Description
Basic Description of Round Steel
Shape and Dimensions
Round steel, as the name implies, has a circular cross - section. It is a solid long - rolled product. The diameter of round steel can vary widely, usually ranging from a few millimeters to several hundred millimeters. For example, in construction, the commonly used diameters might be 6mm, 8mm, 10mm, etc., while in heavy - duty industrial applications, much larger diameters can be used.
Material Composition
Round steel can be made of different materials. The most common is carbon steel, which contains carbon as the main alloying element along with a small amount of manganese, silicon, sulfur, and phosphorus. The carbon content affects the mechanical properties of the round steel. For low - carbon round steel (carbon content generally less than 0.25%), it has good ductility and is easy to process. Medium - carbon round steel (carbon content around 0.25% - 0.6%) has higher strength and hardness, and high - carbon round steel (carbon content more than 0.6%) is even harder and stronger but less ductile.
In addition to carbon steel, round steel can also be made of alloy steel. Alloy steel contains other alloying elements such as chromium, nickel, molybdenum, vanadium, etc., which can give the round steel special properties such as corrosion resistance, high - temperature resistance, and wear resistance. For example, chromium - nickel alloy steel round steel has excellent corrosion - resistant properties and is often used in the chemical and food industries.
Surface Quality
The surface of high - quality round steel should be smooth, without obvious cracks, folds, scabs, and other defects. A smooth surface is beneficial for subsequent processing and use, such as when it is used as a shaft and needs to be machined to fit bearings precisely.
Specific Uses of Round Steel
Construction Industry
As reinforcing bars in concrete structures: Round steel with a diameter of 6 - 25mm is widely used as reinforcing bars. For example, in building columns, beams, and slabs, the round steel reinforcing bars are placed inside the concrete to enhance the tensile strength of the concrete structure. The round shape helps in distributing the stress evenly and provides good bonding with the concrete.
For making structural components: Larger - diameter round steel can be used to make columns, trusses, and other load - bearing components in industrial buildings and large - span structures.
Mechanical Manufacturing
Shafts: Round steel is an ideal raw material for making shafts. The machined round steel shafts can be used in various machinery such as motors, pumps, and gearboxes. The accurate round shape ensures the smooth rotation of the shaft and the uniform distribution of torque.
Bolts and studs: Small - diameter round steel can be used to manufacture bolts and studs. After threading and heat - treatment processes, they are used to connect different components together, providing reliable fastening force.
Tool Manufacturing
Drill bits and taps: High - speed steel or carbide - tipped round steel can be used to make drill bits and taps. The round shape allows for easy grinding to form the correct cutting angles and flute shapes. These tools are used for drilling and threading holes in metal, wood, and other materials.
Energy and Power Industry
Transmission shafts in power plants: Round steel shafts are used to transmit power from the turbine to the generator. The high - strength and good - fatigue - resistance properties of the round steel ensure the stable operation of the power transmission system.
Support structures for power transmission towers: The round steel can be used to make the legs and cross - members of power transmission towers, providing the necessary strength and stability to support the overhead power lines.
