Galvanized Steel Coils Manufacturer in China
  • We can produce 0.13-0.8 mm galvanized steel coils.
  • 20-120g/m2 zinc coating is more common.
  • ASTM A653 standard.
  • MOQ: 25 ton.

Galvanized Steel Coil

COSASTEEL is a China manufacturer of hot-dip galvanized steel coils. 

Our factory has two galvanized coil production lines with an annual output of 300,000 tons, which can meet fast delivery.

COSASTEEL can produce ASTM A653 DX51D galvanized steel coil suitable for cold forming.

We have sufficient galvanized steel coil stock for fast delivery.

Product name Galvanized Steel Coil
Material ASTM A653, DX51D, Q195
Zinc Coating 20-120g/m2
Thickness 0.13-0.8 mm
Width 600-1250 mm
Coil ID 508/610mm
Coil weight 3-8 tons
Surface Structure Mini/Big Spangle
Surface Treatment Anti-Finger printing ,Chromated, oiled/ non-oiled
Package standard export package (Detailed picture is as follows)
Hardness soft (normal), hard, full hard(G300-G550)
HS code 721049
Brand name COSASTEEL
Country of origin China
Business type Supplier and manufacturer

Want to Purchase Galvanized Steel Coils? Quote Now! Free Samples.

Fast delivery of high-quality hot-dip galvanized steel coils

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.

Hot-dip galvanizing is the process of applying a protective zinc coating to a steel sheet or iron sheet, to prevent rusting.

  • Excellent anti-corrosion, paintability, and processability due to the self-sacrificing characteristic of zinc.
  • Available to select and produce the desired amount of zinc gilded and in particular enables thick zinc layers(maximum 120g/m2).
  • Classified as either zero spangle or extra smooth depending on whether the sheet undergoes skin pass treatment.

Surface Finish

Surface Structure Mini Spangle Big Spangle
Weight of zinc coating Zinc > 20g/sm Zinc > 30g/sm
Surface Finish

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

Galvanized Coating Layer

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

Galvanized FAQ

What is Hot Dipped Galvanized Steel

Hot Dipped Galvanized Steel Sheet in Coil is cold rolled steel coil coated with zinc on two sides by a continuous hot-dip process. This method tightly adheres the coating to the steel with an iron-zinc alloy bonding layer formed by a diffusion process while the heated steel strip is in contact with the molten zinc. One of the drawbacks of Galvanized is that if the Zinc coating is scratched off the steel, the Steel is left unprotected, and is subject to failure.

Hot Dipped Galvanized Steel Coils Prices

The prices of hot-dipped galvanized steel coils depend on zinc thickness, steel coil thickness, packing method. If you want to buy cheap galvanized steel coils, please choose 20 grams of zinc coating/㎡, a steel coil of 0.8mm thickness, and simple packaging. please visit Color Coated Steel Coil Price: Factors Affecting.

Type of Galvanized Spangle

Galvanized with regular spangle, zinc-coated from 30g to 275g(g90). thickness from 0.15mm to 2.0mm. Regular spangle galvanized can be used in hot and wet outdoor places. For example fence, roofing, garage door, etc.

Galvanized with zero spangles, this kind of GI with brightly surface, zinc-coated from 30g to 2755g(g90). thickness from 0.12mm to 0.25mm. It could be used outdoor also. Currently mainly exported to Southeast Asia and Africa. It is cheaper than gi with regular spangle. This product can be processed later, for example, processed into stone coated tiles.

How long the service life of regular spangles and zero spangles galvanized?

Service life depends on the Scope of application. Normally 5-10years without zinc dropping. If the incision is processed, then the useful life more than 10years.

Galvanized steel coil could be oiled?

Yes, it could be oiled. 8-20g per square meters. Oiling can prevent the oxidation of galvanized sheets in a short time.

What is the ASTM A653 standard?

ASTM A653 is a kind of American standard. Equal Chinese Q195 or SGCC.

Do you accept the test of zinc coating or not?

Yes, accept the test of zinc coating. We could send galvanized steel coil samples to the laboratory that the clients required. Or Chinese SGS.

Product Profile
Aggregate Rating
3.5 based on 3 votes
Brand Name
Product Name
Galvanized Steel Coil Sheet
USD 850
Product Availability
Available in Stock
Related Products

Galvanized Steel Coil

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

PPGL Steel Coil

PPGL Coil uses DX51D+AZ, and q195 and galvalume steel sheet as the substrate, PE coating is our most commonly produced, it can be used for up to 10 years.

Prepainted Steel Coil

PPGI Steel Coil Specification PPGI Coil Price Reference The prepaint galvanized steel coil prices keep changing, which is calculated based on raw material(Hot rolled sheet),