The first one, in the European standard DX51D, D stands for ‘plated’, which means that the steel plate on the surface is a plated steel plate. X means ‘zinc’. Among them, 51D represents the purpose. 51D represents general structural steel. Or 52D in the grade means that the board is a stamping board. If it is 53D, the surface is used for deep drawing. As the X number in 5XD increases, it means that the better the rigidity, the stronger the stamping softness. European standard is generally adopted by earlier state-owned steel mills, such as Anshan Iron and Steel, Benxi Iron and Steel, Wuhan Iron and Steel, etc. European signs are generally such as: DX51D+Z/AZ DX52D+Z/AZ DX53D+Z/AZ DX54D+Z/AZ.

The second one is American Standard ASTM A792. As for the American standard, there is less contact with people, so I cannot express it in words for the time being. Please forgive me. However, it is known that American Standard is generally adopted by some domestic joint ventures. Such as: Yehui China, South Korea and other steel mills. The foreign trade orders of joint ventures are large domestic and domestic enterprises, so in order to cater for export trade, it is natural to adopt American standard.

The third type, the Japanese standard SGCC, here is a special introduction to the letters and numbers of the zinc layer content behind the Japanese standard, such as the general daily standard SGCC+Z. Zinc layer weight mark will be added after Z, such as SGCC+Z27. So some people will think that +Z27 means that the zinc content is 27 grams per square meter? no. Z27 and Z270 in the European standard above are the same meaning, that is, the meaning of galvanized 270 grams.

The fourth type is corporate standards. Enterprise standard is a steel grade developed by some large domestic steel mills according to international standards such as European standard, American standard and Japanese standard. Such as Baosteel’s Q/BQB 440-2009 TDC51D+Z/AZ standard. Baosteel Enterprise Stand

Post time: Apr-07-2022