Morphological classification of stainless steel

Stainless steel can be divided into five categories: rolled plates, plates, profiles, steel pipes, and components, with the most important being rolled plates. Shapes are various materials made of plates with different shapes, including angle steel, flat steel, I-beam, and channel steel. Steel pipe mainly refers to seamless steel pipe, which is opposite to welded pipe, and the difference lies in whether it is formed in one go. The components mainly refer to elbows, flanges, and other small things.

Coiled material and sheet metal are actually the same, with different factory forms. Coiled material is rolled one by one, and sheet metal is made one by one. If it leaves the factory, it is a sheet metal, also known as original sheet metal. Generally, it is a thick sheet metal, but it cannot be rolled because it is very thick. Generally, it cannot be rolled if it is over 16 millimeters

There are rolls and boards, and often they are boards. The prices of rolls and boards are also different. If purchasing rolls, they are calculated based on actual weighing, so the price is high. If the board is calculated based on theory, the price is low. The reason is that there is a price difference, such as the actual thickness of 10mm may be 9.6mm, which will result in a price difference between them.

Stainless steel plates are divided into hot rolling and cold rolling according to the different rolling processes of the rolling mill (which is the name of the rolling machine). Hot rolling is usually labeled as NO.1, and cold rolling is labeled as 2B or BA (BA has a better and brighter surface than 2B, close to the mirror, and the best is the mirror surface. The mirror surface is not in stock and needs to be processed). For example, 304 is often purchased as a plate, which means that the coil must be flattened into a plate by a machine, which is called a flattening machine. By using a flattening machine to flatten, different lengths can be cut. If it is not a regular length, it is called a fixed opening, which means a fixed opening size. Because customers often require different lengths based on actual needs, the coil becomes important at this time, and conventional plates cannot meet the requirements.

Domestic cold rolling is generally below 3mm, and hot rolling is generally above 3mm. There are both hot rolling and cold rolling for 3mm thickness, but imported cold rolled sheets can have a thickness of less than 4mm or even less than 6mm. Hot rolled plates with a thickness of 3mm to 12mm are called medium plates, while those with a thickness of 12mm or more are called thick plates, which can be thicker than 120mm. They are also called hot rolled medium plates, while cold rolled plates are called cold rolled thin plates.

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