Dx51d Z30-Z275 Hot Dipped Gi Gp Galvanized Steel Plate Coil

Product Description

Galvanized Steel coil

Product Description

 

Galvanizing Steel coil is a thin steel sheet dipped into a molten zinc tank to make its surface adhere to a layer of zinc.The main use of continuous galvanized process production, that is, the roll of steel plate continuous dip in the melting zinc plating tank made of galvanized steel.

Galvanized coil has the characteristics of strong corrosion resistance and good surface quality, and is widely used in construction, home appliances, automobiles, containers, transportation and other fields.


 

Standard	ASTM, AISI, DIN, GB, EN, JIS etc
Grade	SGCC, DC51D, DX51D, DX52D, SGCD, SGHC, DX54D, S350GD, S450GD, S550GD etc
Thickness	0.12mm-4.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0mm,etc
Width	600mm, 762mm, 914mm, 1000mm, 1200mm, 1219mm, 1250mm, 1500mm
Zinc Coating	Z30g-Z275g /m2, or as clients required
Spangle	Zero spangle, regular spangle or normal spangle
Hardness	Soft or hardness, as clients required.
Surface treatment	Chromated and oiled, chromated and non-oiled, Anti-finger
Packing	Waterproof paper+plastic film+iron packing+bundling or as per customers request.
Coil Weight	3-8MT or as per requirement.
Application	Corrugated steel sheet,Ceiling channel,industrial refrigeration,cold storage,door panel,sandwich panel,PU panel,writing board,PCM steel plate
Brand	Tangsteel, HY, Ansteel, Tisco and other for thin size.
Payment	T/T, L/C at sigth.
Delivery Time	In 15-30 after receipt advance or LC
Min order	25 Mt (one 20ft FCL)

 

 

There are many factors affecting the size of zinc flowers. When the zinc liquid composition has the conditions for the formation of zinc flowers, the following factors will affect the size of zinc flowers:

(1) Raw material: the thicker the raw material steel plate, the smaller the surface roughness, the larger the zinc flower.
(2) Cooling rate: the faster the cooling rate, the shorter the crystal growth time, the smaller the zinc flower.
(3) Number of crystal nuclei: The size of zinc flower is closely related to the number of crystal nuclei of zinc flower. When the surface of steel base is rough or the surface cleanliness is poor, the zinc flower is relatively small. Zinc grains are formed on steel base, and the more nuclei there are, the smaller the zinc flowers will be. This principle is used in the production process of small zinc flowers.
(4) Other factors (production environment, etc.).

Detailed Photos

Galvanized Steel Sheet is defined as a carbon steel sheet coated with zinc on both sides. Galvanized Steel Coil Importer produce galvanized steel with two main processes: continuous hot dip galvanizing and electrogalvanizing.

The hot dip process includes passing the steel through a molten zinc bath, and the electrogalvanizing process includes applying zinc through electrolytic treatment. As a result, the zinc layer is firmly adhered to the base metal through the iron-zinc bonding layer. Our hot-dip galvanized products are manufactured in accordance with specifications, and our electro-galvanized products comply with the specifications.

Galvanizing is one of the most effective and economical methods for protecting bare steel from corrosive environments. Zinc is not only a barrier between steel and the environment, but also sacrifices itself to protect the steel plate below. When two different metals are in contact and coupled with water and oxygen, sacrifice or current protection occurs. Zinc preferentially corrodes iron in steel. This protection prevents corrosion of the steel in areas not covered by zinc. Therefore, the diffusion of corrosion from cutting edges, drilling holes, etc. is minimized.

