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Description
Hot Dip Galvanized Steel Coil is produced by passing Cold Rolled Steel Coil through a Molten bath of Zinc at temperatures of around 460 degrees Celsius. The Zinc coating on the steel coil substrate acts as a barrier between the atmosphere and the surface of the metal. Further, due to its lower chemical potential as compared to Iron (Fe), it is attacked and dissolved first, thereby offering superior corrosion resistance (cathodic protection).
ASTM A 653/A 653M is a standard specification for hot-dip galvanized steel coils. It sets the requirements for the composition and quality of the zinc coating to ensure consistent performance and durability.
The Zinc Coating Mass Range of SISCO steel is between 40 gsm – 360 gsm (grams per square meter of sheet metal).
The Surface Finish & Visual Appearance of the Zinc coating of Gi Coils can be:
- Regular Spangle
- Minimized or Minimal Spangle
- Zero Spangle (Extra Smooth)
Zinc Coated Steel Coil/Sheet (Galvanized Steel Coil)
| Application | Building Roofing/Window, Automobiles, Color Coated Base Sheet etc. |
|---|---|
| Standard |
ASTM A653/A653M This is the American standard for cold rolled hot dip galvanized steel materials. JIS G 3302 This is the Japanese material standard associated with hot dipped galvanized steel coils. BS EN 10346:2009 (Supersedes BS EN 10327:2004 & BS EN 10326:2004) This is the European material standard for Continuously hot-dip coated steel flat products. |
| Grade | DX51D, DX52D, DX53D, DX54D S220GD, S250GD...S550GD |
| Surface | Oiled, Chromated, Dry + Chromated, Anti-Finger |
| Zinc Coat Weight | 40-350 g/m² |
| Internal Dia. | 508 / 610mm |
| Coil Weight | 3-7 Tons |
| Size | Thickness: 0.1-1.5mm Width: 600-1500mm |
Production Process
Frequently Asked Questions
What is Hot Dip Galvanized Steel Coil?
Hot Dip Galvanized Steel Coil is manufactured by passing cold rolled steel coil through a molten bath of zinc at approximately 460 degrees Celsius. This process creates a protective zinc barrier that offers superior corrosion resistance.
What standards apply to these galvanized steel coils?
The steel coils comply with major international specifications, including ASTM A653/A653M (American standard), JIS G 3302 (Japanese standard), and BS EN 10346:2009 (European standard).
What is the range of zinc coating weight available?
The zinc coating mass range for SISCO steel ranges from 40 gsm to 360 gsm (grams per square meter of sheet metal), depending on custom requirements.
What are the available surface finishes for Gi Coils?
Gi Coils are available in three distinct surface finishes: Regular Spangle, Minimized (or Minimal) Spangle, and Zero Spangle (Extra Smooth).
What are the typical applications of galvanized steel coils?
They are widely used in building roofing and windows, automotive manufacturing, and as the base sheet for color-coated steel products.
What size specifications can be customized?
The thickness ranges from 0.1mm to 1.5mm, and the width ranges from 600mm to 1500mm. The internal coil diameter is 508mm or 610mm with weights ranging from 3 to 7 tons.