Galvanized Steel Sheet
Hot-dip galvanizing reacts molten metal with an iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, after pickling, they are cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride. , and then sent into the hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life.
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Product Description

Product Description

Hot-dip galvanizing reacts molten metal with an iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, after pickling, they are cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride. , and then sent into the hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life.

Hot-dip galvanizing is one of the effective means to delay the environmental corrosion of steel materials. It immerses the cleaned and activated steel products in molten zinc liquid. Through the reaction and diffusion between iron and zinc, the surface of the steel products is Zinc alloy coating with good adhesion. Compared with other metal protection methods, the hot-dip galvanizing process combines the physical barrier and electrochemical protection of the coating, the bonding strength between the coating and the substrate, the density, durability, maintenance-freeness and economy of the coating. It has advantages in terms of durability and adaptability to the shape and size of products. At present, hot-dip galvanized products mainly include steel plates, steel strips, steel wires, steel pipes, etc., among which hot-dip galvanized steel plates account for a large proportion.

 

The production process of hot dip galvanizing is as follows:

Base material → oil removal → water washing → pickling → water washing → rinsing → flux solution → drying → hot dip galvanizing → cooling → inspection → packaging

 

Application scope

For a long time, the hot-dip galvanizing process has been favored by people because of its low plating cost, excellent protective properties and beautiful appearance. It is widely used in automobiles, construction, home appliances, chemicals, machinery, petroleum, metallurgy, and light industry. , transportation, electric power, aviation and ocean engineering and other fields.

 

Product parameters

Product Namehot dipped galvanized sheet
Thickness0.12mm-6.00mm
Width600mm-1500mm
Length1m-12m, support customization
StandardAISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Zinc layerHot dip galvanizing: 60-275g/m²
Pr-galvanized: 80-275g/m²


Chemical Composition

StandardGradeCSiMnPSTi
For cold forming Chinese standardDX51D+Z0.120.500.600.1000.0450.030
DX52D+Z0.120.500.600.1000.0450.030
DX53D+Z0.120.500.600.1000.0450.30
DX54D+Z0.120.500.600.1000.0450.30
DX56D+Z0.120.500.600.1000.0450.30
DX57D+Z0.120.500.600.1000.0450.30
For cold forming Japanese standardSGCC0.150.500.800.0500.0300.025
SGCD1SGCD20.120.100.500.500.600.450.0400.0300.0300.0300.0250.025
SGCD30.080.500.450.0300.0300.025
SGCD40.060.500.450.0300.0300.025
For structure Japanese standardSGC3400.250.501.700.2000.0350.025
SGC400SGC4400.250.250.500.501.702.000.2000.2000.0350.0350.1500.150
SGC4900.300.502.000.2000.0350.025
SGC5100.300.502.500.2000.0350.025
For structure AISI standardS220GD+Z0.200.600.700.1000.0450.025
S250GD+Z0.200.600.700.1000.0450.025
S280GD+Z0.200.600.700.1000.0450.025
S320GD+Z0.200.600.700.1000.0450.025
S350GD+Z0.200.600.700.1000.0450.150
S550GD+Z0.200.600.700.1000.0450.150

 

Mechanical behavior

GradeYield strength MPa≥Tensile strength MPa≥Elongation A%≥
DX51D+Z/ZM/AZ/AM240-380270-50022
DX52D+Z/ZM/AZ/AM140-300270-42026
DX53D+Z/ZM/AZ/AM140-360270-38030
DX54D+Z/ZM/AZ/AM120-220260-35036
S220GD+Z/ZM/AM22030020
S250GD+Z/ZM/AZ/AM25033019
S280GD+Z/ZM/AM28036018
S300GD+ZM/AM30038018
S320GD+Z/ZM/AM32039017
S350GD+Z/ZM/AZ/AM35042016
S450GD+Z/ZM/AM45048015
S550GD+Z/ZM/AZ/AM550550-

 

 

 

Galvanized surface options

Zero zinc flowerSmall zinc flowerNormal zinc flowerBig zinc flower
    

 

 

Usage environmentRecommended zinc layer thickness
Indoor useZ10 or Z12 (100g/㎡or 120g/㎡)
SuburbsZ20 and painted (200g/㎡)
Urban or industrial areaZ27 (270g/㎡) or G90 (US standard) and painted
Coastal areasThicker than Z27 (270g/㎡) or G90 (US standard) and painted
Stamping or deep drawing applicationsThinner than Z27 (270g/㎡) or G90 (US standard) to avoid coating peeling after stamping

 

 

Surface treatment typeCodeFeature
Chromic acid treatmentCGood corrosion resistance, suitable for exposure
Chromic acid treatment + oilingSGood corrosion resistance
Phosphoric acid treatment (including sealing treatment)PHas certain corrosion resistance and good paint performance
Phosphoric acid treatment (including sealing treatment) + oilingQHas certain corrosion resistance, good paint performance, and prevents rust during transportation and storage
Phosphoric acid treatment (excluding sealing treatment)THas certain corrosion resistance and good paint performance
Phosphoric acid treatment (excluding sealing treatment) + oilingVHas certain corrosion resistance, good paint performance, and prevents rust
OilOPrevent rust during transportation and storage
No treatmentMSuitable for immediate painting

 

Material comparison

Chinese standardJapanese standardEuropean standard
DX51D+Z/DC51D+Z (CR)SGCCDX51D+Z
DX52D+Z/DC52D+ZSGCD1DX52D+Z
DX53D+Z/DC53D+Z/DX54D+Z/DC54D+ZSGCD2/SGCD3DX53D+Z/DX54D+Z
S220/250/280/320/350/550GD+ZSGC340/400/440/490/570S220/250/280/320/350GD+Z
DX51D+Z/DD51D+Z (HR)SGHCDX51D+Z

FAQ

Q: Do you accept third-party inspection?

A: Yes, we absolutely accept it.

 

Q: Do you provide samples? Free or extra?

A: The cost of samples is calculated based on the value. Shipping fee is necessary.

 

Q: Do you have a large inventory of steel?

A: Yes, we have a large indoor warehouse with a total annual spot inventory of more than 200,000 tons.

 

 

Q: What is your delivery time and supply capacity?

A: The delivery time is usually within 15~28 working days, and we can supply about 10,000 tons per month.

 

Q: How to order?

A: Buyer sends inquiry-->Buyer gets quotation-->Order confirmation-->Buyer sends deposit-->Seller prepares goods-->Seller strictly inspects-->Buyer arranges balance payment-->Packaging and delivery.


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