They refer to different categories of surface treatment processes for cold-rolled stainless steel coils. Among them, the formation of 2B is cold rolling--annealing and pickling--flattening, and the formation of BA is cold-rolling--bright annealing-flattening. The main difference is annealing The process is different, 2B is annealing and pickling, the surface is oxidized to a certain extent, and it is darker; BA is bright annealing, the surface is not oxidized, and it is brighter.
