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Electroplated chromium plate, also known as tin free steel, abbreviated as TFS, is an abbreviation of the English word Tin Free Steel. It is a product developed to reduce the use of tin, which is relatively scarce and expensive in the world, and to reduce the cost of making cans.

The surface state of tin free steel is divided into bright surface, silver surface, and stone surface. Bright finish surface with the unique luster of metallic chromium, suitable for ordinary cans; The stone surface is finely polished and has a special luster, suitable for the bottom cover of round cans;

Tin free steel sheets are generally used to produce crown caps and the bottom of regular cans due to their difficulty in welding