The prepainted steel sheet in coil is a product obtained by subjecting a hot-dipped galvanized steel sheet, and galvalume steel sheet, or an aluminum sheet to a surface chemical treatment (coating), followed by baking and curing.
The total thickness of the pre-panted galvanized steel coil is composed of the base steel - coating -primer - top paint - protective layer thickness. The top paint thickness is 10-25μm, and the back paint thickness is 5-20μm. The thinner the base steel thickness, the higher the price of the ppgi steel coil, because the processing cost becomes higher.
Usually, the paint coating material is polyester (PE) and the color of the back paint is white grey. The color can be customized according to the RAL color card or customer samples. Special patterns can be made, such as wood grain, flower print, camouflage, brick.
1) PPGI is also known as prepainted galvanized steel coil and color coated steel coil, with a hot dip zinc coated steel sheet substrate.
2) PPGL is also known as prepainted galvalume steel coil, with a galvalume steel sheet as a substrate.
| Product name | Prepainted Galvanized Steel Coil |
| Standard | AISI, ASTM, BS, DIN, GB, JIS, EN |
| Grade | Q195,Q235 |
| SGCC, SGCH, SGC340, SGC400, SGC440, SGC490, SGC570 | |
| SGHC, SGH340, SGH400, SGH440, SGH490, SGH540 | |
| DX51D, DX52D, DX53D, DX54D | |
| S220GD, S250GD, S280GD, S320GD, S350GD, S400GD, S500GD, S550GD | |
| Zinc | 20-120g |
| Thickness | 0.11-2.5 mm |
| Width | 600-1500 mm |
| Length | As require |
| Color | all RAL color , as client's request |
| Paint Coating Thickness | Top 8-35um,Back 3-25um |
| Zinc Coating | Z30 - 275g/m2,AZ30- 150g/m2 |
| Top Side | Primer paint+polyester paint coating |
| Back side | Primer epoxy |
| Hardness | >=F |
| T Bend | >=3T |
| Reverse Impact | >=9J |
| Salt Spray Resistance | >=500 hours |
| Painting Coat Style | 2/1, 2/2 |
| Paints | PE, SMP, HDP, PVDF |
| Pencil hardness | >2H |
| Coil ID | 508/610mm |
| Coil weight | 3-8tons |
| Surface | glossy and matt |
| Glossy | 30%-90% |
| Hardness | soft (normal), hard, full hard(G300-G550) |
| Certificates | ISO 9001, SGS, CE |
| MOQ | 1 tons |
| Packing | standard export packing (inside:water proof paper,outside:steel covered with strips and pallets) |
| Delivery time | 7-15days after confirmed order |
| Container size | 20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) |
| 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) | |
| 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) |
Mechanical Properties Of The Substrate
Mechanical properties of PPGI(pre-painted galvanized) steel coil substrate.
| Grade | Yield Strength a,b MPa | tensile strength MPa | Elongation after breakingc A 80mm % not less than | r 90 not less than | n 90 not less than |
| DC51D+Z | - | 270~500 | 22 | - | - |
| DC52D+Z | 140~300 | 270~420 | 26 | - | - |
| DC53D+Z | 140~260 | 270~380 | 30 | - | - |
| DC54D+Z | 120~220 | 260~350 | 36 | 1.6 | 0.18 |
