Description

Round steel is a long, solid steel bar with a round cross-section.
Round steel is divided into hot rolled, forged and cold drawn three kinds. Hot rolled round steel is 5.****0 mm in size. Among them: 5.***5 mm small round steel is mostly supplied in straight strips in bundles, commonly used as steel bars, bolts and various mechanical parts; Round steel larger than *5 mm, mainly used for the manufacture of mechanical parts, seamless steel pipe billets, etc.
According to the use, it can be divided into carbon structural steel and carbon tool steel.
The carbon content of carbon tool steel is between 0.*5 and 1.*5%, and after heat treatment, high hardness and high wear resistance can be obtained, mainly used in the manufacture of various tools, cutting tools, molds and measuring tools (see tool steel).
Carbon structural steel is divided into 5 grades according to the yield strength of steel:
Q**5, Q**5, Q**5, Q**5, Q**5.
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