Metal type	Grade	CHEMICAL COMPOSITION %
		C	Si	Mn	P
cold rolled steel sheet	DC51D+Z (St01Z, St02Z, St03Z) , DC51D+ZF	≤0.10	-	≤0.50	≤0.035
	DC52D+Z (St04Z), DC52D+ZF	≤0.08	-	≤0.45	≤0.030
	DC53D+Z (St05Z), DC53D+ZF	≤0.08	-	≤0.40	≤0.030
	DC54D+Z (St06Z), DC54D+ZF	≤0.01	≤0.10	≤0.30	≤0.025
	DC56D+Z (St07Z), DC56D+ZF	≤0.01	≤0.10	≤0.30	≤0.025
hot rolled steel sheet	DD51D+Z (St01ZR, St02ZR)	≤0.10	-	≤0.50	≤0.035
	DD54D+Z (St06ZR)	≤0.01	≤0.10	≤0.30	≤0.025

SURFACE  WITH SPANGLE 

                                                

SURFACE WITHOUT SPANGLE


 

Surface treatment of galvanized coils
1. Passivation C
2. Oil O
3. Lacquer seal L
4. Phosphating P
5. Do not process U

1 passivation
The galvanized layer is passivated to reduce folding corrosion (white rust) under tidal temperature storage and transportation conditions. However, the anti-corrosion performance of this chemical treatment is limited and, moreover, hinders the adhesion of most paints. This kind of treatment is generally not used in the zinc-iron alloy coating. Except for the smooth surface, as a routine, the manufacturer conducts passivation treatment on other types of zinc coating.
2 oiled
Oiling can reduce steel plate corrosion under wet storage and transportation conditions, and re-oiling steel plates and steel strips after passivation treatment will further reduce corrosion under wet storage conditions. The oil layer should be able to be removed with a degreasing agent that does not damage the zinc layer.
3 paint seal
An additional corrosion protection, especially anti-fingerprint properties, can be provided by applying a very thin film of transparent organic coating. Improves lubricity when forming and acts as an adhesion primer for subsequent coats.
4 Phosphating
Through phosphating treatment, galvanized steel sheets of various coating types can be coated without further treatment except for normal cleaning. This treatment can improve the adhesion and anti-corrosion performance of the coating, and reduce the risk of corrosion during storage and transportation. After phosphating, it can be used with a suitable lubricant to improve the forming performance.
not deal with
The steel plates and strips supplied according to this standard may not be passivated or oiled or painted or phosphating and other surface treatments are required only if the orderer puts forward a request not to be treated and is responsible for it.

Application

Generally used in building exterior walls, such as glass curtain walls, marble curtain walls, aluminum curtain walls as columns and stress materials, or for outdoor telecommunication towers, highways and other open-air construction steel called galvanized steel

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Quality Control

 

Why do galvanized coils cause white rust and black rust?

The causes of white rust and black spots are as follows: black spots are formed by further oxidation of white rust.
The main causes of white rust are:
(1) Poor passivation, insufficient or uneven passivation film thickness;
(2) The surface is not oiled or there is residual moisture on the strip surface;
(3) The surface of the strip steel contains moisture during coiling;
(4) The passivation is not completely dried;
(5) Damp or rain during transportation or storage;
(6) The storage time of finished products is too long;
(7) The galvanized sheet is in contact with or stored together with other corrosive media such as acid and alkali.

The finished product is allowed to be stored in the warehouse for up to three months to avoid oxidation caused by long-term storage. Therefore, in order to ensure the quality of use and prolong the service life of galvanizing, we should avoid the above factors that cause rust.

Our core product advantages:

1. Genuine hot-dip galvanizing process for longer corrosion resistance:
All products utilize a high-temperature hot-dip galvanizing process, unlike inferior products that are cold-galvanized or electro-galvanized. The zinc layer has extremely strong penetration and adhesion, preventing peeling, flaking, and powdering.

2. High-quality, flawless surface, high yield rate:
The substrate is smooth and fine, with a uniform and bright zinc coating, free of zinc slag, uncoated areas, black spots, scratches, and wavy edges. The sheet material has uniform toughness, making it less prone to cracking and zinc loss during bending, stamping, drilling, and welding.

3. Comprehensive Specifications, Adapting to Multiple Industry Needs:
Covering a full range of specifications including thin decorative coils, medium-thick structural coils, and high-zinc anti-corrosion coils, with various surface treatments such as patterned, unpatterned, and fingerprint-resistant options, meeting the appearance requirements of home appliances, decoration, and precision hardware processing, as well as the durability requirements of outdoor steel structures, pipelines, and anti-corrosion projects.

