Common steel plates are made of ordinary carbon steel, stainless steel, high-speed steel, high manganese steel, etc. Their main raw material is molten steel, which is a material made by mechanical pressing after the molten steel is poured and cooled. Most of the steel plates are flat or rectangular, which can not only be pressed mechanically, but also be cut with wide steel strips. The thickness of steel plates is large, and they can be divided into thin, thick and extra thick steel plates.
When purchasing steel, you need to check whether its outer layer has fold marks. If there are broken lines on the surface, this may be because the manufacturer has ears due to too much pressing down in order to improve efficiency, which will be formed when the next process is rolled. This type of steel is easy to break during operation, and it is not recommended to use.
When purchasing steel, it is necessary to ensure that its outer layer is free of pitted surface. If there is, it means that the steel quality is not up to the standard. It is made by the manufacturer using the non-standard groove in order to reduce costs. In addition, if there is scar mark on the outer layer of steel, do not buy it, which indicates that its material content is impure, or the production equipment is poor, which causes the problem of scar after rolling.
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