China's national standard GB/T15574-2016 "Classification of Iron and Steel Products" roughly divides strip into thin plate (less than 3mm) and thick plate (not less than 3mm). In scientific research and production, strip steel is divided into five categories according to its thickness: ultra-thin strip steel, thin plate, medium plate, thick plate and extra-thick plate.
In China, steel plates with a thickness below 0.2mm are called extremely thin steel plates, steel plates with a thickness of 0.2-3mm are called thin plates, steel plates with a thickness of 3-20mm are called medium plates, and steel plates with a thickness of 20-60mm are called thick plates? [2], the thickness of more than 60mm steel plate is called extra thick plate.
Extended data
Use of thick plate, medium plate and thin plate;
1, sheet
In industrialized countries, the output of steel plates accounts for about 50 ~ 60% of all steel plates, and the output of thin steel plates accounts for more than half of all steel plates. On the one hand, the rapid development of some important industrial sectors has greatly improved the requirements for the quality and quantity of raw materials.
On the other hand, it is also possible to supply a large number of kinds of sheets and strips with low price and high quality under modern technical conditions, which makes the automatic metal processing lines of various industrial departments use sheets and strips more and more as raw materials, which further promotes the development of sheet and strip production.
Today's sheet production comprehensively utilizes the latest achievements of modern metallurgy, electromechanical and computing technology, and becomes the workshop with the highest energy efficiency, mechanization and automation in the production process. It is indeed a pioneer in the modernization of steel rolling production.
2. Medium and thick steel plate
Plate is mainly used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridge construction and so on. It can also be used to manufacture various containers, furnace shells, furnace plates, static steel plates for bridges and automobiles, low-alloy steel plates, shipbuilding steel plates, boiler steel plates, pressure vessel steel plates, patterned steel plates, automobile girder steel plates, some parts of tractors and welding parts.
Application of medium and heavy plate: it is widely used to manufacture various containers, furnace shells, furnace plates, static steel plates for bridges and automobiles, low-alloy steel plates, steel plates for bridges, customized steel plates, boiler steel plates, pressure vessel steel plates, patterned steel plates, automobile girder steel plates, tractor parts and welded components.
3. Thick plate
Widely used in the manufacture of various containers, furnace shells, furnace plates, static steel plates for bridges and automobiles, low-alloy steel plates, steel plates for bridges, customized steel plates, boiler steel plates, pressure vessel steel plates, patterned steel plates and automobile girder steel plates. Some parts and welding parts of tractor.
Steel plate for bridge: used for large railway bridges. It is required to withstand dynamic load, impact, vibration and corrosion resistance.
Shipbuilding steel plate: used to make the shells of marine and inland ships. It requires high strength, plasticity, toughness, cold bending performance, welding performance and corrosion resistance.
Boiler steel plate (boiler plate): used to manufacture various boilers and important accessories. Because the boiler steel plate works under medium temperature (below 350°C) and high pressure, it not only bears high pressure, but also bears impact, fatigue load, water and gas corrosion, which requires certain strength and good welding and cold bending performance.
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