Do you know all this knowledge about round steel?
Round steel refers to solid rectangular steel with a circular cross-section. Its specifications are expressed in diameter, in millimeters (mm). For example, "50mm" refers to a round steel with a diameter of 50 millimeters. Round steel is divided into three types: hot rolled, forged, and cold drawn. The specification of hot-rolled round steel is 5.5-250 millimeters. Among them: 5.5-25mm small round steel is mostly supplied in bundles of straight bars, commonly used as steel bars, bolts, and various mechanical parts; Round steel larger than 25 millimeters is mainly used for manufacturing mechanical parts, seamless steel pipe billets, etc.
Classification of round steel
1. Classification by chemical composition
Carbon steel can be classified into low carbon steel, medium carbon steel, and high carbon steel based on its chemical composition (i.e. carbon content).
2. Classification by steel quality
According to the quality of steel, it can be divided into ordinary carbon steel and high-quality carbon steel.
3. Classification by purpose
According to their usage, they can be further divided into carbon structural steel and carbon tool steel.
The difference between round steel and other steel bars
1. The appearance is different. Round steel has a smooth and round shape, with no lines or ribs, while other steel bars have grooves or ribs on the surface, resulting in a low bonding force between round steel and concrete, while other steel bars have a high bonding force with concrete.
2. The composition is different. Round steel (first grade steel) belongs to ordinary low-carbon steel, while other steel bars are mostly alloy steel.
3. The strength is different. Round steel has lower strength, while other steel has higher strength. That is, compared to other steel bars with the same diameter, round steel can withstand less tensile force, but its plasticity is stronger. That is, round steel has greater deformation before being pulled apart, while other steel bars have much smaller deformation before being pulled apart.
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