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The benefits of the cold rolled steel coils
DATE：1/24/2019 HIT：901 SOURCE： AUTHOR：
The hot rolled and cold rolled steel start out as large steel slabs .The basic difference between these two types of steel is one of process. As you can imagine, “hot rolling” refers to processing done with heat. “Cold rolling” refers to processes done at or near room temperature.Because of the different technological process, cold rolled steel has its unique advantages in some aspects.
Dimensional Accuracy – Cold Rolled Steel is more precise dimensionally than a hot rolled product created by the hot rolling process. The Cold Rolled Steel has already gone through the cooling process, which helps it remain closer to the finished dimension requirements. Improved Strength & Hardness – the cold rolling of hot rolled steel increases the strength and hardness while decreasing the ductility of the steel. When a metal is cold rolled, it is plastically deformed as it is forced between rolls. This deformation causes dislocations of atoms within the metal causing them to over-lap each other and increasing density. Increased density means greater metal strength and hardness. Superior Surface Finish – the finish on Cold Rolled Steel provides a uniform dull surface that is smoother than hot rolled and suitable for painting or lacquering.
Cold rolled or cold formed steel has a smooth, shiny finish with an oily texture that is free of rust or scale so it can easily be painted or chromed. The dimensions of the final product are more precise and square, with a sharper edge, and cold rolled steel sheet can hold tighter tolerances than hot rolled when machined or otherwise fabricated.