Classification and main application fields of medium and thick steel plate
1. Introduction of medium and thick plate
A type of plate whose thickness is much less than the plane size commonly used in engineering. A steel plate with a thickness of 4.5mm to 25mm is called a medium-thick plate. Medium thick plate refers to the thickness of 4.5-25.0mm steel plate, the thickness of 25.0-100.0mm is called thick plate, and the thickness of more than 100.0mm is extra thick plate.
2.The use of medium and thick plate
Medium and thick 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, bridge and automobile static steel plates, low alloy steel plates, shipbuilding steel plates, boiler steel plates, pressure vessel steel plates, patterned steel plates, automobile girder steel plates, tractor parts and welding components.
(1) Bridge steel plate: steel plate for large railway Bridges, requiring dynamic load, impact, vibration, corrosion resistance, such as: Q235q, Q345q, etc.
(2) Shipbuilding steel plate: used to manufacture Marine and inland ship hulls, requiring high strength, plasticity, toughness, cold bending performance, welding performance, corrosion resistance are good. Such as: A32, D32, A36, D36, etc. Boiler plate (boiler plate) : used to manufacture a variety of boilers and important accessories, because the boiler plate is in the middle temperature (350°C below) high-pressure state of work, in addition to withstand high pressure, but also by impact, fatigue load and water and gas corrosion, require to ensure a certain strength, but also have good welding and cold bending performance, such as: Q245R.
(3) Steel plate for pressure vessels: Mainly used in the manufacture of petroleum, chemical gas separation and gas storage and transportation pressure vessels and other similar equipment, the general working pressure in the normal pressure to 320kg/cm2 or even to 630kg/cm2, the temperature in the range of -20-450°C work, the container steel plate in addition to a certain strength and good plasticity and toughness, but also must have good cold bending and welding performance, Such as: Q245R, Q345R, 14Cr1MoR, 15CrMoR, etc.
(4) Steel for automobile girder: Manufacturing automobile girder (longitudinal beam, beam), with a thickness of 2.5-12.0mm low-alloy hot-rolled steel plate. Due to the complex shape of the automobile girder, in addition to requiring high strength and cold bending performance, it also requires good stamping performance.
