Bright Chromated Hot Dipped Galvanized Steel Coils 40–450g/m² Zinc Coating for

Product Specification

Bright Chromated Hot Dipped Galvanized Steel Coils 40–450g/m² Zinc Coating for Construction and Industrial Fabrication

１．Product Overview

Hot dipped galvanized steel coils are designed for applications requiring corrosion protection, dimensional consistency, and long-term durability. The product is widely used in construction, automotive manufacturing, machinery production, container fabrication, shipbuilding, and general industrial processing.

Produced through a continuous hot-dip galvanizing process, the steel substrate is coated with zinc to create a protective barrier against atmospheric corrosion. The available zinc coating range from 40g/m² to 450g/m² allows selection according to service environment and expected service life.

２．Technical Solution

The steel coil is immersed in molten zinc to form a metallurgically bonded coating layer. Compared with uncoated carbon steel, galvanized steel provides improved resistance to moisture, oxidation, and outdoor exposure.

Chromated and oiled surfaces are commonly selected for enhanced storage protection and transportation stability. Bright and dry surfaces are suitable for applications requiring further processing, painting, profiling, stamping, or roll forming.

Regular spangle and zero spangle finishes allow users to select either traditional galvanized appearance or a smoother surface for painting and decorative applications.

３．Specifications

４．Application

The product is widely used for roofing sheets, wall panels, steel structures, purlins, ducts, cable trays, garage doors, fencing systems, container manufacturing, agricultural equipment, vehicle components, machinery housings, and shipbuilding parts.

It is also commonly processed into galvanized sheets, corrugated roofing products, structural profiles, and industrial fabrication components.

５．Processing

The coils can be processed through slitting, cut-to-length production, roll forming, stamping, bending, profiling, punching, and welding operations.

Both 508mm and 610mm coil IDs are compatible with most industrial decoiling and processing lines. Standard seaworthy export packaging helps reduce the risk of moisture exposure during international transportation.

６．Advantages

• High zinc coating availability supports different corrosion protection requirements.
• 0.12–4.0mm thickness range covers light-gauge and heavy-duty industrial applications.
• 600–1500mm width range supports roofing, cladding, fabrication, and manufacturing industries.
• Chromated and oiled finishes provide additional storage and transportation protection.
• Regular and zero spangle options support different appearance requirements.
• Maximum coil weight of 13MT improves production efficiency for large-volume processing.

７．How to Choose

• For roofing and wall cladding applications, select zinc coatings according to environmental exposure conditions.
• For outdoor structural applications, higher zinc coating levels are generally preferred.
• For painting and decorative products, zero spangle surfaces are commonly selected.
• For storage before processing, chromated or oiled surfaces provide additional protection.
• For automated production lines, confirm coil ID, coil weight, and width compatibility before ordering.

８．FAQ

Q1．What zinc coating range is available?

The available zinc coating range is 40g/m² to 450g/m².

Q2．What surface treatments can be supplied?

Chromated, oiled, bright, and dry surface treatments are available.

Q3．What coil IDs are available?

Standard coil IDs are 508mm and 610mm.

Q4．What industries commonly use galvanized steel coils?

Construction, automotive, machinery manufacturing, container production, shipbuilding, and industrial fabrication are common applications.

Q5．Can the product be supplied with different spangle types?

Yes. Both regular spangle and zero spangle surfaces are available according to application requirements.