Z60–Z275 Prepainted Galvanized Steel Coil 0.20–1.0mm with 750–1250mm Width for Roofing Sheets and Building Panels

1.Product Overview

Prepainted galvanized steel coil is used for roofing sheets, wall panels, light building components, and appliance-related sheet fabrication where both corrosion protection and a finished color surface are required. The galvanized substrate provides the base anti-corrosion layer, while the paint system improves surface durability and appearance consistency.

This specification covers 0.20–1.0 mm thickness and 750–1250 mm width, which fits mainstream cut-to-length, slitting, and roll-forming lines. It is commonly used for roof sheet production in workshops, warehouses, airports, and other steel structure buildings.

2.Technical Solution

Product performance is based on:

• Galvanized steel substrate with controlled zinc coating mass
• Organic paint layer acting as an additional barrier above the zinc layer
• Color selection according to the RAL card for project appearance matching
• Thickness range suitable for roll forming, bending, and roofing sheet production
• Polyester, SMP, and PVDF systems available for different weather exposure levels

For exterior panels, corrosion resistance depends on both the zinc coating and the paint system. Z60 is typically used for standard service conditions, while higher coating levels such as Z180–Z275 are more suitable where longer outdoor durability is required.

3.Specifications

4.Application

• Roofing sheets for steel structure workshops
• Warehouse and storeroom roof panels
• Wall cladding and facade panels
• Home appliance outer panels
• Container-related sheet parts
• General decorative and functional building sheets

5.Processing

• Cut-to-length sheet production
• Slitting into narrower strips
• Roll forming into roofing and wall profiles
• Bending and folding
• Custom cutting according to project size
• Color matching according to RAL designation

6.Advantages

• 0.20–1.0 mm thickness range suits mainstream roofing and cladding production
• 750–1250 mm width range matches common roll-forming equipment
• Z60–Z275 coating range allows selection by corrosion environment
• Polyester, SMP, and PVDF systems support different weatherability requirements
• RAL-based color selection helps maintain project appearance consistency
• Suitable for both visible building panels and functional sheet parts

7.How to Choose

• General roofing use → polyester is commonly selected
• Projects requiring better weather resistance → SMP is often preferred
• Higher UV and long-term outdoor exposure → PVDF is usually selected
• Standard environment → Z60–Z120 is commonly used
• More demanding outdoor corrosion conditions → Z180–Z275 is usually preferred
• Higher panel rigidity requirement → choose thicker sheet within the 0.20–1.0 mm range

8.FAQ

Q1: Is this product PPGI or bare GI coil?
This specification is prepainted galvanized steel coil, which means a galvanized substrate with a color coating on the surface.

Q2: What does Z60 to Z275 mean?
It refers to the zinc coating level on the galvanized substrate. Higher coating levels are generally used where stronger corrosion resistance is required.

Q3: Can this coil be processed into roofing sheets?
Yes. It is commonly used for roll forming into roofing and wall cladding profiles.

Q4: Which paint type is suitable for outdoor roofing?
Polyester is commonly used for standard projects, while SMP and PVDF are selected when better weather resistance or longer exterior life is required.

Q5: Is the source value “Z27” correct?
In the source text, one line shows “Z27,” but the same source also states 120–275 g/m², double sides. Based on that range, this page treats the correct value as Z275.