The steel grade of thick steel plate is generally the same as that of thin steel plate. In all aspects of products, except for bridge steel plate, boiler steel plate, automobile manufacturing steel plate, pressure vessel steel plate and multi-layer high pressure vessel steel plate, which are all thick plates, some steel plates, such as automobile girder steel plate (2.5~10mm thick), checkered steel plate (2.5~8mm thick), stainless steel plate, heat resistant steel plate, etc., cross with thin plates.
In addition, the steel plate also has a material theory. Not all steel plates are the same. The materials are different, and the places where the steel plates are used are also different.
Properties of alloy steel:
With the development of science, technology and industry, higher requirements have been put forward for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion, wear and other special physical and chemical properties. Carbon steel can no longer fully meet the requirements.
Deficiency of carbon steel:
(1) Low hardenability. Generally, the maximum quenching diameter of carbon steel after water quenching is only 10mm-20mm.
(2) The strength and yield strength are relatively low. Such as ordinary carbon steel Q235 steel σ S is 235MPa, while low alloy structural steel 16Mn σ S is more than 360MPa. 40 steel σ s / σ B is only 0.43, much lower than alloy steel.
(3) Poor tempering stability. Due to the poor tempering stability, carbon steel needs to use lower tempering temperature to ensure higher strength during quenching and tempering, so the toughness of steel is low; In order to ensure good toughness, the strength is low when high tempering temperature is used, so the comprehensive mechanical property level of carbon steel is not high.
(4) It cannot meet the requirements of special performance. Carbon steel is often poor in oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, which cannot meet the requirements of special use performance.
It is a flat steel poured with molten steel and pressed after cooling.
It is flat and rectangular, and can be directly rolled or cut from wide steel strip.
The steel plates are divided into thin steel plates<4mm (the thinnest 0.2mm), medium thick steel plates 4~60mm, and extra thick steel plates 60~115mm.
The steel plate is divided into hot rolling and cold rolling according to rolling.
The width of the sheet is 500~1500 mm; The width of the thickness is 600~3000 mm. The thin plates are classified into ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron thin plates; According to professional purposes, there are oil barrel plates, enamel plates, bulletproof plates, etc; According to the surface coating, there are galvanized sheet, tinned sheet, lead plated sheet, plastic composite steel plate, etc.
Chengdu Jinyongcheng Metal Products Co., Ltd. The company's main business is an enterprise engaged in the wholesale and retail of steel products. The company mainly provides raw materials for the manufacturing industry, and special-shaped products can be customized.
Chengdu Jinyongcheng Metal Products Co., Ltd. was established on October 24, 2017. Its registered office is located in Building 1, No. 366, East Sixth Road, Checheng, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan Province. The legal representative is Liao Yong. The business scope includes production and sales: mechanical equipment, metal products, auto parts; sales: steel, mechanical and electrical products, electronic appliances, Wujinjiaodian, rubber products, building materials, electronic products, metal structural parts, non-ferrous metals (subject to approval according to law) Business activities can only be carried out after the approval of the relevant departments; without the relevant administrative license (approval), no business activities shall be carried out).
Yong Liao
289584567@qq.com