Hot-dip galvanized steel coil(GI)
Is kind of coil which coated liquid zinc after the cold rolling of the long and narrow strip steel. The hot dip galvanizing coil has excellent formability, impact resistance，good corrosion resistance and good welding. The complex physical and chemical reactions of the substrate and the molten plating bath of the hot dip galvanized steel strip form the structure of the Zn-Fe alloy layer. The alloy layer is integrated with the pure zinc layer and the strip matrix, so it has a strong corrosion resistance. It can be achieved without the outside environment influence, always maintain itself best performance and appearance. It has been widely used in the field of building materials, profiles, steel pipe.
Process Flow
Basic Parameters
| Nominal Thickness(mm) | 0.12~4.0 |
| Nominal Width(mm) | 20~1250 |
| Coating Weight(g/m2) | 30~300 |
| Coil ID(mm) | 508 |
| Coil Weight(Tons) | 2-12 |
| Application | Steel structure , roofing, commercial use, household appliance, industry facilities, office buildings |
| The special order can be negotiated | |
Standard and steel grade
| GB/T 13912-2002 | AS 1397-2001 | EN10326:2004 EN10327:2004 | ASTM A653/A653M | JIS G 3302:2010 |
|---|---|---|---|---|
| DX51D+Z | G2+Z | DX51D+Z | CS type B CS type C | SGCC |
| DX52D+Z | G3+Z | DX52D+Z | DS | SGCD |
| DX53D+Z | - | DX53D+Z | - | SGCD1 |
| DX54D+Z | - | DX54D+Z | - | SGCD1 |
| S250GD+Z | G250+Z | S250GD+Z | SS 255 | SGC340 |
| S300GD+Z | G300+Z | - | - | SGC440 |
| S350GD+Z | G350+Z | S350GD+Z | SS 345 class1 | SGC490 |
| S550GD+Z | G550+Z | S550GD+Z | SS 550 class1 | SGC570 |
Surface treatment
| Item | Classification | Symbol |
|---|---|---|
| Coating type | Zinc | Z |
| Surface finish | Minimized/Regular/Big spangle | |
| Surface treatment | Chromate passivated | C |
| Non-chromate passivated | C5 | |
| Chromate passivated+oiling | CO | |
| Non-chromate passivated+oiling | CO5 | |
| oiling | O | |
| No treatment | U |
