A steel coil is a finished sheet or strip of steel that has been rolled or coiled so that the width of the sheet is greater than its thickness. Steel coils with certain coatings are weather resistant, moisture resistant and environmentally friendly. Depending on the desired result, steel coils are produced by different processes.
Hot-rolled steel coils are steel sheets that have been rolled at high temperatures, making the steel easier to handle. Due to the quick and easy process, hot rolled steel saves time and is less costly to manufacture.
Cold rolled steel coils have a better finish and are more durable than hot rolled steel. Cold rolling is a process where steel is rolled at room temperature, below its recrystallisation temperature. Although cold rolled steel coils are superior to other coils, they are more difficult to handle due to their higher carbon content.
Galvanised steel coils are made by the hot dipping process, which immerses the metal in zinc to obtain a nice smooth coating. This coating is highly resistant to rust and extends the life of the steel coil.
Cold Rolled Steel Coils
Galvanised steel coils are produced by a hot dipping process, similar to galvanised steel, in which the metal is dipped into a liquid bath of zinc alloy and then heat treated in-line. Galvanised steel is usually thinner and easier to evaluate than other processes.
Printing steel coil is a product based on metal sheet, of which surface is firstly covered with coating and printing ink, and finally covered by the plastic film (PVC, PE). The coated layers of printing steel plate consist of chemical plating--- primer layer, pattern printed layer, and filming cover. The top and back coatings shall be generally weather resistant coatings, and coatings with special functions, such as stain resistant, self-cleaning, high heat resistance, antistatic, sterilization, anti-fingerprint and etc.
