0.15–3.8mm Z40–Z275 SGCC Big Spangle Hot Dipped Galvanized Steel Sheet JIS G3302 for Pipe Forming and Structural Applications

0.15–3.8mm Z40–Z275 SGCC Big Spangle Hot Dipped Galvanized Steel Sheet JIS G3302 for Pipe Forming and Structural Applications

1. Product Overview

Big spangle galvanized steel sheet is produced by continuous hot-dip galvanizing, forming visible zinc crystal patterns on the surface.

It is typically used in structural and pipe-forming applications where appearance uniformity is not critical.

2. Technical Solution

Key performance factors include:

• Zinc coating (40–275 g/m²)

• Spangle structure affecting surface behavior

• Base steel grade (SGCC / DX51D) ensuring formability

3. Specifications

4. Application

• Pipe forming (ERW pipes, structural tubes)

• Structural components

• Roofing and cladding

• Industrial fabrication

• Appliance internal parts

5. Processing

• Cut-to-length

• Roll forming

• Welding and fabrication

6. Advantages

• Wide coating range from Z40 to Z275

• Suitable for pipe forming applications

• Stable forming performance

• Compatible with continuous processing

7. How to Choose

• Pipe forming → Big or regular spangle

• Appearance parts → Minimized or zero spangle

• Outdoor use → Z180–Z275 recommended

8. FAQ

Q1: What is the difference between big spangle and zero spangle?
Big spangle has visible zinc crystals, while zero spangle provides a smoother surface.

Q2: Can GI sheet be used for pipe manufacturing?
Yes, SGCC and DX51D are commonly used for pipe forming.

Q3: What coating is suitable for outdoor use?
Z180–Z275 is recommended for better corrosion resistance.

Q4: Can the length be customized?
Yes, cut-to-length service is available.