Product Description
What are galvanised coils? And what are the classifications and uses?
Galvanised coils are thin steel sheets that have been dipped into a molten zinc bath so that a layer of zinc adheres to their surface.
Galvanised coils can be divided into hot rolled galvanised coils and cold rolled hot galvanised coils. They are mainly used in construction, household appliances, automobiles, containers, transportation and home industry. In particular, they are used in steel construction, automobile manufacturing and steel silo manufacturing.
They are characterised by strong corrosion resistance, good surface quality, ease of deep processing and economy.
Product Parameters
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Standard
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JIS G3302 / ASTM A653M / EN10327 / DIN17162
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Grade
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SGCC/DC51D/DX51D/DX52D/SGSS/SGCD1/SGCD2/SGCD3
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Thickness
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0.12-3.5 mm
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Width
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600-1250mm(normal size:914mm,1000mm,1200mm,1219mm,1250mm,1220mm)
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Spangle
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Regular spangle,Minimum spangle, Zero spangle, Big spangle
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Zinc coating
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30~275G/M2
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Hardness
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Soft hard(HRB60),medium hard(HRB60-85),full hard(HRB85-95)
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Coil ID
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508mm, 610mm
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Coil weight
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4-6 tons
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Packing
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Standard seaworthy export packing: waterproof paper+steel trippacked+wooden case seaworthy package
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Delivery
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Within 7-15days
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Regular Order
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25 tons or one container, for less quantity, to contact us for details
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Productivity
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20000 tons per month
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What is a "zinc bloom"?
A zinc bloom is a surface appearance of a hot-dip galvanised sheet and coil, which occurs when the steel strip is coated with liquid zinc after passing through the zinc pan, and the zinc grain nucleation subsequently grows during the natural solidification of the zinc layer.
Zinc bloom generation is influenced by the composition of the coating and the cooling rate/method. When hot-dip galvanised sheet products first emerged, steel mills were not able to control the size of the bloom as they wished, and the surface of the produced hot-dip galvanised pure zinc coils had various sizes and shapes of zinc bloom, which at one time led to the belief that "only those with zinc bloom are hot-dip galvanised".
As steel manufacturing has improved, the process of hot-dip galvanising of thin sheets now allows a degree of control over the formation of zinc bloom, which is defined by the major international standards in force.
Classification of zinc flowers:
The European Standard (EN) is divided into two categories (EN 10346):
1. normal zinc bloom (N): no control of the solidification process of the zinc layer is required and various sizes of zinc bloom or no bloom are allowed;
2. Mini zinc bloom (M): requires control of the solidification process of the zinc layer, obtaining small zinc blooms (usually not visible to the naked eye).
The classification of the Japanese standard JIS G3302 is closer to the European standard.
The American Standard ASTM classifies three categories (ASTM A653):
1. Normal zinc bloom: does not require control of the solidification process of the zinc layer, allowing various sizes of zinc bloom to be generated during the natural solidification process;
2. Small zinc bloom: requires control of the solidification process of the zinc layer to obtain a relatively uniform and small size of zinc bloom, but still visible to the naked eye;
3. Zero zinc bloom: control means to obtain a fine zinc bloom that is not visible to the naked eye.
The national standard GB/T 2518 classification is closer to the American standard.
Detailed Photos
It can be divided into the following categories according to production and processing methods:
1. Hot-dipped galvanized steel sheet.
The thin steel sheet is dipped into a molten zinc bath to make a thin steel sheet with a layer of zinc adhering to its surface. At present, the main use of continuous galvanizing process production, that is, rolls of steel continuously dipped in the molten zinc bath made of galvanized steel.
2. Alloy galvanised steel.
This type of steel is also manufactured by hot dipping, but immediately after leaving the bath, it is heated to around 500°C to produce an alloy of zinc and iron. This galvanised steel has good paint adhesion and weldability.
