Hot Dip Galvanized Coil

Hot-dip galvanizing is one of the effective means to delay the environmental corrosion of iron and steel materials, it is the surface of the cleaned, activated iron and steel products immersed in molten zinc, through the reaction and diffusion between iron and zinc, in the iron and steel products surface plating good adhesion of zinc alloy coating.

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Hot Dip Galvanized Coil Description

Hot dip galvanizing is to make the molten metal react with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. Hot galvanizing is to pickle the steel and iron parts first. In order to remove the iron oxide on the surface of the steel and iron parts, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent into the hot dip plating tank. Hot dip galvanized coil has the advantages of uniform coating, strong adhesion and long service life. Compared with other metal protection methods, the hot-dip galvanizing process has advantages in the protection characteristics of the combination of physical barrier and electrochemical protection of the coating, the bonding strength of the coating and the substrate, the compactness, durability, maintenance-free and economy of the coating, and its adaptability to the shape and size of the product.
The production process of hot galvanizing is as follows:
Mother material → degreasing → water washing → pickling → water washing → rinsing → flux solution → drying → hot galvanizing → cooling → inspection → packaging

Scope of Application

For a long time, hot-dip galvanizing process has been favored by people because of its low plating cost, excellent protection characteristics and beautiful appearance. It is widely used in automobile, construction, household appliances, chemical industry, machinery, petroleum, metallurgy, light industry, transportation, electric power, aviation and marine engineering and other fields.

Product Parameters

Product Name	Hot Dip Galvanized Coil
Thickness	0.12mm-3.5mm
Width	600mm-1500mm
Length	508mm/610mm, Support Customization
Standard	AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Zinc Layer	Hot Galvanizing: 60-275g/m虏
Zinc Layer	Pre-galvanized: 80-275g/m虏

Chemical Composition

Standard	Grade	C	Si	Mn	P	S	Ti
Forcold Forming	DX51D+Z	0.12	0.5	0.6	0.1	0.045	0.3
Chinese Standard	DX52D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX53D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX54D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX56D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX57D+Z	0.12	0.5	0.6	0.1	0.045	0.3
Forcold Forming	SGCC	0.15	0.5	0.8	0.05	0.03	0.025
Japanese Standard	SGCD1	0.12	0.5	0.6	0.04	0.03	0.025
	SGCD2	0.1	0.5	0.45	0.03	0.03	0.025
	SGCD3	0.08	0.5	0.45	0.03	0.03	0.025
	SGCD4	0.06	0.5	0.45	0.03	0.03	0.025
For Structure	SGC340	0.25	0.5	1.7	0.2	0.035	0.025
Japanese Standard	SGC400	0.25	0.5	1.7	0.2	0.035	0.15
	SGC440	0.25	0.5	2	0.2	0.035	0.15
	SGC490	0.3	0.5	2	0.2	0.035	0.025
	SGC510	0.3	0.5	2.5	0.2	0.035	0.025
For Structure	S220GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
AISI Standard	S250GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S280GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S320GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S350GD+Z	0.2	0.6	0.7	0.1	0.045	0.15
	S550GD+Z	0.2	0.6	0.7	0.1	0.045	0.15

Mechanical Properties

Grade	Yield Strength MPa≥	Tensile Strength MPa≥	Elongation A%≥
DX51D Z/ZM/AZ/AM	240-380	270-500	22
DX52D Z/ZM/AZ/AM	140-300	270-420	26
DX53D Z/ZM/AZ/AM	140-260	270-380	30
DX54D Z/ZM/AZ/AM	120-220	260-350	36
S220GD Z/ZM/AM	220	300	20
S250GD Z/ZM/AZ/AM	250	330	19
S280GD Z/ZM/AM	280	360	18
S300GD A/AM	300	380	18
S320GD Z/ZM/AM	320	390	17
S350GD Z/ZM/AZ/AM	350	420	16
S450GD A/AM	450	480	15
S550GD Z/ZM/AZ/AM	550	550	-

Galvanized Surface Selection

Zero Spangle	Minimized Spangle	Normal Spangle	Large Spangle


Use of The Environment	Recommended Zinc Thickness
Indoor Use	Z10 or Z12 (100g/㎡or 120g/㎡)
Suburbs	Z20 and Painting (200g/㎡)
Urban or Industrial Area	Z27 (270g/㎡) or G90 (US Standard) and painted
Coastal Area	Thicker than Z27 (270g/㎡) or G90 (US Standard) and painted
Punch or Deep Drawing Application	Thicker than Z27 (270grams/㎡) or G90 (US Standard) avoid coating peeling after stamping

Surface Treatment Type	Code	Features
Chromic Acid Treatment	C	Good corrosion resistance, suitable for bare state
Chromic Acid Treatment+Oiling	S	Good corrosion resistance
Phosphoric Acid Treatment (Including Sealing Treatment)	P	Have a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Including Sealing Treatment)+Oiling	Q	Has a certain corrosion resistance, good paint performance, prevent rust during transportation and storage
Phosphoric Acid Treatment (Excluding Sealing Treatment)	T	Have a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Excluding Sealing Treatment)+Oiling	V	Has a certain corrosion resistance, good paint performance, and prevent rust
Oiling	O	Prevent rust during transportation and storage
No Treatment	M	Suitable for immediate painting

Material Comparison

Chinese Standard	Japan Standard	European Standard
DX51D Z/DC51D Z (CR)	SGCC	DX51D Z
DX52D Z/DC52D Z	SGCD1	DX52D With
DX53D Z/DC53D Z/DX54D Z/DC54D Z	SGCD2/SGCD3	DX53D Z/DX54D Z
S220/250/280/320/350/550GD Z	SGC340/400/440/490/570	S220/250/280/320/350GD Z
DX51D Z/DD51D Z (HR)	SGHC	DX51D Z

Scope of Application

Aluminum Uses And Application Area
Food Packaging	Beverage can ends, cans, bottle caps, etc.
Building	Curtain walls, cladding, suspended ceilings, thermal insulation, venetian blinds, etc.
Transportation	Auto parts, passenger car bodies, aviation ships and air cargo containers.
Electronic聽Equipment	Electrical appliances, communication equipment,PCPlate drilling guide, lighting and heat dissipation materials, etc.
Consumer Goods	Umbrellas, cooking utensils, sports equipment, etc
Other	Military, color coated aluminum plate

Product Package

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