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Equal thickness tinplate is a cold-rolled tinplate with the same amount of tin plating on both sides. Tin plated sheet is made by rolling low carbon steel, followed by acid washing, cold rolling, electrolytic cleaning annealing, leveling, edge cutting processing, and then cleaning, electroplating, softening, passivation treatment, and oil coating before cutting into finished tin plated sheet metal.
Tin Free Steel (TFS) is produced by applying electrolytic chromic acid treatment over steel sheets. This steel product was developed to meet economic requirements, and excels tinplate in paintability, paint adhesion, and economy. It is widely used for making beverage cans and 18-liter cans.
Lead increases the machinability of brass as well as increasing its strength and resistance to corrosion. The addition of lead also seals shrinkage pores to provide pressure tightness. Brasses can contain up to 3.5 percent in lead contents, and are classified as low, medium, or high-leaded.
C24000 brass with a nominal composition of 80 % copper and 20 % zinc approaches the mechanical properties of CuZn30 but with corrosion properties only slightly inferior to CuZn15. This alloy has a color between yellow and golden red and finds distinctive uses in decorative trim applications.
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