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Steel Materials

Cold rolled steel is a mill product produced from a hot-rolled pickled coil that has experienced substantial cold reduction at room temperature. The usual end product is characterized by improved surface, greater uniformity in thickness, and improved mechanical properties as compared with hot-rolled sheet. This occurs when the metal below its re-crystallization temperature, which increases the strength via strain hardening up to 20%.

Cold rolled steel in normally available in four types: commercial steel, drawing steel, extra deep drawing steel, and extra deep drawing steel plus. Drawing steels are more ductile.
Galvanized steel is steel that has gone through a chemical process to keep it from corroding. The steel gets coated in layers of zinc oxide because this protective metal does not get rusty as easily. The coating also gives the steel a more durable, hard to scratch finish that many people find attractive. For countless outdoor, marine, or industrial applications, galvanized steel is an essential fabrication component.
One of the most common ways of making steel resist rust is by combining (alloying) it with a metal that is less likely to corrode: zinc. When steel is submerged in melted zinc, a chemical reaction permanently bonds the zinc to the steel.
PPGI is pre-painted galvanized iron, also known as pre-coated steel, coil coated steel, color coated steel etc, typically with a hot dip zinc coated steel substrate. Prepainted Galvanized Steel
The term is an extension of GI which is a traditional abbreviation for Galvanized Iron. Today the term GI typically refers to essentially pure zinc (>99%) continuously hot dip coated steel, as opposed to batch dip processes. PPGI refers to factory pre-painted zinc coated steel, where the steel is painted before forming, as opposed to post painting which occurs after forming.
Corrugated Sheet is made up of color coated sheet, galvanized sheet, and other metal steel sheet after rolling cold bending into a variety.

Advantages: a) attractive and innovative appearance, rich colors, decorative, flexible combination, can express a different architectural style; b) light weight, high mechanical properties; Application: a) industry and civil building, warehouse; b) steel structure house and mobile house, roof and interior & exterior decoration etc. for more details at Corrugated Color Steel Sheet

Tinplate,   thin steel sheet with a coating of tin applied either by dipping in molten metal or by electrolytic deposition; almost all tinplate is now produced by the latter process. Tinplate made by this process is essentially a sandwich in which the central core is strip steel.
This core is cleaned in a pickling solution and then fed through tanks containing electrolyte, where tin is deposited on both sides. As the strip passes between high-frequency electric induction coils, it is heated so that the tin coating melts and flows to form a lustrous coat. The end product has a tin...

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