The brand prefixes of coated steel coils such as galvalume, color-coated coils, hot-dip galvanized coils, etc. are mostly as follows: the first one is the European standard EN. For example: DX51D+AZ/Z150; the second type is American standard ASTM, such as A653M CS; the third type is Japanese standard JIS, such as SGCC+Z27; the fourth type is Australian standard AS 1397, such as G300. So what does each brand mean? Here is a brief explanation of the brands we know.
The first one is that D in the European standard EN DX51D stands for "plated", which means that the steel plate on the surface is a coated steel plate. X means "zinc". Among them, 51D represents the purpose. 51D represents general structural steel. Or if the grade is 52D, it means that the plate is for stamping. If it is 53D, the surface is used for deep stamping. As the X number in 5XD increases, it means the better the rigidity, the stronger the stamping softness. European standards were generally adopted by earlier state-owned steel plants, such as Anshan Iron and Steel, Benxi Iron and Steel, Wuhan Iron and Steel, etc. European brand names are generally such as: DX51D+Z/AZ DX52D+Z/AZ DX53D+Z/AZ DX54D+Z/AZ.
The second type, American standard ASTM A792, is a standard established by the American Society for Testing and Materials. American standards are generally adopted by some domestic joint ventures. For example, steel mills such as Shangxing China and Korea United have large foreign trade orders for joint ventures. Therefore, in order to cater to export trade, it is natural to adopt American standards.
The third type is the Japanese standard JIS SGCC. Here we especially want to introduce the letters and numbers for zinc layer content behind the Japanese standard, such as the general Japanese standard SGCC+Z. Z will be followed by a zinc layer weight mark, such as SGCC+Z27. Then some people think that +Z27 means that the galvanizing content is 27 grams per square meter? no. Z27 has the same meaning as Z270 in the European standard above, which means 270 grams of galvanized steel. It should be pointed out that currently the only domestic factories that have passed JIS certification are Shangxing China and Baosteel.
The fourth type is the Australian standard AS 1397 G300. The 300 behind it represents the yield strength. Generally, most domestic projects exported to Australia specify this grade. At the same time, BlueScope Steel is a well-known company in the field of coating and plating, which plays a role in consolidating the entire grade.
For structural galvanized and galvalume steel coils used in construction, it is important to point out that the corresponding strength expressions of each standard are different. In terms of the domestic requirement for yield strength Q345 galvanized steel coils, the European standard EN S350GD+Z , American standard ASTM A653M GR340, Australian standard AS 1397 G350, the following values are expressed as yield strength, and they can meet the yield Q345, but different from the Japanese standard JIS G3302 SGH340, the numerical value in the Japanese standard SGH340 grade represents tensile strength 340. If you want To meet the yield strength Q345, the SGH440 specification needs to be specified.
The fifth type is corporate standards. Enterprise standard is a steel grade independently developed by some large domestic steel mills based on international standards such as European standards, American standards, and Japanese standards. Such as Baosteel's Q/BQB 440-2009 TDC51D+Z/AZ standard. Baosteel Enterprise Standard (Q/BQB) The steel grades in Baosteel Enterprise Standard can be roughly divided into three sources: steel grades transplanted from Japanese JIS standards, German DIN standards and self-developed steel grades. Steel grades transplanted from the Japanese JIS standard usually start with S (Steel); steel grades transplanted from the DIN standard usually start with ST (Stahl means "steel" in German); Baosteel independently developed The steel number usually starts with the first B in the pinyin of Baosteel. Baosteel's hot-dip galvanizing standards are explained as follows: Q---Enterprise Standard BQB---Baosteel Enterprise Standard 420---Standard Sequence Number Z: Pure Zinc (Z: Zinc Coating) 50/50---Double-sided 50g/m2 The amount of galvanizing is N---no splatter FC---high-grade finishing surface.
Here we take Baosteel as an example to introduce domestic steel brands. What does TDC51D+Z/AZ in Baosteel standards mean? T is the first letter of painted, T means coated plate, D still means plated plate, and 51D represents the steel grade use as in the European standard. There is no need to explain the use of 52D 53D 54D, it is the same as the European standard. The brand name of color-coated steel coils generally adds an English T word in front of galvanized or galvanized. Just talked about it. Xiangbao Steel's color steel plate coil is TDC51D+Z/AZ. Angang's color-coated plate is TDX51D+Z/AZ. Maanshan Iron and Steel's color-coated coils are TSGCC+Z/AZ.
With the continuous innovation of steel technology and the continuous development of science and technology, the grades are also constantly changing. I hope you will understand if there are other new brand standards or if there are any mistakes in the above explanation.
