Standard JIS G3312 Pre Painted Sheet Metal 0.2mm 1.0mm Pre Painted Gi Sheet

Standard JIS G3312 Pre Painted Sheet Metal 0.2mm 1.0mm Pre Painted Gi Sheet

1. Product Overview

Pre painted sheet metal is used where a metallic coated steel substrate and a finished color surface are both required in one material. This product range is suitable for roofing sheets, wall panels, prefab house panels, and general fabricated building sheet applications where appearance, corrosion resistance, and forming compatibility need to be considered together.

The listed size range covers 0.2–1.0mm thickness and 700–1250mm width. CGCC and DX51D are commonly used for pre painted construction sheet processing, while galvanized and galvalume base plates allow the material to be matched to different service environments.

2. Technical Solution

The product uses a coated steel base with an organic paint system on the exposed surface. In practical use, service performance depends on the combined effect of metallic coating weight, paint film build, forming route, and installation environment.

The metallic coating options on this page are Z60–Z275 for galvanized base and AZ30–AZ150 for galvalume base. The paint system uses 25±5 microns on the top side and 7±2 microns on the back side. That coating structure is suitable for standard roofing and cladding fabrication where outdoor exposure, transport handling, and roll forming all need to be considered together.

The product is also listed as soft commercial quality or lock forming quality. That matters in actual processing because bend radius, profile depth, and forming stability depend on base material condition as well as paint system.

3. Specifications

4. Application

• This material is suitable for roof panels, wall cladding, containment systems, and prefab house panels.
• It can also be used for corrugated sheets, decorative exterior panels, and general fabricated sheet parts where a pre-finished visible surface helps reduce downstream painting work.
• For building use, the final result depends not only on the coating system but also on panel profile design, overlap detailing, drainage condition, and local exposure environment.

5. Processing

• The sheet can be supplied for direct cut sheet use or for downstream profiling and forming.
• It is suitable for roll forming, bending, shearing, cutting, slitting, and general sheet metal fabrication.
• For deeper profiles or tighter bends, lock forming quality is usually more suitable than general commercial quality.
• Surface handling should be controlled during storage, cutting, and installation to reduce scratching on visible faces.

6. Advantages

• The 0.2–1.0mm range covers common roofing and wall panel sheet processing.
• The 700–1250mm width range matches mainstream panel and cladding production routes.
• Both galvanized and galvalume base options are available, which helps match different corrosion protection targets.
• The defined top and back paint thickness provides a clearer coating structure for fabrication and service selection.
• Multiple paint systems allow the sheet to be matched to standard use, better weather exposure, or higher finish retention requirements.
• RAL color customization supports project-based appearance matching.

7. How to Choose

• Choose galvanized base when the project requires a standard zinc coated painted sheet.
• Choose galvalume base when better exterior corrosion performance is required.
• Choose lower thickness when easier forming and lighter panel weight are important.
• Choose higher thickness within the listed range when the panel needs more rigidity.
• Choose polyester for standard applications, SMP for better weather resistance, and PVDF when long-term exterior appearance and UV resistance are more important.
• Choose lock forming quality when the sheet will be used for deeper profiles or more demanding forming routes.

8. FAQ

Q1．What is the thickness range of this pre painted steel sheet
The listed thickness range is 0.2–1.0mm.

Q2．What is the width range
The listed width range is 700–1250mm.

Q3．What metallic coating options are available
The listed metallic coating options are Z60–Z275 and AZ30–AZ150.

Q4．What paint systems are available
The listed paint types are polyester, SMP, and PVDF.

Q5．Can this product be used for roofing and wall panels
Yes. It is suitable for roofing sheets, wall panels, containment systems, and prefab house applications.