Rock Support Steel Plate Flat shape steel
It is a slab of steel, which is made of steel water and cooled.
The steel plate is flat, rectangular, which can be rolled directly or cut by wide steel strips.
The steel plate is divided by thickness, the sheet steel is < 4 mm (the thinnest 0.2 mm), thick steel plate 4 ~ 60mm, the heavy steel plate 60 ~ 115 mm.
The steel plates are divided by rolling, hot rolled and cold rolled.
The width of the sheet is 500 ~ 1500 mm. The width is 600 ~ 3000 mm. Divide sheet according to the grade of steel, ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet, etc.; According to the professional use, there are oil barrel boards, enamel boards and bulletproof boards. It is coated with galvanized sheet, tin plate, lead-coated sheet, plastic composite steel plate, etc.
The thickness of the editor
The steel of the thick steel plate is generally the same as the sheet steel. In all aspects, in addition to the bridge plate, boiler plate, automotive steel, pressure vessel steel plate and multilayer high pressure vessel steel and other varieties is thick plate, some varieties of steel such as automobile beam steel plate (2.5 ~ 10 mm thick), decorative pattern plate (2.5 ~ 8 mm thick), stainless steel, heat-resistant steel and other varieties with thin cross.
Also, the steel plate and the material say, not all the steel plates are the same, the material is different, the place that the steel plate USES, also is different.
Performance editing of alloy steel
With the development of science and technology and industry, puts forward higher requirements on materials, such as higher strength, high temperature, high pressure and low temperature resistance, corrosion resistance, abrasion and other special physical and chemical performance requirements, the carbon steel can not fully meet the requirements.
The shortage of the carbon steel
(1) the hardenability is low. Generally, the maximum quenching of carbon steel water is 10mm - 20mm.
(2) the strength and the strength are low. For example, the sigma s of the normal carbon steel Q235 steel are 235MPa, while the lower alloy steel 16Mn sigma s is more than 360MPa. 40 steel sigma s/sigma b is just 0.43, well below alloy steel.
(3) poor return stability. Due to low tempering stability, the steel is low temperature-sensitive in order to ensure the high intensity of the tempering treatment. In order to ensure the good toughness, the high tempering temperature is low, so the overall mechanical performance of carbon steel is low.
Failure to meet the requirements of special performance. Carbon steel tends to be poor in oxidation, corrosion resistance, heat resistance, low temperature, abrasion resistance and special electric magnetism, and cannot meet the requirements of special performance.