Round steel material:
Round steel materials are mainly divided into carbon steel and low alloy steel, such as Q195, Q235, 10 #, 20 #, 35 #, 45 #, Q215, Q235, 304, 316, 20Cr, 40Cr, 20CrMo, 35CrMo, 42CrMo, 40CrNiMo, GCr15, 65Mn, 50Mn, 50Cr, 3Cr2W8V, 20CrMnTi, 5CrMnMo, etc..
Calculation of the weight of round steel:
W (kg/m)=diameter mm * diameter mm * 0.00617.
Round steel refers to solid rectangular steel with a circular cross-section. The production material of round steel is generally made of first grade steel, which has very good plasticity. It is widely used in industry and less in construction projects, while threaded steel is widely used in construction projects. The specifications of round steel are mainly expressed in millimeters of diameter, for example, "50" represents a round steel with a diameter of 50 millimeters. The cross-sectional shape is shown in the figure.
Plain carbon round steel is used for structures with low tensile strength requirements, such as ordinary construction projects, standard parts, hot-rolled steel sections, etc; High quality carbon structural steel, with low content of harmful elements such as sulfur and phosphorus (≤ 0.035%). Among them, grades 08, 10, 15, 20, and 25 belong to low-carbon steel, which has good plasticity and is easy to draw, extrude, stamp, forge, and weld;
Medium carbon round steel, after quenching and tempering, can achieve excellent mechanical properties and is commonly used as important shafts, fasteners, etc;
High carbon round steel, used for making springs and wear-resistant parts;
Other alloy round steels, such as 20CrMnTi, are important carburized steels suitable for making important gears, etc. 27SiMn is a high-strength and easy to weld steel used in important areas that require welding. 35CrMo and 42CrMo are high-strength steels used for very important parts, such as engine connecting rod screws and cylinder head screws. Tire screws, etc. for heavy-duty vehicles.
5crMnMo large hot forging die steel, 20CRMnTi gear worm gear steel, 3cr2w8v precision hot forging die steel, 65Mn spring steel, Gcr15 bearing steel, 42crMo high-strength screw steel, 40Cr commonly used steel for shafts with small deformation after heat treatment, 45 commonly used steel is best cut, 20 commonly used steel for hammers, Q235 quenched ordinary steel.
The difference between round steel and other steel bars:
The appearance is different. Round steel has a smooth and round shape, with no lines or ribs. The surface of threaded steel has grooves or ribs, which results in a small bonding force between round steel and concrete, while threaded steel has a large bonding force with concrete. Therefore, round steel is generally used less in construction projects than threaded steel;
The composition is different. Round steel belongs to ordinary low-carbon steel, while threaded steel is mostly alloy steel;
The strength is different. Round steel has lower strength, while threaded steel has higher strength. Compared with threaded steel, round steel with the same diameter can withstand less tensile force. However, the plasticity of round steel is stronger than that of threaded steel, which means that round steel has greater deformation before being pulled apart, while other steel bars have much smaller deformation before being pulled apart.
