1.Crude stainless steel smelting process: At present, the smelting process for producing stainless steel in the world is mainly divided into one-step method, two-step method and three-step method, as well as new integrated production methods. The one-step smelting method is: molten iron + AOD; the two-step method is: EAF + AOD. The three-step method is: EAF+AOD+ VOD. In addition to several traditional production processes, the current integrated production process, that is, the production process from molten iron directly to stainless steel, has also been adopted by many companies. The production process is:RKEF+AOD.

Carbon steel refers to an iron-carbon alloy with a carbon content of less than 1.35%, which also contains impurities such as silicon, manganese, phosphorus, sulfur and other trace residual elements within a limited amount. Carbon steel is the earliest and most used basic material in modern industry. While striving to increase the output of low-alloy high-strength steel and alloy steel, industrial countries in the world also pay great attention to improving the quality of carbon steel and expanding the variety and scope of use. . Especially since the 1950s, new technologies such as oxygen converter steelmaking, out-of-furnace injection, continuous steel casting and continuous rolling have been widely used, further improving the quality of carbon steel and expanding the scope of use.

Stainless steel is short for stainless steel, which is resistant to weak corrosion medium such as air, steam and water or stainless steel with rust resistance; The steel that is resistant to chemical corrosion medium (acid, alkali, salt and other chemical etching) is called acid resistant steel.

1. Structural steel The production of general structural steel and welded structural steel is mainly used for the production of steel structural parts, bridges, ships and vehicles.
2. Weather-resistant steel is added with special elements (P, Cu, C, etc.), which has good corrosion resistance and atmospheric corrosion resistance. It is used in the production of containers, special vehicles, and also in building structures.

Compared with ordinary building boards, steel coils have stronger scratch resistance, and are not easy to leave scratches after being scratched by sharp objects, so they are often used to make home appliances and rolling shutter doors and windows. In addition, because of their good weather resistance , and easy to form, it is also often used as a substitute for wood.