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Galvanized Sheet coil manufacturer

Jiangsu Taigang Puxin Stainless Steel Co., Ltd. is a sophisticated manufacturer of steel products. It’s located in Wuxi, which is the biggest base of stainless steel products in China and is also near to Shanghai. We have been devoted in steel industry for nearly 15 years and developed many faithful clients in Europe, South America, Mid-East, India and etc. We have a wide range of stainless steel products. Other metal products are also available if customers require. The annual export volume is about 1000,000 tons. And we promised almost all inquiry will be dealed with within 3 hours. "Punctuality,Integrity, Humanization service” has always been the development principle that strictly adhered by our company and all stuff all the time.At present, we have five finishing rolling production lines and two hot rolling production lines . Further more advanced automatic width control system (AWC), automatic thickness control system (AGC), bending roll system, work roll channeling roll system and other effective measures are adopted to guarantee product quality.

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.

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Introduction of  Galvanized steel coil

Certifications:ISO 9001,SGS,BV
Payment Term:T/T, L/C, WeChat pay, Alipay, etc
Our Own Factor:Competitive price and quality
Quick delivery and standard exporting package OEM/ODM

Standard Specification Of Galvanized steel coil

Thickness

0.12-6.0mm

Width

600-1250mm

Length

Coil or as Customers' requirement

Surface

Chromated and oiled, and ant-ifinger      

Finish

Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)

 Application

Structural use ,roofing, corrugated roofing, commercial use, household appliance, industry

Galvanized steel coil grade

 GradeJIS G3302-94 Q195, Q235,Din17175
SGCC, SGCH,SGC340 SGC400 SGC440 SGC490 SGC570 
SGHC SGH340 SGH400 SGH440 SGH490 SGH540
DX51D DX52D DX53D DX54D
S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD

American ASTM A653 Standard Galvanized Steel  Coil

Commercial Steel (CS Types A, B, and C)

Commercial Steel is a low-carbon cold-formed steel, such as galvanized steel roof forming

Forming Steel (FS Types A and B)

Requires higher drawability than Commercial Steel, such as for lamp cover forming

Deep Drawing Steel (DDS)

Extra Deep Drawing Steel (EDDS)

Structural Steel (SS) – (33,37,40,50,80)

High Strength Low Alloy Steel (HSLAS)

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

Common types of galvanized steel coil

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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

Surface treatment typeCodeFeature
Chromic acid treatment CGood corrosion resistance, suitable for bare state
Chromic acid treatment + oiling SGood corrosion resistance
Phosphoric acid treatment (including sealing treatment) PA certain degree of corrosion resistance, good paint performance
Phosphoric acid treatment (including sealing treatment) + oiling QIt has certain corrosion resistance, good paint performance, and prevents rust during transportation and storage
Phosphoric acid treatment (excluding sealing treatment) TA certain degree of corrosion resistance, good paint performance
Phosphoric acid treatment (excluding sealing treatment) + oiling VHave certain corrosion resistance, good paint performance, and prevent rust
OiledPrevent rust during transportation and storage
No treatment MSuitable for immediate painting

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.


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