Hot rolled flat steel and cold-rolled flat steel

Cold rolled plate
1. The surface of cold-rolled sheet has a certain glossiness, which feels relatively smooth to the touch, similar to the common steel water cup used for drinking water
2. If hot-rolled plates are not pickled, their surfaces are similar to many ordinary steel plates on the market, with rusted surfaces appearing red and non rusted surfaces appearing purple black (oxide scale). The performance advantages of cold-rolled and hot-rolled plates are:
(1) Higher precision, the thickness difference of cold-rolled strip steel does not exceed 0.01~0.03mm
(2) Thinner size, the thinnest cold-rolled steel strip can be rolled to 0.001mm;

Hot rolled plate
Hot rolling can now achieve a minimum thickness of 0.78mm. The surface quality is superior, and cold-rolled steel plates can even produce mirror surfaces; The surface of hot-rolled plates has defects such as iron oxide scale and pitting. Hot rolled plates and cold-rolled plates can be customized according to user requirements, and common hot-rolled plate materials include Q235 Q195 SPHC
Cold rolling and hot rolling are two different rolling techniques. As the name suggests, cold rolling is the process of making steel at room temperature, which has high hardness. Hot rolling is the process of making steel at high temperatures.