3. Electro-galvanised steel sheet.
This galvanised steel sheet is manufactured by the electroplating method and has good processability. However, the coating is thin and the corrosion resistance is not as good as that of hot dip galvanized steel.
4. Single-sided galvanized and double-sided galvanized steel sheets.
Single-sided galvanised steel sheets, i.e. products that are galvanised on one side only. It has better adaptability than double-sided galvanised sheet in terms of welding, painting, rust-proof treatment and processing. In order to overcome the shortcomings of uncoated zinc on one side, there is another galvanized sheet coated with a thin layer of zinc on the other side, i.e. double-sided galvanized sheet.
5. Alloy, composite galvanised steel.
It is made of zinc and other metals such as lead, zinc made of alloy or even composite plating into the steel plate. This steel sheet has both excellent rust resistance and good painting properties.
Packaging & Shipping
Packing: with bundles, seaworthy packing for sea transportation ( big order in bulk; small order packed by strips or as the
customers' requirement); wooden pallet or iron pallet is prerequisite for stainless products;
In terms of stainless products, we will use wooden pallet or iron pallet which has the polyethylene partition to isolate products which could protect the moisture.
The inner size of container is below:
20ftGP: 5.8m(length)x2.13m(width)x2.18m(high) about 24-26cbm, 28mts
40ftGP:11.8m(length)x2.13m(width)x2.18m(high) about 54cbm, 28mts
40ftHG:11.8m(length)x2.13m(width)x2.72m(high) about 68cbm, 28mts
Shipping term:
1) 20ft container: 26tons (Can load 5.8m Max)
2) 40ft container: 26tons (Can load 11.8m Max)
3) more than 100tons: can pack by bulk vessel
4) as your requirement.
Delivery: 7-15days after receiving unfront payment
Company Profile
COMPANY PROFILE
* Company Scale
Jinan Zunkai Materials Co., Ltd belongs to the Jinan Zunkai Group. Jinan Zunkai Group was founded in 2002, own ten branch companies. Including 3 foreign trade companies, 6 domestic trade companies and 1 steel pipe factory. Our annual sales amount has over one billion already.
* Company partner
Our company locate in Jinan City, Shandong Province. We entered into a strategic partnership with Jinan Steel, Laiwu Steel, Handan lron and Steel, Anyang lron and Steel, Maanshan lron and Steel and other domestic large steel companies.
* Business Scope
Zunkai is the largest steel agent in Shandong Province, we also have ourselves steel manufacturing factory, and our stock always no less than 10,000 tons.
Our company mainly engaged in: steel pipes, PPGl, galvanized steel coil, steel plate, stainless steel, H-beam, I-beam.angle, channel, round steel, all profiles. We always focus on the integration of resources, in line with the concept of win-win cooperation.
Factory
CERTIFICATE
1. Our company has the official export qualification and ISO 9001-2008 certification SGS, TÜV, Certification.
2. All products will be issued a quality inspection report(MTC) before leaving the factory.
3. We accept any third party inspection such as SGS to inspect the goods.
Our Partner
FAQ
1. who are we?
We are based in Shandong, China, start from 2016,sell to Domestic Market(20.00%),Southeast Asia(20.00%),South
America(10.00%),Eastern Asia(10.00%),Mid East(10.00%),Africa(10.00%),North America(10.00%),Eastern Europe(10.00%). There are total
about 101-200 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?
PPGI,Galvanized Steel Coil,Aluzinc Steel Coil,steel plate,Stainless Steel
4. why should you buy from us not from other suppliers?
JINAN ZUNKAI MATERIALS CO.,LTD located in Jinan, with annual sales amount One billion in 2019. Our main businesses are PPGI, GI, Aluzinc, Stainless Steel, Steel plates, angle steel etc.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,CIP;
Accepted Payment Currency:USD,EUR;
Accepted Payment Type: T/T,L/C,MoneyGram,Western Union,Cash;
Language Spoken:English,Chinese
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