Hot rolled round steel
Bonded steel is alloy steel, as long as it contains a certain proportion of alloy components are generally called bonded steel or alloy steel. Hot rolling is a processing method at the factory. Hot rolling: It is necessary to heat the material during or before steel rolling. Generally, rolling should be heated above the recrystallization temperature. Such as: more than 1000 degrees, hot rolling is processed at high temperatures. Recrystallize the inside of the steel. To make it better. But hot rolling does not change the structural properties of the metal. Hot-rolled steel is the steel rolled by high temperature heating, its strength is not very high, but enough to meet our use, its plasticity, weldability is good, so we are more commonly used; Cold rolled steel is ordinary hot rolled steel through strong hot rolled steel.
The specification of hot-rolled round steel is 5.5-250 mm, of which 5.5-25 mm small round steel is mostly supplied in straight strips in bundles, commonly used as steel bars, bolts and various mechanical parts: hot-rolled round steel greater than 25 mm is mainly used for manufacturing mechanical parts or seamless steel billets. The steel that is drawn beyond the strain hardening stage has high strength, but the toughness and weldability are poor, relatively hard and brittle, and is mainly used for manufacturing mechanical parts or seamless steel tubes. It belongs to construction steel.
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