Surface treatment symbol | Processing state | Uses |
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No.1 | Heat treatment, pickling, or equivalent treatment after hot rolling. | Heat-resistant industries that do not pay much attention to surface smoothness treatment, such as chemical tanks. |
2B | After cold rolling, heat treatment, pickling, etc., then skin passed Smooth surface. | Bright and smooth finish. Easily re-grinded to make it brighter. Used in a wide range of applications, including hospital medical equipment, milk pails, tableware, and construction materials. |
BA | After cold rolling, bright annealed and skin passed. Smooth, bright, and reflective surface. | Kitchenware, tableware, electrical appliances, medical equipment, paper glazing, architectural decoration, etc. |
NO.4 | Grinding with abrasive belts with a particle size above 180#. | High-level processing is both hygienic and clean, suitable for milk product processing equipment, medical equipment, building decoration and other uses. |
HL(Hair Line) | Grinding materials with appropriate granularity for continuous stripe grinding. | Mostly applied in architectural decoration with very wide applications (such as elevators, escalators, door surface). |
SH | After cold rolling, no annealing or pickling Harder surface. | High hardness and good elasticity, suitable for spring sheets or electronic parts. |
NO.8 | Moderate grinding after cold rolling. | Mostly applied in architectural decoration with very wide applications (such as elevators, escalators, door surface, reflectors). |