Galvanized Steel Coils

Galvanized Steel Coil Supplier

Brother Steel is one of the best galvanized steel coils supplier and manufacturer in China, Our galvanized steel coil production line has an annual production capacity of 300,000 tons and a manufacturing speed of 150m/min. We can manufacture and sell galvanized steel coils with a width of 800-1250mm and a coating weight of 60-300g/m3. We manufacture galvanized steel coils according to EN 10346, ASTM A653 standard. We have sufficient galvanized steel coil stock for fast delivery.

Hot Dipped Galvanized Steel Sheet in Coil (GI) is produced by passing the Full Hard sheet which has undergone the acid washing process and rolling process through the zinc pot, thereby applying zinc film to the surface. It has excellent corrosion resistance, paintability, and workability due to Zinc’s characteristics. Usually, hot-dipped galvanized steel sheet and galvanized steel coil process and specifications are basically the same.

Surface Structure

Spangled galvanized steel sheet is the spangle obtained by the condensation of the zinc coating under normal conditions after galvanizing. It is mainly used in buildings and other places where there is little direct contact with the human body.

Galvanized steel sheets without spangles are mainly produced through a special production process to control the lead in the zinc pot to a certain level, or after the strip steel is out of the galvanized pot, it undergoes special treatment to control the spangles to less than a certain level. Mainly used in home appliance housing

Hot Dipped Galvanized Steel Coil&Sheet Production

The manufacturing of galvanized steel coil&sheet with good weather resistance, primarily used in construction.

Galvanized steel coils production process:

1. Uncoiler
   
2. Welder
   
3. Entry Looper
   
4. Pre-treatment
   
5. Annealing Furnace
   
6. Zinc Pot
   
7. Cooling Tower
   
8. Water Quench Tank
   
9. Skin Pass
   
10. Tension Leveler
    
11. Passivation Coater
    
12. Exit Looper
    
13. Recoiler
    
    

The production and processing of galvanized steel coils can be divided into three steps: first, the entire coil is pickled to remove rust and dirt, so that the surface of the galvanized steel strip can achieve a bright and clean effect; after pickling, pass ammonium chloride or zinc chloride It is cleaned in an aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the hot-dip plating tank for the galvanizing process; after the galvanizing process is completed, it can be put into storage and packaged.

Surface Treatment Of Galvanized Steel Coil

Chromate treatment of galvanized steel coils is also called passivation treatment. Through passivation treatment, the surface structure and gloss of the galvanized layer can be improved, the corrosion resistance and service life of the galvanized layer can be improved, and the bonding force of the coating and the base metal can be improved.

The purpose of oiling galvanized steel coils is a protective layer is formed on the surface of the steel coil to prevent the surface from rusting.

Galvanized Coating Layer

• Anti-Finger printing ,Chromated, Oiled/ non-oiled
  
• Zn Plating Layer (20-120g/sm)
  
• Cold Rolled Steel Sheet
  
  

European EN 10346 Standard Galvanized Steel Coil

Low carbon steel for cold forming (DX51D – DX54D)

• DX51D is equivalent to Commercial Steel, curved and profiled
• DX52D is equivalent to Forming Steel
• DX53D is equivalent to Deep Drawing Steel
• DX54D is equivalent to Extra Deep Drawing Steel
  

Structural Steels (S220GD – S350GD)

S220GD,S250GD,S280GD,S320GD,S350GD

Use structural steel for high load-bearing capacity, with a yield strength of 220-350

Galvanized Steel Coil Uses

Galvanized steel coil has a wide range of applications, and its advantage is that it has a long anti-corrosion period. It is mainly used for home appliances, office panels, roof sheets, automotive panels, construction and substrate of prepainted steel coils.

Car board

The use of automotive plates must first be stamped and formed, and the steel plate is stamped into the required shape and size of the part.

Then spot welding, as an important welding method for thin plate connection, has a wide range of applications in the manufacturing industry, especially in the automotive industry.

Galvanized roof sheet

The performance requirements of galvanized roof panels mainly include the mechanical properties of the material (tensile strength, yield strength, elongation), coating performance (coating type, coating thickness and coating adhesion)

Home appliance office board

Including air conditioners, washing machines, refrigerators, photocopiers, etc., household galvanized sheets are mainly used for general forming applications and stamping.

Substrate

Another use of galvanized steel coils is to be used as the substrate of prepainted steel coils. prepainted steel coils have polyethylene coatings than galvanized coils and are more durable.