In the case of application, it is a stainless steel plate dominated by metallographic organization. The magnesium content is between 11% and 30%, and it has a body-centered cubic molecular structure. This kind of steel generally has no nickel, and sometimes also contains a small amount of Mo, Ti, Nb and other elements. This kind of steel has the characteristics of large heat transfer coefficient, small thermal expansion coefficient, good oxidation resistance, and high-quality intergranular corrosion resistance. To manufacture parts that are resistant to corrosion by air, water vapor, water and amphoteric oxides. This steel has defects such as poor plastic deformation, post-weld plastic deformation and significantly reduced corrosion resistance, which limit its application. The use of out-of-furnace refining technology (AOD or VOD) can greatly reduce the void elements such as carbon and nitrogen, so this steel is widely used. It is mostly used for interior decoration design of engineering buildings, components of heavy oil burners, household items, and components of electrical products!