1.2mm Prepainted Color Steel Coil with 180–320MPa Yield Strength and 10–25μm Top Coating for Fencing Panels

1. Product Overview

Prepainted steel coil for roofing sheet production is designed for projects that require both substrate corrosion protection and a finished color surface. In this type of product, the metal base can be galvanized steel or galvalume steel, while the painted top layer improves appearance consistency and adds another barrier against weather exposure.

For roofing sheet processing, the thickness range of 0.2–1.0 mm is suitable for roll forming and corrugation production. Widths from 700 mm to 1250 mm also match common roofing and cladding lines.

2. Technical Solution

Product performance is based on:

• Galvanized or galvalume substrate as the base protective layer
• Organic paint coating for surface finish and additional barrier protection
• Top coating of 25±5 μm for visible side coverage
• Back coating of 7±2 μm for reverse-side protection in standard use
• Soft commercial quality or LFQ for bending, profiling, and roofing sheet forming

For roofing sheets, the final performance depends on substrate type, coating system, paint thickness, and forming radius. PE is commonly used for standard projects, while SMP or PVDF are selected when higher weather resistance is required.

3. Specifications

4. Application

• Roofing sheets for steel structure workshops
• Warehouse and storeroom roof panels
• Container-related sheet parts
• Light wall cladding and trim panels
• Home appliance outer panels
• General prepainted building sheet fabrication

5. Processing

• Cut-to-length sheet production
• Slitting into narrow strips
• Roll forming into corrugated roofing sheets
• Bending and folding
• Custom cutting and slitting according to project size
• Protective film application when required

6. Advantages

• 0.2–1.0 mm thickness range suits mainstream roofing sheet production
• 25±5 μm top coating is suitable for visible construction panels
• 700–1250 mm width range fits common roll forming lines
• CGCC and DX51D / DX52D grades support common forming requirements
• PE, SMP, and PVDF options allow coating selection by environment
• RAL color customization supports project appearance matching

7. How to Choose

• Standard roofing projects with controlled budget → PE is commonly selected
• Projects requiring stronger weather resistance → SMP is often preferred
• Long-term exterior exposure and higher UV demand → PVDF is usually selected
• Lightweight roofing sheet production → 0.2–0.5 mm is commonly used
• More rigid formed panels → higher thickness within the 0.6–1.0 mm range is often selected

8. FAQ

Q1: Is this product PPGI or PPGL?
This page includes both prepainted galvanized steel and prepainted galvalume steel options, so the base metal should be confirmed before order.

Q2: What is the meaning of top 25±5 μm and back 7±2 μm?
It refers to the paint film thickness on the exposed side and reverse side, which affects surface coverage and coating performance.

Q3: Can this coil be processed into roofing sheets?
Yes. It is commonly used for roll formed roofing sheets and other prepainted building profiles.

Q4: What is LFQ in prepainted steel coil?
LFQ means lock forming quality, which is used when better forming performance is required in profiling and sheet fabrication.

Q5: Which coating system is more suitable for outdoor roofing?
PE is common for standard projects, while SMP or PVDF are generally selected when stronger weather resistance is needed.