HOT / COLD rolled Coils

The difference between cold rolled steel and hot rolled steel is not the smelting process, but the rolling temperature, or the ending temperature of rolling mill. Hot rolled steel is easy to rolling with high efficiency of rolling, but because the oxidation of steel in hot rolling condition, the surface of hot rolled steel is black and gray. Cold rolled steel requires high power but low rolling efficiency. In order to eliminate work hardening ,cold rolled steel will need intermediate annealing, so the cost is higher, but the surface of cold rolled steel will be lighted in better quality. It can be directly used to process finished products, so the application of cold rolled steel plate is very wide.