What is steel plate?
The steel plate is a flat steel that is poured with molten steel and pressed after cooling. It is flat and rectangular, and can be directly rolled or cut from wide steel strips.
What are the classifications of steel plates?
1) Steel plates are divided by thickness, thin steel plates <4 mm (the thinnest 0.2 mm), medium-thick steel plates 4-60 mm, and extra-thick steel plates 60-115 mm.
2) Steel plates are divided into hot rolling and cold rolling according to rolling.
What are the special structural steel plates?
1. Steel plates for pressure vessels: use capital R to indicate at the end of the grade, and the grade can be expressed in terms of yield point or carbon content or alloying elements. Such as: Q345R, Q345 is the yield point.
2. Steel plate for welding gas cylinders: Use capital HP to indicate at the end of the grade, and its grade can be expressed by yield point, such as: Q295HP, Q345HP; it can also be expressed with alloying elements, such as: 16MnREHP.
3. Steel plate for boiler: Use lowercase g to indicate at the end of the grade. Its grade can be expressed by yield point, such as: Q390g; it can also be expressed by carbon content or alloying elements, such as 20g, 22Mng, 15CrMog, 16Mng, 19Mng, 13MnNiCrMoNbg, 12Cr1MoVg, etc.
4. Steel plates for bridges: Use lowercase q to indicate at the end of the grade, such as Q420q, 16Mnq, 14MnNbq, etc.
5. Steel plate for automobile beam: Use capital L to indicate at the end of the grade, such as 09MnREL, 06TiL, 08TiL, 10TiL, 09SiVL, 16MnL, 16MnREL, etc.