Stainless steel bars (GB 1200-92)
Stainless steel is a special steel that is resistant to corrosion, acid and alkali, and has no rust in the air. It is mainly used to make products with high hardness, wear resistance and corrosion resistance, such as aviation, petrochemical, metallurgical machinery, construction and other industries. Regular bar products, stainless steel bars, belong to the category of stainless steel solid material. Stainless steel is divided into austenitic steel, ferritic steel and martensitic steel according to its crystal structure. As a special steel, stainless steel has many properties and is widely used. Generally speaking, stainless steel bars are the most widely used varieties of stainless steel products.
The GB 1200-92 standard defines the requirements and technical indicators of stainless steel bars. The stainless steel bars are roughly divided into round bars, flat bars, square bars and flat sections according to their shapes and cross-section shapes. The product material shall be austenitic steel and martensitic steel. The requirements of the products are represented by testing mechanical properties, and the GB1200-92 standard specifies the tensile strength and yield strength of the corresponding materials and specifications. In addition, stainless steel bars also require that their chemical compositions and microstructure meet the requirements.
The properties of stainless steel bars are mainly determined by their chemical components, that is, by their compositions, and their mechanical properties are also affected by their processing methods. GB 1200-92 specifies the requirements for the chemical composition of products and their manufacturing processes. In general, the manufacturing process of stainless steel bars requires strict control of the processing parameters. For example, the annealing process requires strict control of the heating temperature and holding time in order to obtain the specified mechanical properties and minimize the content of harmful inclusions.
Stainless steel bar products have good comprehensive performance. Their high strength, good toughness and plasticity make it have good cold and hot processing performance. At the same time, it has the advantages of good corrosion resistance and certain hardness. This kind of products are widely used in nuclear industry and food machinery industry. It is also used to manufacture fasteners and springs with better properties than other steels, and to make components with high oxidation resistance, corrosion resistance and accurate size.
In summary, stainless steel bars (GB 1200-92) have strict requirements for product materials, mechanical properties, chemical components and manufacturing processes. Their comprehensive performance is good and their application range is wide. The product is an important raw material for the development of stainless steel industry and an indispensable part of stainless steel products.
