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PICKLING
The hot-rolled coil passes through pickling line, where hydrochloric acid solution is used to remove surface scale for its smooth surface finish before further processing.


COLD-ROLLING
Pickling coils are rolled in the tandem cold rolled mill where they are processed into specified thickness. The critical point at this stage is to maintain uniform and precise flatness throughout the entire length of the coil. The rolling process is automatically controlled by the latest computer technology.

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ELECTROLYTIC CLEANING
The main purpose of electrolytic cleaning is to remove the lubricant oil and dirt left on the cold rolled strip before annealing. Every trace of surface oil is removed by using the mechanical and chemical reactions while the cold rolled coil passes through alkaline solution.


ANNEALING
After cold-rolling, the steel strip is hard and brittle with its grains elongated in the rolling direction. To obtain the mechanical properties, the strip is passed through the furnace, the heating, soaking and cooling sections. By various heat cycles, extra deep drawing quality and high tensile strengthen steel can also be produced. There are normally two annealing types, that is batch and continuous annealing line has superior productivity.

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FINISHING & INSPECTION
Production thickness, width and surface quality are checked during this stage. Product samples are also sent to the laboratory to test for mechanical properties, etc,…Oil is also applied to the product to prevent rust and they are packed for shipment.