Prepainted Galvanized Steel PPGI - Mill Direct Supplier
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Prepainted Galvanized Steel Sheet PPGI
| Property | Parameter | Description |
|---|---|---|
| Product Name | Prepainted Galvanized Steel Sheet (PPGI) | Cold-rolled galvanized steel coil/sheet with organic coating applied on surface |
| Material Grade | DX51D, DX52D, DX53D / SGCC, SGCD / CS Type A/B/C | Equivalent grades: EN 10346 DX51D+Z, JIS G3302 SGCC, ASTM A653 CS |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, GB/T 12754 | Meets international prepainted steel coil standards for structural and commercial use |
| Chemical Composition (Base Steel) | C ≤ 0.12%, Mn ≤ 0.60%, P ≤ 0.045%, S ≤ 0.045%, Si ≤ 0.50% | Low-carbon steel substrate ensuring good formability and coating adhesion |
| Zinc Coating Mass | Z60–Z275 (60–275 g/m²) | Hot-dip galvanized coating per EN 10346 / ASTM A653; both sides combined weight |
| Tensile Strength | 270–500 MPa | Varies by grade; DX51D+Z: ≥270 MPa per EN 10346; SGCC: ≥270 MPa per JIS G3302 |
| Yield Strength | 140–420 MPa | DX51D: 140–300 MPa; higher-strength grades up to 420 MPa available |
| Elongation | ≥22% (A80mm) | DX51D+Z: ≥22%; DX53D+Z: ≥30%; ensures good bending and forming performance |
| Thickness Range | 0.14–1.50 mm | Base metal thickness excluding coating; tolerances per EN 10143 / ASTM A924 |
| Width Range | 600–1,500 mm | Standard slit widths available; custom widths upon request |
| Coil Inner Diameter | 508 mm / 610 mm | Standard ID; coil weight typically 3–10 MT per coil |
| Paint Coating System | Top coat: 15–25 μm; Primer: 5–7 μm; Back coat: 5–15 μm | Polyester (PE), High Durability Polyester (HDP), PVDF, SMP available |
| Surface Finish | Smooth, embossed, matte, high-gloss | RAL color customization available; pencil hardness ≥2H; T-bend ≤2T |
| Application | Roofing, wall cladding, home appliances, garage doors, sandwich panels, HVAC ducts | Widely used in construction, automotive interiors, and household appliance industries |
| Certification | ISO 9001, SGS, BV, CE, RoHS | Mill test certificate (MTC) per EN 10204 3.1 provided with each shipment |
| Packaging | Eye-to-sky or eye-to-wall coil packaging | Waterproof paper + steel strip bundling; wooden pallet for sheets; seaworthy export packing |
| MOQ | 25 MT per order | Mixed specifications accepted; spot stock available for standard grades and colors |
Prepainted Galvanized Steel PPGI - Mill Direct Supplier
Prepainted galvanized steel sheet PPGI stands as one of the most versatile and cost-effective coated steel products available in today's global construction and manufacturing markets. Produced by applying an organic polymer coating over a hot-dip galvanized steel substrate, PPGI combines the outstanding anti-corrosion properties of zinc coating with the aesthetic flexibility of a factory-applied paint layer. This dual-protection system makes it a preferred material for roofing panels, wall cladding, household appliance casings, automotive components, and industrial equipment enclosures. As a mill-direct supplier, we eliminate intermediary markups and deliver consistent, premium-grade PPGI coils and sheets to customers across Southeast Asia, the Middle East, Africa, and beyond. Our production lines comply with ASTM A755, EN 10169, and JIS G3312 standards, ensuring every batch meets the precise dimensional and mechanical requirements your project demands.

What is Prepainted Galvanized Steel Sheet PPGI?
PPGI — short for Prepainted Galvanized Iron or Steel — is a cold-rolled steel strip that has been hot-dip galvanized with a zinc coating and subsequently coated with one or more layers of organic paint in a continuous coil-coating process. The result is a ready-to-fabricate material that eliminates the need for post-production painting, reducing both processing time and total project cost. Zinc coating weights typically range from Z60 to Z275 g/m², providing a reliable corrosion barrier beneath the decorative topcoat.
Prepainted Galvanized Steel PPGI Manufacturing Process
The production of PPGI follows a tightly controlled continuous coil-coating line. Cold-rolled galvanized coils first undergo alkaline degreasing and chromate-free chemical pre-treatment to maximize paint adhesion. A primer coat of 5–8 µm is applied and cured in a thermally controlled oven at approximately 230°C, followed by a finish topcoat of 15–25 µm using polyester (PE), high-durability polyester (HDP), silicon-modified polyester (SMP), or polyvinylidene fluoride (PVDF) resin systems. A back coat of 5–10 µm is applied to the reverse side for added protection. The entire process is monitored by inline spectrometers and thickness gauges to guarantee color consistency within ΔE ≤ 1.0 and coating uniformity across the full coil width.
PPGI Technical Specifications
Our prepainted galvanized steel sheet PPGI is available across a broad specification range to suit diverse application requirements:
- Base Steel Thickness: 0.13 mm – 1.5 mm (tolerance per EN 10143)
- Coil Width: 600 mm – 1,500 mm
- Zinc Coating Weight: Z60 – Z275 g/m² (double-sided, per ASTM A653)
- Topcoat Thickness: 15 µm – 25 µm (PE / HDP / SMP / PVDF options)
- Yield Strength: 280 MPa – 550 MPa depending on steel grade (DX51D, DX52D, S280GD)
- Tensile Strength: 360 MPa minimum for standard commercial-forming grades
- T-Bend Test: 0T – 2T (no cracking) per ASTM D4145
- Pencil Hardness: H – 2H per ASTM D3363
- Color Range: RAL / Pantone custom matching available; gloss level 10–80 GU at 60°
- Coil Inner Diameter: 508 mm or 610 mm; coil weight up to 10 MT
Surface finish options include smooth, embossed, matte, and anti-fingerprint treatments. All products are RoHS-compliant and free from hexavalent chromium, meeting the latest environmental regulations for export to the EU and North American markets.

Get a Competitive Quote for Prepainted Galvanized Steel PPGI
Whether you require standard commercial grades or custom-specified PPGI coils for high-volume fabrication, our mill-direct supply model ensures you receive superior quality material at the most cost-effective mill-direct rates. Share your thickness, width, color, and annual volume requirements, and our technical team will respond with a tailored proposal within 24 hours.
- 24/7 customer support available
- Free samples for quality evaluation
- Competitive pricing for bulk orders
- Professional technical consultation
Contact us today to get your free quote within 24 hours!
