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GBT2518 Regular Spangle Galvanised Steel Sheet In Coils Chromated ASTM A653M CS-B FOR ROOF PANELS
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.
Hardness: soft (normal), hard, full hard
Zinc coating: 30-275 G /M², or on request
Zinc pattern: large zinc pattern, small zinc pattern, no zinc pattern
Surface finish: fingerprint resistant, chromate, oiled, unoiled
Steel Grade:Dx51D,Dx52D,Dx53D,DX54D,S220GD,S250GD,S280GD,S350GD,S350GD,S550GD； SGCC,SGHC,SGCH,SGH340,SGH400,SGH440,SGH490,SGH540,SGCD1,SGCD2,SGCD3,SGC340,SGC340,SGC490,SGC570; SQ CR22(230),SQ CR22(255),SQ CR40(275),SQ CR50(340),SQ CR80(550),CQ,FS,DDS,EDDS,SQ CR33(230),SQ CR37(255), SQCR40(275),SQ CR50(340),SQ CR80(550);
Galvanised steel coils are thin steel sheets that are dipped into molten zinc in order to attach a layer of zinc to the surface. This is an effective method of corrosion protection that extends the life of the metal material.
Regular Spangle
A regular bright pattern produced on hot-dip galvanised steel sheets by adding certain heavy elements to the molten zinc bath.
Minimum Spangle
The zinc layer (coating) is lead (Pb) free and complies with the EU WEEE and RoHS directives. It is a non-toxic and environmentally friendly material.
Classification of galvanised steel substrates
Hot rolled galvanised steel sheet: hot rolled steel sheet with pickled substrate.
Cold rolled galvanised steel sheet: the substrate is cold rolled or hardened steel sheet.
| 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 |
