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Carbon steel application process

Forums / Ideas / Carbon steel application process


2018-11-09 12:12

Carbon steel is the earliest and most used basic material in modern industry. In the industrial countries of the world, cut off disc for stainless steel,In China and some countries, according to the guarantee conditions of delivery, it is divided into three categories: Class A steel (A steel) is steel that guarantees mechanical properties. Class B steel (B steel) is a steel that guarantees chemical composition. Special steel (C steel) is a steel that not only guarantees mechanical properties but also ensures chemical composition, and is often used to manufacture more important structural parts. China currently produces and uses the most A3 steel (Group A steel) with a carbon content of about 0.20%, which is mainly used for engineering structures.
Some carbon structural steels also add trace amounts of aluminum or niobium (or other carbide forming elements) to form nitrides or carbide particles to limit grain growth, strengthen steel, and save steel. In China and some countries, in order to meet the special requirements of professional steel, the chemical composition and properties of ordinary carbon structural steel are adjusted, thus developing a series of professional steel for ordinary carbon structural steel (such as bridges, buildings, Steel for steel bars and pressure vessels, etc.).
(2) Compared with ordinary carbon structural steel, high-quality carbon structural steel has a lower content of sulfur, phosphorus and other non-metallic inclusions. According to the carbon content and the use, these steels are roughly divided into three categories: 1 is less than 0.25% C is low carbon steel, especially 08F, 08Al, etc. containing less than 0.10% carbon, due to good depth It is widely used as a deep-drawing part such as a car, a can, etc. for squeezing and weldability. 20G is the main material for the manufacture of ordinary boilers. In addition, low carbon steel is also widely used as a carburized steel for machinery manufacturing. 20.25~0.60%C is medium carbon steel, which is used in the state of quenching and tempering to make parts of machinery manufacturing industry. 3 is greater than 0.6% C for high carbon steel, mostly used in the manufacture of springs, gears, rolls and so on. According to the difference of manganese content, it can be divided into two groups of ordinary manganese content (0.25-0.8%) and higher manganese content (0.7-1.0% and 0.9-1.2%). Manganese can improve the hardenability of steel, strengthen ferrite, and improve the yield strength, tensile strength and wear resistance of steel. The label "Mn", such as 15Mn, 20Mn, is usually added after the grade of the steel containing high manganese to distinguish it from the normal manganese content of carbon steel.

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