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ASTM A653M CS-TypeB Regular Spangle Galvanised Steel Sheet in Coils Unoiled Chromated 6+ used for floor deck
Hot-dip galvanised steel coil (GI) is made by passing a fully hardened steel sheet, which has undergone a pickling and rolling process, through a zinc pot, thereby coating the surface with a zinc film. Due to the properties of zinc, it offers excellent corrosion resistance, paintability and workability. Typically, the process and specifications for hot-dip galvanised steel sheet and galvanised steel coil are essentially the same.
Galvanised steel coil applications:
Galvanised steel coils are used in a wide range of applications and have the advantage of a long corrosion protection period. It is mainly used as a building and substrate for household appliances, office panels, roof panels, automotive panels, and pre-painted steel coils.
Automotive Steel Sheet
To use automotive steel plates must first be stamped and formed, where the plates are stamped into parts of the desired shape and size.
Spot welding, as an important welding method for joining thin plates, has a wide range of applications in manufacturing, especially in the automotive industry.
Galvanised Roof Sheet
The performance requirements for galvanised roof sheets mainly include the mechanical properties of the material (tensile strength, yield strength, elongation), coating properties (coating type, coating thickness and coating adhesion).
Household Office Galvanised Sheet
Including air conditioners, washing machines, refrigerators, photocopiers, etc. Household galvanised sheet is mainly used for general forming applications and stamping.
PrePainted Steel Base Metal Substrates
Another use for galvanised steel coils is as a substrate for pre-painted steel coils. Pre-painted steel coils are more durable than galvanised coils as they have a polyethylene coating.
| ITEM | CODE | DESCRIPTION |
| CHROMATED | R | This surface treatment can reduce the white rust generated on the surface of the product during transportation and storage. Restricting hexavalent chromium substances harmful to human health in passivation films. |
| CHROMATED FREE | CS | This surface treatment can reduce the white rust generated on the surface of the product during transportation and storage. Restricting hexavalent chromium substances harmful to human health in passivation films. |
| ANTI-FINGER PRINT FREE CHROMATED | A | This surface treatment can reduce the white rust generated on the surface of the product during transportation and storage. Fingerprint resistant film can improve the sweat stain resistance of electronic or electrical product surfaces. Chromium free fingerprint resistant film restricts hexavalent chromium substances that are harmful to human health. |
| OILED | O | This surface treatment can reduce the white rust generated on the surface of the product during transportation and storage. The anti rust oil applied is generally not used as rolling oil and stamping lubricating oil for subsequent processing, and the anti rust effect is worse than that of passivation method. |
| UN-TREATMENT | U | This surface treatment is only applicable when the purchaser explicitly requests not to undergo surface treatment during the ordering period, and it must be specified in the contract. In this case, the surface of steel plates and strips is prone to white rust during transportation and storage. |
| ITEM | CODE | DESCRIPTION |
| Higher finishing surfaces | FB | Small corrosion spots, dark spots, band marks, zinc particles, passivation defects allowed |
| Superior Finishing Surface | FC | No corrosion spots are permitted, but minor indentations, scratches, zinc flow ripples, minor passivation defects are permitted to a small extent, and the other side is to remain at least FA surface |
| Index | Regular spangle Galvanized Steel Coil/Sheets | Zero spangle Galvanized Steel Coil/Sheets |
| Thickness | 0.13-2.50mm | 0.20-2.0mm |
| Width | 600~1500mm | 600~1500mm |
| Zinc Coating | Z30~Z400 g/㎡ | Z30~Z275 g/㎡ |
| Surface Treatment | Passivated / Chromated 6+,3+, Free; Oiled | Skin passed, Chromated 6+, 3+, Free Oiled, AFP (anti-finger print) |
| Steel Grade | DX51D/52D/53D/ S250GD/280GD/350GD/550GD ASTM A653M, SS255-SS550 JIS G3302-SGCC, SGCH (Full hard-G550) | DX51D/52D/53D/ S250GD/280GD/350GD/550GD ASTM A653M, SS255-SS550 JIS G3302-SGCC, SGCH (Full hard-G550) |
| Coil I.D. | 508 / 610 mm | 508 / 610 mm |
| Coil weight | 2 ~ 20 tons | 2 ~ 20 tons |
| Packaging | Standard export packing ( Eye to Side) Vertical Packing ( Eye to Sky) with wooden pallet Horizontal Packing ( Eye to Side) with wooden pallet | |
| MOQ. | 16 tons | 16 tons |
| Loading port | Tianjin / Qingdao / Rizhao port | |
| Usage | Purlins, light steel frame, ventilation duct, downpipe, round pipe, square pipe, roof panel, corrugated sheets. | Coated steel coil production, household appliances ( pre-coated metal PCM) Roof panel, corrugated sheets |
