Classification by Rolling (Production) Process: Hot Rolling, Cold Rolling。

Hot Rolling: Hot rolling refers to rolling steel billets heated to a temperature of 1200℃~1300℃ into steel plates of the target thickness, followed by treatment at 500℃~700℃. Depending on surface conditions, it can form black skin steel coils and No.1 steel coils. Black skin steel coils are unprocessed hot-rolled coils without descaling treatment. No.1 steel coils are hot-rolled coils subjected to annealing and pickling; they are also called hot-rolled white skin steel coils due to their clean, bright surface. The thickness of hot-rolled stainless steel typically ranges from 3mm to 150mm.

Cold Rolling: Cold rolling is a process that further reduces the thickness of No.1 stainless steel to the target dimension at room temperature, followed by annealing, pickling and surface leveling. Common cold-rolled surface finishes include 2D, 2B, BA, 8K and 16K. Compared with hot rolling, cold-rolled stainless steel features more precise thickness, smooth and aesthetically pleasing surface, as well as excellent mechanical properties. The usual thickness of cold-rolled stainless steel is below 3mm.