SGCC Hot Dipped Galvanized Steel Sheet Zinc Coating G40 G90 JIS G3302

Product Specification

SGCC Hot Dipped Galvanized Steel Sheet Zinc Coating G40 G90 JIS G3302

1. Product Overview

Hot dipped galvanized steel sheet is used where the steel substrate needs metallic zinc protection before fabrication or installation. This product range is suitable for roofing sheets, wall components, building panels, and general industrial sheet fabrication where corrosion resistance, sheet size, and surface condition need to be selected together.

The page combines JIS G3302 SGCC supply with G40-G90 coating designation and a zinc coating range of 40-275g/m2. The listed width range is based on 1000mm, 1220mm, 1250mm, and 1500mm, while the practical thickness range on the page is 0.12-3.0mm.

2. Technical Solution

This product uses a hot dip galvanizing process, where the steel sheet is coated with zinc to form a barrier layer against atmospheric exposure. In practical use, corrosion performance depends on the zinc coating mass, cut edge exposure, drainage condition, storage method, and whether the sheet is used indoors or outdoors.

The page also provides several surface condition options including passivated, oiled, and anti-finger treatment. These are not only appearance options. They affect storage stability, handling cleanliness, and the short-term resistance of the surface during transport and downstream fabrication.

Spangle options include regular spangle, minimized spangle, big spangle, and zero spangle. Spangle selection mainly affects surface appearance and downstream finishing consistency. For visible sheet parts or further coating routes, minimized or zero spangle is often preferred when surface uniformity matters.

3. Specifications

4. Application

This material is suitable for roof panels, roof accessories, exterior wall components, garage doors, and window blind related sheet parts in construction use.

It can also be used in household appliances, transportation parts, industrial control cabinets, refrigeration equipment housings, vending machine panels, and furniture related sheet fabrication.

For exterior applications, final durability depends not only on coating mass but also on profile design, overlap detailing, drainage, and actual exposure environment.

5. Processing

• The sheet can be used for cutting, bending, profiling, punching, and general sheet metal fabrication.
• For visible parts, spangle type and surface treatment should be selected before production because they affect final appearance and handling behavior.
• For roofing conversion, the forming route should be checked against sheet thickness and panel geometry. For cut edge exposure in outdoor use, storage and installation details should be controlled so water is not trapped at overlaps or edges.

6. Advantages

• The 0.12-3.0mm range covers both light gauge sheet processing and heavier fabricated components.
• The 40-275g/m2 zinc coating range allows the product to be selected according to actual corrosion requirement instead of using one fixed coating level for all projects.
• Multiple spangle options allow the sheet to be matched to visible surface requirements and downstream finishing needs.
• Passivated, oiled, and anti-finger surface conditions give more flexibility for storage, handling, and fabrication routes.
• The listed standard widths are practical for roofing, appliance, and industrial sheet conversion.

7. How to Choose

• Choose zinc coating level according to the actual service environment. For lighter indoor or protected use, a lower coating level may be acceptable. For exterior or more demanding use, a higher coating level within the listed range is generally more suitable.
• Choose minimized or zero spangle when surface uniformity is more important. Choose regular spangle when standard galvanized appearance is acceptable.
• 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. Thin gauges are more suitable for light panels and easier forming. Thicker gauges are more suitable for stronger structural parts and higher stiffness requirements.

8. FAQ

Q1. What is the thickness range of this hot dipped galvanized steel sheet
The listed thickness range is 0.12-3.0mm.

Q2. What zinc coating range is available
The listed zinc coating range is 40-275g/m2.

Q3. What does G40-G90 mean on this page
It refers to the ASTM coating designation range listed for the galvanized sheet route.

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

Q5. What surface treatments are available
The listed surface treatments are passivated (chromated), oiled, and anti-finger treatment (acrylic coating).