The main technology of the galvanized steel sheet is proceeding by the chemistry degrease and electroanalysis with the cold rolled steel coil and sheet, clean the coils on the surface of the steel,sufficiently heated to the proper temperature for zinc coating, pass by level up,strain rectify,and then passivation or annoit etc.

Galvanized Steel Roof Corrugated Sheet Specification

Product Name	Galvanized Steel Roof Corrugated Sheet
Grade	SGCC,SGCD,SGCE,SPCC,SPCD,SPCE,DX51D, DX53D,DX52D,etc.
Standard	JIS G3302-2007,ASTM A653,GB/T2518-2008,BS,etc.
Thickness	0.12-0.8mm
Width	930/915/910/905/900/880/875/815/810/790/780/680/670/660/655/650 (width after corrugation),or according to your requirement
Weight Per Bundle	3~8MT,according to your requirement
Surface Treatment	Galvanized(Zinc 30-275g/m2,double sides)Oil,chromated as your requirement
Spangle	Zero / Regular / Big / Small spangle
Logo	According to your requirement
Application	Gymnasium, factories, workshops, warehouse, residential, carport, farmer's market and the highway coaming etc.
Package	Export Standard Package (Packed in bundles,with plastic film inner side, Sea Worthy Water proof & anti rust paper outside,and packed with galvanized steel sheets top and bottom outer side, then fasten the bundle with wire straps or hemp ropes on Steel Pallet.
Capacity	1,000,000MT/year