4. Ample Stock, Fast Delivery:
Owning a large professional galvanized coil storage area, maintaining thousands of tons of stock, allowing for immediate delivery of standard thicknesses, zinc coatings, and widths, eliminating lengthy production delays.

5. Direct Supply from the Factory, Higher Cost-Effectiveness:
Direct factory shipments eliminate intermediaries, resulting in more competitive pricing for the same process, zinc coating, and quality. Long-term partners enjoy bulk discounts. Strict quality control ensures transparent and cost-effective procurement, preventing the use of inferior materials or low-zinc materials disguised as high-zinc ones.

 

Packaging & Shipping

1.Packing :3 layers of packaging, kraft paper inside, water plastic film in the middle, the outermost GI steel plate tied with steel belt or as required.

2.Shipping port: Tianjin/Shanghai/Qingdao
3.Shipment:
a. Length: ≤6m, loaded in 20GP Container.
b. Length: ≤12m, loaded in 40GP Container.
Remark: Size of 20GP Container (inside :5898*2352*2393mm)
Size of 40GP Container (inside:12032*2352*2393mm)
Size of 40HQ Container (inside:12032*2352*2698mm)
4.Delivery time: Within 7-15 days, depending on the situation

Company Profile

ZK Steel Group is a large multinational steel resource group based in Shandong, China. Founded in 2010 and exporting worldwide since 2016, the Group achieves an annual turnover of RMB 5 billion, with each branch maintaining a stable monthly export volume of 20,000-40,000 tons - ranking among the leading steel exporters in Shandong.

Global Industrial Layout  

• Domestic network - four branch offices in Guangzhou, Hainan, Suzhou & Yiwu, plus a self-owned modular house factory in Dezhou.
• Overseas presence - self-built steel pipe production bases in Egypt & Syria; direct offices in Peru & Iran, covering the Middle East and South America.

Full Self-owned Production Capacity  

• Self-production of galvanized (GI) and PPGI / PPGL steel coils.
• Stainless steel deep processing - precision cutting, film lamination & surface treatment.
• Customized steel structures & modular houses - integrated design and manufacturing.

First-tier Authorized Agent of Top Steel Mills 

• Direct supply from Nippon Steel, Shougang, Rizhao Steel & Laigang (full product range).
• Core products: HRC, CRC, stainless steel, steel pipes, H-beams & steel profiles.
• Special materials - tool steel, silicon steel, alloy steel & complete supporting accessories.

Core Positioning 
As a full-industry-chain steel resource integration specialist, We connects direct mill sourcing, self-owned manufacturing, multi-category deep processing, nationwide warehousing, local overseas production and global project installation. One partner, one-stop solutions - from material selection and customized processing to bulk export and on-site installation - saving customers time on communication, comparison, logistics and after-sales, while leveraging group-scale advantages for stable quality, punctual delivery and competitive pricing.
Stable steel solutions for clients in more than 50 countries - for over a decade.

 

 

FAQ

 

 

1. who are we?
We are based in Shandong, China, start from 2016,sell to South America(20.00%),Africa(20.00%),Southeast Asia(15.00%),Central America(10.00%),North America(5.00%),Oceania(5.00%),Mid East(5.00%),Eastern Asia(5.00%),Western Europe(5.00%),South Asia(5.00%),Domestic Market(5.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Galvanized Steel,Corrugated Roofing Sheet,Galvanized Coil,PPGI,Steel Plate,Steel Stainless

4. why should you buy from us not from other suppliers?
Jinan Zunkai Group founded in 2002, with five branch companies and is well-funded. Mainly engaged in : PPGI ,galvanized steel , steel plate , round bar, steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,I beam, angle, Channel flat steel

5. what services can we provide?
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FCA;
Accepted Payment Currency:USD, EUR, JPY, HKD, CHF;
Accepted Payment Type: T/T, L/C, MoneyGram, Credit Card, PayPal, Western Union, Cash