| Product Name | PPGI Steel Coil, Hot-dip Galvanized Steel PPGI, Pre-Painted Galvanized Steel Coils, etc. |
| Base Material Standard | ASTM A653, JIS G3302 , GB/T 2518 |
| Coating Standard | ASTM A755/A755M |
| Common Steel Grades
|
SGCC, DX51D, DX52D |
| S220GD, S250GD, S280GD, SGC340, SGC400 | |
| Q195, Q235, Q345 | |
| Thickness | 0.12 – 2.5 mm |
| Width | 600 – 1500 mm (Customized Available) |
| Inner Diameter (ID) | 508 mm (20″) , 610 mm (24″) |
| Outer Diameter (OD) | 1000 – 1800 mm |
| Coil Weight | 3 – 12 MT per coil |
| Zinc Coating | 100 to 600+ g/m² (Z10 to Z180 equivalent) |
| Colors | Standard RAL Colors or Customized |
| Certificate | CE, ISO 9001, ROHS |
| Main Port | Tianjin |
| Packaging | Standard Export Packing (Steel strapped, anti-rust paper, steel/wooden pallet) or as required |
PPGI (Pre-Painted Galvanized Steel) Coil is produced on a continuous coil-coating line. It starts with a corrosion-resistant hot-dip galvanized (GI) steel substrate, which is then pre-treated and coated with high-performance paints (e.g., Polyester, PVDF).
This process allows for extensive customization. The paint thickness can be tailored across a wide range (typically 10-70μm for the top coat) to meet specific durability needs and cost targets. Additionally, a vast array of colors is available according to standard RAL charts or custom samples. We can also produce coils with special decorative patterns, such as wood grain, stone, brick, or camouflage, greatly expanding design possibilities.
Coating Thickness & Durability Options:
· Standard Grade: Top coat 15-20 μm, Back coat 5-7 μm.
· Commercial/Industrial Grade: Top coat 20-25 μm, Back coat 7-10 μm.
· Premium/Heavy-Duty Grade: Top coat 25 μm to 70 μm.
| Coating | Expected Service Life* | Best For |
|---|---|---|
| Polyester (PE) | 5-8 Years | Most cost-effective solution for interior & general construction in mild climates. |
| Silicone Modified Polyester (SMP) | 10-15 Years | Enhanced UV resistance for residential roofing and siding in moderate coastal/industrial areas. |
| High-Durability Polyester (HDP) | 15-20+ Years | Superior weather & scratch resistance for demanding architectural and industrial applications. |
| PVDF (70% resin) | 20-30+ Years | Maximum durability for premium architecture and severe industrial/coastal environments. |
The following table lists the minimum or typical mechanical properties of common base steel grades used for our PPGI coils.
| Steel Grade | Yield Strength (Rp0.2) Min. | Tensile Strength (Rm) Min. | Elongation (A80 mm) Min. | Typical Application |
|---|---|---|---|---|
| DX51D / SGCC | 140 – 280 MPa* | 270 MPa | 22 % | Commercial quality, general forming |
| S220GD | 220 MPa | 300 MPa | 15 % | Structural, light load-bearing |
| S250GD | 250 MPa | 330 MPa | 15 % | Structural, general load-bearing |
| S280GD / SGC340 | 280 MPa | 360 MPa | 14 % | Structural, higher strength requirement |
| S320GD / SGC400 | 320 MPa | 390 MPa | 13 % | Structural, high strength |
| SGC440 | 340 MPa | 440 MPa | 12 % | Structural, very high strength |
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