Cold-rolled steel and hot-rolled steel

Both hot rolling and cold rolling are the processes of forming steel plates or profiles, which have a great impact on the structure and properties of steel.

The rolling of steel is mainly hot rolling, while cold rolling is usually only used to produce small size steel and accurate size sheet.

Ordinary cold rolling and hot rolling of steel:
Wire rod: 5.5-40mm in diameter, rolled, all hot-rolled. After cold drawing, it belongs to cold drawing material.

Round steel: in addition to the bright materials with precise dimensions, it is generally hot-rolled, and there are also forged materials (with forging marks on the surface).

Strip steel: hot rolled and cold rolled, cold rolled products are generally thin.

Steel plate: cold rolled plate is generally thin, such as automobile plate; There are many hot rolled plates, some of which have the same thickness as cold rolled ones, and their appearance is obviously different.

Angle steel: all hot rolled.

Steel pipe: welding, hot rolling, cold drawing.

Channel steel and H-beam: hot rolled.

Steel bar: hot-rolled material.