Spangle Surface Hot Dipped Galvanized Steel Coil with 750–1250mm Width and 60–275g/m² Zinc Coating for Construction Applications

1. Product Overview

Hot dipped galvanized steel coil is produced by applying a zinc coating to carbon steel substrate through a continuous hot galvanizing process. The zinc layer improves corrosion resistance and helps extend service life in construction environments where roof panels, wall systems, and steel structure components are exposed to moisture and outdoor conditions.

This product focuses on construction-oriented supply with width options from 750 mm to 1250 mm and zinc coating from 60 g/m² to 275 g/m². Surface condition can be selected as regular spangle, zero spangle, or mini spangle depending on appearance and downstream processing requirements.

2. Technical Solution

Product performance is based on the following technical characteristics:

• Continuous hot dip galvanizing process for stable coating adhesion
• Zinc coating acting as barrier protection and sacrificial protection
• Construction-grade width range suitable for roofing and panel fabrication
• Selectable spangle surface for different appearance and processing needs

For practical use, zinc coating level directly affects corrosion resistance, while surface condition influences painting behavior and visible finish. Width range from 750–1250 mm also improves flexibility for panel design, sheet cutting, and strip processing.

3. Specifications

4. Application

• Roof panels for steel structure workshops
• Airport and warehouse roofing systems
• Storeroom and industrial building cladding
• Container plate processing
• Construction sheet and strip fabrication
• General galvanized steel components for outdoor use

5. Processing

• Cut-to-length sheet production
• Slitting into strips
• Roof panel roll forming
• Bending and profiling
• Panel fabrication for construction use
• Surface painting or coating if required

6. Advantages

• Width range from 750–1250 mm supports different panel designs
• Zinc coating 60–275 g/m² covers general to higher corrosion protection needs
• Spangle options allow selection based on appearance and downstream finishing
• Suitable for coil, sheet, and strip supply
• Continuous galvanizing process helps maintain stable coating quality
• Common construction grades support broad fabrication use

7. How to Choose

• Roofing and visible construction panels → regular or mini spangle is commonly selected
• Painting or cleaner surface appearance → zero spangle is usually preferred
• Outdoor environment → higher zinc coating such as 180–275 g/m² is commonly used
• Panel roll forming → choose suitable thickness based on profile and stiffness requirement
• Container or structural fabrication → select grade according to forming and strength needs

8. FAQ

Q1: What zinc coating level is commonly used for construction roofing?
For general outdoor construction use, medium to higher coating levels such as 120–275 g/m² are commonly selected depending on service conditions.

Q2: What is the difference between regular spangle, zero spangle, and mini spangle?
Regular spangle is often chosen for standard galvanized appearance, zero spangle is preferred for cleaner painted surfaces, and mini spangle offers a more controlled visible finish.

Q3: Can the coil be supplied as sheets or strips?
Yes, the material can be processed into cut-to-length sheets or slit strips according to downstream fabrication requirements.

Q4: Is 750 mm width suitable for roofing applications?
Yes, narrower widths such as 750 mm are commonly used for specific panel designs and roll forming requirements in construction projects.

Q5: What industries commonly use this product besides construction?
In addition to construction, it is also used for container plate processing and general industrial sheet metal fabrication.