High Quality Galvanized Steel Coil Cold Rolled Galvanized Coil for Building Materials

• Customization: Available
• After-sales Service: Can Contact Supplier Any Time
• Warranty: Can Contact Supplier Any Time
• Model NO.: Galvanized Steel Coil
• Certification: ISO
• Surface Treatment: Galvanized
• Technique: Cold Rolled
• Application: Gi Roofing Sheet, Structure Steel
• Stock: Stock
• Surface: Big Spangle, Small Spangle, No Spangle
• Coil Weight: 3-5tons
• MOQ: 16tons
• Width: 1250mm or Customized
• Zinc Coating: Z30-Z275
• Delivery Time: 5-7days
• Thickness: 0.12mm-6.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0 mm
• Por Name: Tianjin or Qingdao Port
• Shipping: Bulk or Container
• Mini Order: 10tons
• Packing: Sea Worth Packing
• Plate: We Can Also Cut Steel Plate
• Density: 7.85G/M2
• Useage: Industry/Machine/Decoration
• Spangle: Zero/Mini/Big/Regular Spangle
• Transport Package: by Vessel, Standard Export Packing
• Specification: 0.12~5.0 mm thickness
• Trademark: ZUNKAI
• Origin: Shandong
• HS Code: 7210490000
• Production Capacity: 100000 Tons Per Month

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 

JINAN ZUNKAI MATERIALS CO.,LTD STOCK LIST
PRODUCT NAME	GRADE	SIZE	COIL WEIGHT	WAREHOUSE
GI	DX51D + Z60	0.5*1000*C	8.755	Tianjin
GI	DX51D + Z60	0.5*1000*C	8.76	Tianjin
GI	DX51D + Z60	0.5*1000*C	8.644	Tianjin
GI	DX51D + Z60	0.5*1000*C	8.685	Tianjin
GI	DX51D + Z60	0.5*1000*C	8.688	Tianjin
GI	DX51D + Z60	0.5*1200*C	8.856	Tianjin
GI	DX51D + Z60	0.5*1200*C	9.02	Tianjin
GI	DX51D + Z60	0.5*1200*C	9.06	Tianjin
GI	DX51D + Z60	0.5*1200*C	9.065	Tianjin
GI	DX51D + Z60	0.5*1200*C	9.215	Tianjin
GI	DX51D + Z60	0.5*1200*C	11.997	Tianjin
GI	DX51D + Z60	0.5*1250*C	14.07	Tianjin
GI	DX51D + Z60	0.5*1250*C	14.365	Tianjin
GI	DX51D + Z60	0.5*1250*C	14.51	Tianjin
GI	DX51D + Z60	0.5*1485*C	14.64	Tianjin
GI	DX51D + Z60	0.5*1485*C	13.12	Tianjin
GI	DX51D + Z60	0.5*1485*C	9.295	Tianjin
GI	DX51D + Z60	0.5*1485*C	9.335	Tianjin
GI	DX51D + Z60	0.5*1485*C	9.56	Tianjin
GI	DX51D + Z60	0.5*1485*C	10.89	Tianjin
GI	DX51D + Z60	0.5*1485*C	11.51	Tianjin
GI	DX51D + Z60	0.5*1485*C	11.59	Tianjin
GI	DX51D + Z60	0.6*0960*C	12.87	Tianjin
GI	DX51D + Z60	0.6*0960*C	9.32	Tianjin
GI	DX51D + Z60	0.6*0960*C	9.32	Tianjin
GI	DX51D + Z60	0.6*0960*C	9.37	Tianjin
GI	DX51D + Z60	0.6*0960*C	9.39	Tianjin
GI	DX51D + Z60	0.6*1000*C	9.58	Tianjin
GI	DX51D + Z60	0.6*1000*C	9.84	Tianjin
GI	DX51D + Z60	0.6*1056*C	14.83	Tianjin
GI	DX51D + Z60	0.6*1057*C	9.365	Tianjin

                                                

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.

 

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

Jinan Zunkai Materials Co., Ltd founded in 2016 and we located in Shandong Province.  Our company has five departments in Shandong province and we have more than 200 employees.  Our main products include hot rolled coils, cold-rolled coils, GI, PPGI, AFP 55% Al galvalume coil, we also export structural beams, steel pipe and stainless steel etc. Our company's annual turnover is about 50 million US dollars, we also entered into strategic partnership with Bao steel, Laiwu steel, Rizhao steel, Anfeng steel, HBIS etc.

 

 

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