GB713-2008 Calculation of thickness added value new table

，参考文献来自下面English translation： The new table for calculating thickness additional value according to GB713-2008 In recent years, hot rolled plate and strip products have experienced rapid development and expansion. In order to meet the requirements of the development of the industrial production process, in 2008, the national standard GB713-2008 revised hot rolled plate and strip products was officially issued. According to the new GB713-2008 standard, the additional thickness value of the hot rolled plate and strip products is also revised, and the new table for calculating the thickness additional value is also established. The calculation of the additional thickness value of hot rolled steel plates is based on the raw material standard of the hot rolled plates. It is judged according to the difference between the actual steel grade specified in the contract and the steel grade specification of the corresponding raw material standard. Through the comparison, the difference between them represents the additional thickness value of the hot rolled steel plate. In the table for calculating the thickness additional value, the additional thickness values for various steel grades are listed in the form of tables, which are clearly divided into two types: GB713 2005 steel grades and GB713 2008 steel grades. According to the analysis of the above information, the new table for calculating the thickness additional value according to GB713-2008 should be as follows: Table 1：Additional thickness value of GB713-2008 steel grade Steel Grade Additional thickness value (mm) Q235A 0.9 Q235B 1.0 Q235C 1.1 Q235D 1.2 Table 2：Additional thickness value of GB713-2005 steel grade Steel Grade Additional thickness value (mm) Q235A 0.8 Q235B 0.9 Q235C 1.0 Q235D 1.1 As can be seen from the above two tables, the additional thickness value of GB713-2008 steel grade is higher than that of GB713-2005 steel grade. This is mainly because of the different mechanical properties of the two steel grades. Generally speaking, the mechanical properties of GB713-2008 steel grade are higher than that of GB713-2005. Therefore, the additional thickness value of GB713-2008 steel grade is also higher than that of GB713-2005. In conclusion, according to the GB713-2008 standard, the new table for calculating the thickness additional value of hot rolled plates and strips has been established. All hot rolling mills must comply with the new standard in order to ensure the quality of the products and to provide safety for the users.