JIS G3312 CGCC DX51D+Z LFQ Prepainted Color Steel Coil 0.12–1.20mm for Roofing and Building Panels

1．Product Overview

JIS G3312 CGCC DX51D+Z LFQ prepainted color steel coil is designed for roofing sheets, wall cladding, steel structure buildings, home appliance panels, and other visible sheet applications.

The product uses a hot dipped galvanized steel substrate with a color coating system. The zinc coating provides base corrosion protection, while the painted surface improves appearance, weatherability, and color consistency for finished panels.

2．Technical Solution

The coil combines galvanized steel substrate, primer, and finish coating in a continuous coating process.

The top surface uses 10–20 micron polyester plus 5 micron primer. The back surface uses 5–7 micron or 7–8 micron polyester plus 5 micron primer.

Available paint systems include polyester, SMP, and PVDF. Polyester is suitable for standard applications, SMP provides improved weather resistance, and PVDF is selected for stronger UV resistance and longer exterior service.

3．Specifications

4．Application

This prepainted color steel coil is suitable for roofing sheets, wall cladding, steel structure workshops, warehouses, airport buildings, storage buildings, home appliance panels, and decorative construction sheets.

It is commonly used where the final product requires a clean painted surface, stable forming performance, and reliable corrosion protection.

5．Processing

• The coil can be supplied for cut-to-length sheet production.
• It can be slit into narrower widths for roofing sheet and wall panel fabrication.
• It is suitable for roll forming, bending, profiling, and general sheet processing.
• Protective film can be applied on the top side when surface protection is required during processing, transportation, or installation.

6．Advantages

• The galvanized substrate provides corrosion protection with 20–275g/m² zinc coating.
• The 0.12–1.20mm thickness range covers common roofing and panel fabrication requirements.
• The 700–1250mm width range fits mainstream roll-forming and cladding production lines.
• Commercial quality and LFQ options support different forming requirements.
• Polyester, SMP, and PVDF paint systems support different weather exposure conditions.
• Coil ID 508mm / 610mm and max. 13 MT coil weight are suitable for standard processing equipment.

7．How to Choose

• Choose polyester for standard roofing sheets, wall panels, and general building applications.
• Choose SMP when improved weather resistance is required.
• Choose PVDF for higher UV exposure and longer outdoor service requirements.
• Choose higher zinc coating levels for humid or more exposed environments.
• Choose thicker material when higher panel rigidity is needed.
• Confirm color, gloss, protective film, coil ID, and final processing method before production.

8．FAQ

Q1．What does LFQ mean
LFQ means Lock Forming Quality, which is suitable for forming, bending, and profiling applications.

Q2．What is the available thickness range
The available thickness range is 0.12–1.20mm.

Q3．What is the available width range
The available width range is 700–1250mm.

Q4．What paint systems are available
Polyester, SMP, and PVDF are available.

Q5．Can customized colors be supplied
Yes. Colors can be supplied according to RAL Card or client request.