Carbon steel plate is a flat steel made of carbon steel (carbon content 0.02%~2.1%) as the main material through hot rolling or cold rolling process. It has high strength, good mechanical properties and processing performance. According to the carbon content, it can be divided into low carbon steel (such as Q235), medium carbon steel (such as 45# steel) and high carbon steel (such as T8). The thickness ranges from 0.5mm to 300mm and the width can reach 3000mm. It is widely used in construction, machinery, ships and other fields.