Stainless steel can be divided into five categories: coils, plates, profiles, steel pipes, and parts, the most important being coils and plates. Profiles are materials of various shapes made of plates, including angle steel, flat steel, I-beam, and channel steel. Steel pipe mainly refers to seamless steel pipe, and the opposite of seamless steel pipe is welded pipe. The difference lies in whether it is formed at one time. Components mainly refer to elbows and flanges and other small things.
The coiled material and the plate are the same, but the factory form is different. The coiled material is a roll, and the plate is a sheet. If the factory is a plate, it is also called the original plate. It is usually a thick plate because it is very thick. If it is too large, it cannot be rolled, generally, it cannot be rolled if it is more than 16 mm.
There are rolls and plates, and most of the time it is plated, and the prices of rolls and plates are also different. If you purchase rolls, it is calculated according to the actual weight, so the price is high, and the plate is calculated according to theory, so the price is low. , the reason is that there is a difference. For example, the thickness of 10mm may be 9.6mm, and there will be a price difference in the middle.
Stainless steel plates are divided into hot rolling and cold rolling according to the rolling process of the rolling mill (the rolling mill is the machine name of the rolling plate). Hot rolling is usually marked as NO.1 and cold rolling is marked as 2B or BA (BA is better than 2B surface, To be bright, close to the mirror, the best is the mirror surface, the mirror surface is not in stock, and it needs to be processed), for example, 304 is often a purchased board, which means that the roll must be flattened into a plate by a machine, this machine is a flattening machine. The flattening machine can be opened into different lengths. If it is not a conventional length, it is called a fixed opening, which means that the size is fixed, because customers often ask for different lengths according to actual needs. At this time, the role is very important. Conventional The board does not meet the requirements.
Domestic cold rolling is generally less than 3 mm, hot rolling is generally more than 3 mm, and the thickness of 3 mm includes both hot rolling and cold rolling, but the thickness of imported cold rolled plates can be less than 4 mm or even less than 6 mm. Hot-rolled plates from 3 mm to 12 mm are called medium plates, and those above 12 mm are called thick plates, which can be thicker than 120 mm, and are also called hot-rolled medium plates, while cold-rolled plates are cold-rolled thin plates.
