PPGI (Pre-Painted Galvanized Iron) is a pre-painted steel coil made from galvanized steel (GI) base material, coated with organic paints (such as polyester, silicon-modified polyester, or PVDF) on a continuous coil coating line. The zinc coating provides corrosion resistance, while the paint layer adds aesthetic appeal, durability, and additional protection. PPGI is widely used in construction, home appliances, and transportation for its colorful finish and long lifespan.
Specification & Coating Details
Typical coating structures and paint types for PPGI.
| Item | Specification | Description |
|---|---|---|
| Base Metal | DX51D+Z / SGCC | Galvanized steel substrate |
| Zinc Coating | Z60 – Z275 | Zinc weight (g/m²) |
| Top Paint | PE / SMP / PVDF / HDP | Polyester, Silicon-Modified, PVDF etc. |
| Paint Thickness | Top: 15–25 μm / Back: 5–10 μm | Typical dry film thickness |
| Color | RAL Standard / Custom | Can be matched to customer samples |
Note: The choice of paint type determines the weather resistance and lifespan. PVDF is recommended for high-end architectural applications, while PE is more cost-effective for general use.
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Adhesion (T-Bend) |
|---|---|---|---|---|
| PPGI | 140–300 | 270–500 | ≥22 | ≤3T (No peeling) |
Available Sizes & Delivery
| Thickness | 0.3–1.5 mm |
| Width | 600–1250 mm |
| Coil Weight | 3–10 tons per coil |
| Forms Available | Pre-painted coil (PPGI), cut-to-length sheet, corrugated sheet |
| Standard | EN 10169 / ASTM A755 / JIS G3312 |
| Mill Test Certificate | EN 10204 3.1 with every shipment |
| MOQ | 5 Tons |
| Delivery Time | Within 15-20 days (≤1000 tons) |
Why Order from Zhongtang Steel?
- Rich Color Options — RAL colors, custom patterns, and wood/marble finishes
- Excellent Weatherability — PVDF/SMP coatings for long-term outdoor use
- Strong Adhesion — Passes T-bend and impact tests without peeling
- EN 10204 3.1 MTC supplied with every shipment
- Mill-direct pricing — no trading company markup
Applications
- Roofing and wall cladding for factories, warehouses, and stadiums
- Home appliances — refrigerators, washing machines, air conditioners
- Internal and external wall panels
- Steel doors, garage doors, and roll-up shutters
- Furniture and office partitions
- Transportation — vehicle bodies and shipping containers
Values are typical reference ranges per EN 10169. Actual properties may vary by mill, paint type, and production route. Mill test certificates (EN 10204 3.1) are supplied with every shipment — contact us for exact data sheets.
