The difference with other steel round: 1 is not the same shape, round shape light circle, no pattern no ribs, other steel surface appearance has sculptured or ribs, thus causing a small bar and concrete adhesion while the adhesion of other large steel and concrete. Two ingredients are not the same, round (a steel) belonging to the ordinary low-carbon steel, alloy steel, other steel mostly. 3 is not the same intensity, low round strength, high strength steel the other, that is the same size in diameter as compared with other steel round bar, round bar can withstand tensile steel than other small, round plastic but stronger than other steel that round before pulled off a larger deformation, while the other pulled off in front of steel deformation is much smaller. According to the quality of steel can be divided into ordinary carbon steel and high carbon steel. (1) ordinary carbon structural steel, also known as ordinary carbon steel, restrictions on the carbon content, the performance range as well as phosphorus, sulfur and other residual elements content wider. In China and some countries are divided into three categories based on delivery guarantee conditions: Steel Group (A type of steel) is to ensure that the mechanical properties of the steel. B Steel (B class steel) is to ensure that the chemical composition of the steel. Special type of steel (C type steel) is both to ensure the mechanical properties but also to ensure the chemical composition of the steel, commonly used in the manufacture of the more important structural parts. China is currently the largest production and use of carbon content is about 0.20% of A3 Steel (Group 3 steel), mainly used in engineering structures. Some of the carbon steel also add a small amount of aluminum or niobium (or other carbide forming elements) forming a nitride or carbide particles to limit grain growth, strengthen the steel, save steel. In China and some countries in order to meet the special requirements of professional steel, chemical composition and properties of ordinary carbon steel to be adjusted in order to develop a series of ordinary carbon steel professional steel (such as bridges, buildings, steel, pressure vessel steel, etc.). (2) high-quality carbon structural steel and ordinary carbon steel compared to sulfur, phosphorus and other non-metallic inclusions lower levels. Depending on the carbon content and the use of such steel roughly divided into three categories: ① less than 0.25% C mild steel, especially in the carbon content of less than 0.10% of 08F, 08Al, etc., because with good depth Chong and weldability and is widely used as deep drawing parts such as automotive, canning ...... etc. 20G is the main material of manufacturing ordinary boiler. In addition, low-carbon steel is also widely used as carburizing steel, used in machinery manufacturing. ②0.25 ~ 0.60% C for carbon steel, much used in the quenched and tempered condition, production machinery manufacturing industrial parts. ③ greater than 0.6% C for the high-carbon steel, used for manufacture of springs, gears, rollers, etc. Depending on the amount of manganese can be divided into ordinary manganese content (0.25 to 0.8%) and high manganese content (0.7 to 1.0% and from 0.9 to 1.2%) two steel groups. Manganese can improve the hardenability of steel, reinforced ferrite, increase the yield strength of the steel, tensile strength and abrasion resistance. Usually after high grade manganese steel additional markings "Mn", such as 15Mn, 20Mn to distinguish it from normal manganese content of carbon steel. East Steel Pipe Co., Ltd. Liaocheng shelf channel, flat iron, galvanized flat iron, flat steel, pipe racks, pipe, alloy pipe, seamless tube, square tube, rod, rectangular pipe, galvanized pipe, galvanized square tubes, precision steel tubes, seamless pipe, seamless rectangular tube, seamless light tube, cross fastener, docking fastener, rotating fastener, Mirs rack tubes complete specifications, quality and cheap. 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