The difference between cold-rolled sheet and strip
Cold-rolled plate: high strength, high hardness, high surface finish, usually thin, can be used as a drawing board.
Hot rolled plate: relatively low strength and poor surface quality (oxidation, finish), but the plastic is good, generally for medium and heavy plate.
Cold-rolled sheet surface has a certain gloss hand is smooth to the touch, similar to the kind used for drinking is very common in molten glass, cold rolled high with sclerosis denaturalization, processing is relatively difficult, but difficult to deformation, high strength. Cold-rolled steel sheet, as part of work hardening, low toughness, but it can achieve better yield than used to cold-formed parts such as springs, and because the yield point is closer to the tensile strength, so use of risk there is no predictability in the process, prone to accidents in the load exceed the permissible load.
Hot-rolled plates without pickling, and is similar to many common plate surface on the market, a rusty surface is red, no rusted surface for the purple-black (iron oxide). Cold-rolled high with sclerosis denaturalization, processing is relatively difficult, but difficult to deformation, high strength. Hot-rolled steel plate, mechanical properties are far less cold, also in forging and processing, but with good toughness and ductility.