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Hot rolled plates, namely hot rolled steel plates and strips, commonly known as hot plates, are also usually written as rolled characters, such as hot rolled plates, but they all refer to the same kind of hot rolled plates. It refers to the steel plate with a width of more than or equal to 600mm and a thickness of 0.35-200mm and the steel strip with a thickness of 1.2-25mm. Hot rolled steel plates can be divided into medium and thick plates (with a thickness of more than 4mm) and thin plates (with a thickness of 0.35~4mm) according to the thickness. Cold rolled steel plates only have thin plates (with a thickness of 0.2~4mm). Thin steel plate can be galvanized on the surface (commonly known as white iron sheet), coated with organic coating (or color steel plate), etc. The thin steel plate is cold pressed or cold-rolled into corrugated, hyperbolic, V-shaped and other shapes, which is called profiled steel plate, and is mainly used for envelope, floor, roof, etc.

Hot rolled steel plate can destroy the casting structure of the ingot, refine the grain of the steel, and remove the defects of the microstructure, so that the steel structure is dense and the mechanical properties are improved. This improvement is mainly reflected in the rolling direction, so that the steel is no longer isotropic to some extent; Bubbles, cracks and looseness formed during pouring can also be welded under high temperature and pressure. The carbon content of hot rolled steel plate can be slightly higher than that of cold rolled steel plate. The density is the same under the condition of little consistency of components. However, if there is a large difference in composition, for example, the density of stainless steel plates, whether cold rolled or hot rolled, is about 7.9g/cm3. It depends on the composition. Hot rolled steel plates have good ductility, and the steel is also subject to pressure. Hot rolled steel plates are divided into structural steel, low carbon steel and welding bottle steel. Then, find the steel you need according to various steels, and check the density and composition of specific steels. Hot rolled steel plate has low hardness, easy processing and good ductility. Hot rolled steel plate has relatively low strength, poor surface quality (low oxidation finish), but good plasticity, generally medium thick plate, cold rolled plate, high strength, high hardness, high surface finish, generally thin plate, which can be used as stamping plate.

Article source: Jiangmen flat iron manufacturer:yijayi.cn