GI -Hot Dipped Galvanized/galvannel Steel Coils/Sheet
Introduction of GI-Hot Dipped Galvanized/Galvanneal Steel Coils/Sheet
Galvanized Steel coil, a thin steel sheet that is dipped into a molten zinc bath to adhere a layer of zinc to its surface. It is mainly produced by the continuous galvanizing process, in which rolls of steel sheet are continuously dipped into a bath of molten zinc to make galvanized steel sheet; alloyed galvanized steel sheet. This steel sheet is also manufactured by the hot dipping method, but immediately after leaving the bath, it is heated to about 500°C to produce an alloyed coating of zinc and iron. This type of galvanized coil has good paint adhesion and weldability.
Features of GI-Hot Dipped Galvanized/Galvanneal Steel Coils/Sheet
Application of GI-Hot Dipped Galvanized/Galvanneal Steel Coils/Sheet
Galvanized steel coils(GI steel coils) can be used for making outside and inside automotive plates,
structual parts,reinforcements,home appliance and basic plate for coatting.Great quantities of them
have been used by main automobile makers
Specifications of GI-Hot Dipped Galvanized/Galvanneal Steel Coils/Sheet
Width | 600mm-1750mm |
Thickness | 0.13mm-5.0mm |
Length | customized |
Zinc Coating | Z40gr/m2-Z400gr/m2(both side total coating thickness) |
Surface | Skin-pass/non Skin-pass |
Chemical treatment | Chromated(Cr 3+,6+,0+) |
Spangle | Regular/Zero/Big |
Oil | Slight Oiled/Dry |
Grade | JIS G3302-SGCC-SGC570,SGCH(full hard-G550),SGHC-SGH540 |
Packing | Export standard packing ,3 Layers-kraft paper outside+waterproof plastic film in the middible+steel plate vovered with strips |
Coil Weight | 3-14 tons |
Coil ID | 508/610mm |
HRB | Soft Hard(<60),Medium Hard(60-85),Full Hard(85-95) |
Rar Materials | Cold rolled base |
Usage | Grade | Yield Strength (MPA) | Tensile Strength (MPA) | Elongation rate % |
Punching galvanized steel | DX51D+Z | ~ | 270-500 | >=20 |
DX52D+Z | 140-300 | 270-420 | >=22 | |
DX53D+Z | 140-260 | 270-380 | >=26 | |
DX54D+Z | 140-220 | 270-350 | >=30 | |
Structure galvanized steel | S220GD+Z | >=220 | >=300 | >=18 |
S250GD+Z | >=250 | >=330 | >=17 | |
S280GD+Z | >=280 | >=360 | >=16 | |
S320GD+Z | >=320 | >=390 | >=15 | |
S350GD+Z | >=350 | >=420 | >=14 | |
S400GD+Z | >=400 | >=470 | ~ | |
S500GD+Z | >=500 | >=530 | ~ | |
S550GD+Z | >=550 | >=560 | ~ |
Spangle is formed during the hot-dip galvanizing process. The size, brightness, and surface of spangles mainly depend on the composition of zinc layer and the cooling method. According to the size, it includes small spangles, regular spangles, big spangles, and free spangles. They look different, but the spangles almost will not influence the quality of galvanized steel. You can choose according to your preference and purpose.
Photos Display of GI-Hot Dipped Galvanized/Galvanneal Steel Coils/Sheet