With the continuous development of the steel industry, the proportion of hot-rolled plates in my country's steel structure industry is increasing. Hot-rolled products include hot-rolled strip billets, hot-rolled thin strips, hot-sent hot coils and other products. The main purpose is to produce plates, strips, pipes and profiles. The application fields include home appliance industry, automobile manufacturing industry, construction industry, etc., mainly steel for rolling mill production line of plate series and steel for automobile manufacturing, including cold coil, cold rolling, hot rolling and other series products.
P355NH steel plate is also widely used as production materials for steel materials used in thermal work equipment (such as oil drill pipes). During the rolling process, the rolling force and thickness of the P355NH steel plate have a large range of changes: from the original 150mm~200mm to the current 300mm~400mm; the thickness from the original 10mm to the current 15~ 20 mm. This change causes differences in material properties and shapes: under the same size, P355NH steel plate can bear larger dimensions (width and length) due to its larger thickness (thicker).
P355NH steel plate is used in the automobile manufacturing industry, petroleum drill pipe and other industries, as well as steel for cold working equipment and machinery manufacturing. P355NH steel plate is produced by hot rolling and has good performance and serviceability. This series of steel plates is mainly used for working in the atmosphere, sewage and seawater without corrosion protection and use requirements. It is used in conditions where the ambient temperature does not exceed 60°C, the working pressure does not exceed 70 MPa, and high quality requirements such as shock resistance and vibration are used (such as building structures).
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