and thermal strength. The steel has a maximum temperature of 650 degrees.
Oxidation temperature up to 850℃, allowable oxidation temperature for boiler tube is 705℃, which can be used to manufacture large boiler superheater, reheater and steam pipe. 1Cr19Ni11Nb and 0Cr18Ni11Nb are Nb stable austenitic hot rolled steels with high thermal strength and intercrystalline corrosion resistance and good process and welding performance. It is mainly used for manufacturing large boiler superheater, reheater and steam pipe. Maximum operating temperature 650℃, for boiler tube allowable oxidation temperature 705, 0Cr17Ni12Mo2 is a common austenitic stainless steel heat resistant steel. Compared with other austenitic hot steels, the steel contains 2% ~ 3% Mo, which significantly improves its corrosion resistance and corrosion resistance, while still having good thermal strength, cold deformation and welding properties. Can be used to manufacture large boiler superheater, reheater and steam pipe, high temperature corrosion resistant bolt, spot corrosion parts.
