Galvanized Steel Coil Z120

Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of galvanized steel coil z120 in China. Welcome to wholesale customized galvanized steel coil z120 at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.

 

 

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All steel products for commercial, agricultural, mechanical, and industrial use are subject to ASTM standard specifications. Zinc-coated (galvanized) steel coil by the Hot-Dip Process like Z120 indicates the coating thickness.

• What is the Z120 galvanized steel coil?

Galvanized steel coil with Z120 grade is coated with zinc to make it more durable. The process works by immersing the coiled steel plate in the galvanizing tank that is filled with molten zinc. By subjecting the thin steel plate to a continuous galvanizing process, the result is a galvanized coil. This type of steel offers better formability and good painting adhesion during commercial or construction use. Another way to produce galvanized steel plates is through a hot-dipping procedure. In this method, it is crucial that right after leaving the tank, the steel plate undergoes 500°C heat treatment to form an alloy film coating.

The galvanized steel coil is popularly used in ventilation ducts, floor panels, automobiles, sandalwood strips, color-coated substrates, and three-dimensional parking garages. The industries that heavily rely on it are transportation, agriculture, solar, and appliances.

The primary advantage of galvanized steel is the strong resistance against corrosion. The zinc coating protects the underlying steel against the harsh elements of the environment.

 

GALVANIZED STEEL COIL
Standard	ISO,JIS,AS EN,ASTM
Grade	Q195 Q235 Q345
	SGCC SGCH SGC340 SGC400 SGC440 SGC490 SGC570
	SGHC SGH340 SGH400 SGH440 SGH490 SGH540
	DX51D DX52D DX53D DX54D DX55D DX56D DX57D
	S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD
	SS230 SS250 SS275
Width	600mm to 1500mm
Thickness	0.125mm to 3.5mm
Zinc coating	30g/m2 to 275g/m2
Coil weight	3 tons to 6 tons
Coil ID	508mm or 610mm
Surface treatment	Unoil,Dry,Chromate Passivated, Non-chromate Passivated
Spangle	Regular Spangle, minimum Spangle,Large Spangle, Zero Spangle
Capacity	1,500,000MT/year
Delivery	15-25 Days
Spangle	Big Medium Small Zero
Zinc Coating	30-275g/m2
Coil Weight	3-8 Tons

 

• What does Z120 mean?

Z120 is a coating designation that shows that the approximate coating thickness of both sides is 120 g/m2 or 36 g/m2 (triple-spot test)/90 g/m2 (single-spot test). Because of the changing condition during the continuous hot-dip process and certain variables, the zinc coating is not equally divided between the sides' surfaces or spread evenly from one edge to the other. The zinc coating thickness is calculated by dividing the zinc coating mass on two sides (g/m2) and the zinc density (g/cm3).

 

• Surface Display

Surface state of Galvanized steel coil: Due to different treatment methods in the coating process, the surface state is different, forming Zero spangle, small spangle, Regular spangle and big spangle .

Regular spangle zinc coating	In the normal solidification process of the zinc layer, the zinc crystal grains are freely grown to form a coating having a distinct zinc flower morphology.
small spangle zinc coating	During the solidification of the zinc layer, the zinc grains are artificially restricted to form as fine a zinc coating as possible.
Zero spangle zinc coating	By adjusting the chemical composition of the plating solution, there is no visible visible zinc flower morphology, and the surface is uniformly coated.

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