High quality carbon steel bar quality carbon steel round bar quality carbon structural steel high-quality carbon steel round bar quality carbon steel carbon steel high quality carbon steel round bar quality carbon steel bar quality carbon structural steel, carbon steel round bar of quality high-carbon steel round bar high-quality carbon structural steel carbon steel round bar quality carbon structural steel high quality carbon steel round bar refers to the circular cross-section solid strip steel. The specifications of a few millimeters in diameter, such as "50" means that 50 mm diameter round bar. Round is divided into hot-rolled, cold-forging and drawing three. Hot rolled round steel specifications for the 5.5-250 mm. Where: 5.5-25 mm round mostly small straight bundles supply, commonly used for steel, bolts and various mechanical parts; greater than 25 mm round steel, mainly used in the manufacture of mechanical parts or as a seamless steel billet round Other steel and differences: 1 is not the same shape, round shape light circle, no pattern without ribs, other steel surface has sculptured shape or ribs, thus causing a small bar and concrete adhesion, and adhesion to other large steel and concrete. Two ingredients are not the same, round (one 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 bar, round bar can withstand tensile steel than other small, round plastic but stronger than other steel that bar before pulled off a larger deformation, while other steel pulled off before deformation is much smaller.