Round steel refers to a solid long strip of steel with a circular cross-section. Its specifications are expressed in diameter, in mm, for example, "50mm" means a round steel with a diameter of 50 mm.

Round steel is divided into three types: hot rolled, forged and cold drawn. The size of hot rolled round bar is 5.5-250 mm. Among them: small round bars of 5.5-25 mm are mostly supplied in bundles of straight strips, which are often used as steel bars, bolts and various mechanical parts; round bars larger than 25 mm are mainly used for the manufacture of mechanical parts and billets of seamless steel pipes Wait.

The material of round steel is Q195, Q235, 10#, 20#, 35#, 45#, Q215, Q345, 12Cr1Mov, 15CrMo, 304, 316, 20Cr, 40Cr, 20CrMo, 35CrMo, 42CrMo, 40CrNiMo, GCr15, 65Mn, 50Mn , 50Cr, 3Cr2W8V, 20CrMnTi, 5CrMnMo, etc.

The difference between round steel and other steel bars:

The appearance of the round steel is different. The round steel has a smooth appearance, no texture and no ribs. The surface of other steel bars has engraving or ribbing, which causes the bonding force between the round steel and the concrete to be small, while the bonding force between the other steel bars and the concrete is small. strong;

The composition is different, round steel belongs to ordinary low carbon steel, and other steel bars are mostly alloy steel;

The strength of the round steel is different, the strength of the round steel is low, and the strength of other steels is high, that is, the round steel with the same diameter can withstand less tensile force than other steel bars, but the plasticity of the round steel is stronger than that of other steel bars. That is, the round steel has a large deformation before being broken, while the deformation of other steel bars is much smaller before being broken.

Round steel has strong anti-corrosion and anti-oxidation properties, firm solder joints and strong tensile force, so it is widely used in all walks of life, almost all machines, steel components, automobiles, and ships can use it.

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