China 0.4mm hot dipped galvanized steel coil

Hot dipped galvanized steel sheet & coil is made of carbon steel coated in zinc utilizing the hot-dip process. The end result of this process is a layer of zinc on each side of the steel sheet or coil that is tightly adhered to the steel through the formation of an iron-zinc alloy bonding layer.

For galvanized coils, the sheet steel is immersed in a molten zinc bath to make a sheet of zinc coated on its surface. It is mainly produced by continuous galvanizing process, that is, galvanized steel plate is made by continuously immersing the rolled steel plate in a plating tank with molten zinc.

Alloy galvanized steel sheet. This kind of steel plate is also produced by hot dip method, but immediately after it is out of the tank, it is heated to about 500 ℃ to form an alloy film of zinc and iron. This galvanized coil has good paint adhesion and weldability.

Galvanized Coil Coating:

(1) Normal spangle coating

During the normal solidification process of the zinc layer, the zinc grains grow freely and form a coating with an obvious spangle shape.

(2) Minimized spangle coating

During the solidification process of the zinc layer, the zinc grains are artificially restricted to form the smallest possible spangle coating.

(3) Zinc-free coating

The coating obtained by adjusting the chemical composition of the plating solution has no visible spangle morphology and a uniform surface.

(4) Zinc-iron alloy coating

Heat treatment of the steel strip after passing through the galvanizing bath to form an alloy layer of zinc and iron throughout the coating. A coating that can be painted directly without further treatment other than cleaning.

(5) Differential thickness coating

For both sides of galvanized steel sheet, coatings with different zinc layer weights are required.

(6) Smoothing

Skin-passing is a cold-rolling process performed on galvanized steel sheets with a small amount of deformation for one or more of the following purposes.

Improve the surface appearance of galvanized steel sheet or be suitable for decorative coating; make the finished product not see the phenomenon of slip line (Lydes line) or crease during processing to minimize temporarily, etc.

FAQ：

Q:What kind of work does your company do?

A:We are a business steel industry and trade. We mainly produces galvanized steel plate/pipe/coil/round bars,etc.

Q:What are the advantages of your company?

A:(1): Prime quality and reasonable price.

   (2): Wide excellent experiences with after-sale service.

   (3): Every process will be checked by responsible QC which insures every product's quality.

   (4): Professional packing teams which keep every packing safely.

   (5): Samples can be provided as your requirements.

Q: What is your terms of payment ?

A: Can be negotiated by both parties. If you have another question, pls feel free to contact us as below

Q: What about your price?

A: Our price is very competitive.

     Pls feel free to contact us if you are interested in our products.

Q: How long is your delivery time?

A: Stock steel/Steel for simple cutting/Small amount of general standard steel: about 5-20 days for delivery; Custom steel/bulk steel: about 15-30 days for delivery. Contact us for specific delivery times.