DX51D SGCC Coating Cold Rolled Galvanized Coil Stock Chromed Surface

  Galvanized coil: a thin steel sheet that immerses the steel sheet into the molten zinc bath to make its surface adhere with a layer of zinc. It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in the zinc melting bath to make galvanized steel plate; Alloyed galvanized steel sheet. This kind of steel plate is also made by hot dip method, but it is heated to about 500 ℃ immediately after coming out of the groove to form an alloy coating of zinc and iron. The galvanized coil has good coating adhesion and weldability.

  The material of dx51d galvanized sheet is a non-ferrous alloy composed of zinc as the matrix and adding other elements. The main alloying elements are aluminum, copper, magnesium and so on. Zinc alloy has a low melting point, good fluidity, is easy to be plastically processed and welded, and is resistant to atmospheric corrosion. According to the manufacturing process, it is divided into cast zinc alloy and deformed zinc alloy. Commonly used cast zinc alloys are zinc-aluminum-copper-magnesium alloys, which have good casting process performance, and the cooling rate has little effect on mechanical properties. They are mostly used in the manufacture of mechanical parts, toys, decorations, household appliances, etc. Commonly used wrought zinc alloys are zinc aluminum alloy and zinc copper alloy. The former contains 4% to 15% of aluminum. In order to improve the strength and hardness of the alloy, a small amount of alloying elements such as copper and magnesium are also added. It has high strength and is easy to shape, and can replace some brass or duralumin to make precision forgings. The latter contains 0.7% to 1.5% of copper. Copper can increase alloy strength and impact toughness, and reduce plasticity. Zinc-copper alloy is suitable for making daily hardware products or replacing part of brass. In addition, there are zinc-titanium-based, zinc-lead-cadmium-iron-based deformed zinc alloys. The supply status of wrought zinc alloy is wire, plate, forging or extrusion, etc.