1250mm Hot Dip Galvanized Zinc Sheets 20 Gauge Galvanized Steel Big Spangle Outer Walls

1. Product Overview

Hot dip galvanized steel sheet is used where the steel substrate needs metallic zinc protection before fabrication or installation. This product range is suitable for outer wall panels, roofing components, garage doors, window blinds, and general building sheet parts where corrosion resistance, sheet size, and surface appearance need to be selected together.

The listed range covers 0.3–3.0mm thickness and 35–1250mm width, so it can be used for both narrow slit strip and wider panel fabrication. Big spangle is one of the available surface appearances on this product family, which makes it suitable for projects where a conventional galvanized visual pattern is acceptable or intentionally specified.

2. Technical Solution

This product uses a hot dip galvanizing process in which the steel sheet is coated with zinc on both sides. In practical use, service performance depends mainly on zinc coating mass, cut-edge exposure, drainage condition, storage method, and the actual exposure environment after installation.

The listed zinc coating range is 60–275g/m2. Higher coating mass is generally more suitable for more demanding outdoor conditions, while lower coating mass is more suitable for lighter or better-controlled service environments. The available spangle conditions include regular, minimized, big, and zero spangle. Spangle selection mainly affects appearance and downstream finishing consistency rather than the base structural performance of the sheet.

Surface treatment options include passivated, oiled, and anti-finger treatment. These are not only storage options. They affect handling cleanliness, short-term corrosion resistance during transport, and the sheet condition before forming or installation.

3. Specifications

4. Application

This material is suitable for roofs, outer walls, garage doors, window blinds, and other sheet components in residential and industrial buildings.

It can also be used in household appliance housings, transportation related sheet parts, industrial control cabinets, refrigeration equipment housings, vending machine panels, and furniture related fabricated parts where galvanized surface protection is required before assembly or service.

For outer wall use, final service behavior depends not only on zinc coating mass but also on panel overlap design, drainage detail, fastener sealing, and the actual local environment.

5. Processing

The sheet can be supplied for cutting and slitting according to customer designation. It is suitable for cutting, bending, profiling, punching, and general sheet metal fabrication.

For visible applications, spangle type and surface treatment should be selected before production because they affect final appearance and handling behavior. For wider building panels, the 1000mm to 1250mm range is practical for mainstream cladding and roofing conversion. For narrow fabricated parts, the lower end of the width range can reduce slit loss and improve blank efficiency.

6. Advantages

• The 0.3–3.0mm thickness range covers both light gauge panel conversion and heavier fabricated building parts.
• The 35–1250mm width range provides flexibility for slit strip, formed sections, and wider wall or roof panel fabrication.
• The 60–275g/m2 zinc coating range allows the sheet to be selected according to actual corrosion requirement instead of using one fixed coating level for all projects.
• Big spangle, regular spangle, minimized spangle, and zero spangle options allow the surface to be matched to visible appearance requirements and downstream finishing needs.
• Passivated, oiled, and anti-finger surface conditions give more flexibility for storage, handling, and fabrication routes.

7. How to Choose

• Choose zinc coating level according to the actual service environment. For exterior wall and roof use, higher coating levels within the listed range are generally more suitable than lower levels when the exposure condition is more demanding.
• Choose big spangle when a conventional galvanized appearance is acceptable or intentionally specified. Choose minimized or zero spangle when surface uniformity is more important.
• Choose passivated surface for standard storage protection, oiled surface for temporary transport protection, and anti-finger treatment when cleaner visible surface handling is required.
• Choose thickness according to rigidity and forming route. Thinner gauges are more suitable for easier forming and lighter panels. Thicker gauges are more suitable for stronger sheet parts and higher stiffness requirements.

8. FAQ

Q1. What is the thickness range of this galvanized steel sheet
The listed thickness range is 0.3–3.0mm.

Q2. What is the width range
The listed width range is 35–1250mm.

Q3. What zinc coating range is available
The listed zinc coating range is 60–275g/m2.

Q4. What spangle options are available
The listed spangle options are regular, minimized, big, and zero.

Q5. Is this product suitable for outer wall applications
Yes. The page directly positions it for outer walls and building use, but the final selection should still be based on coating mass, panel design, and the actual exposure environment.