Hot-dip Zinc Coating Steel Building Roof Walls--High Strength

Hot-dip Zinc Coating Steel Building Roof Walls--High Strength System 1

Hot-dip Zinc Coating Steel Building Roof Walls--High Strength System 2

Hot-dip Zinc Coating Steel Building Roof Walls--High Strength

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 10000 m.t./month

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Hot-dip Zinc Coating Steel Building Roof Walls--High Strength

1.Structure of Hot-Dip Galvanized Steel Sheet Description：

Hot-dip galvanized steel coils are available with a pure zinc coating through the hot-dip galvanizing process. It offers the economy, strength and formability of steel combined with the corrosion resistance of zinc. The hot-dip process is the process by which steel gets coated in layers of zinc to protect against rust. It is especially useful for countless outdoor and industrial applications.

2.Main Features of the Hot-Dip Galvanized Steel Sheet：

• Excellent process capability

• Smooth and flat surface

• Workability, durability

• Excellent anticorrosive property

3.Hot-Dip Galvanized Steel Sheet Images

Hot-dip Zinc Coating Steel Building Roof Walls--High Strength

4.Hot-Dip Galvanized Steel Sheet Specification

Standard: ASTM, JIS,EN

Grade: CS, DX51D+Z,SGCC, SS 230~550,S220GD+Z~S550GD+Z, SGC340~SGC570

Thickness: 0.18mm~5mm

Width: max 2000mm

Coil weight:3-12 MT

Surface structure: zero spangle, regular spangle or minimum spangle

Surface treatment: Chromate treatment, Oiled/dry, skinpassed/non-skinpassed

Packing: Standard seaworthy export package

Technology test results:

Processability	Yield strength	Tensile strength	Elongation %	180°cold-bending
Common PV	-	270-500	-	d=0,intact,no zinc removal
Mechanical interlocking JY	-	270-500	-	d=0,intact,no zinc removal
Structure JG	>=240	>=370	>=18	d=0,intact,no zinc removal
Deep drawn SC	-	270-380	>=30	d=0,intact,no zinc removal
EDDQ SC	-	270-380	>=30	d=0,intact,no zinc removal

5.FAQ of Hot-Dip Galvanized Steel Sheet

We have organized several common questions for our clients，may help you sincerely：

1.How to guarantee the quality of the products？

We have established the international advanced quality management system，every link from raw material to final product we have strict quality test.

2. How long can we receive the product after purchase?

Usually within thirty working days after receiving buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15-30 days, but the shipment will depend on the vessel situation.

Q: I need to identify a metal. It is rusty so I suspect it is either iron or steel. Since they both have similar densities and are magnetic, how do I tell the difference betweeen steel and iron?: Steel is a refined, alloyed metal that is mostly iron. Iron, in a chemistry sense os simply Fe. In an industrial sense iron is pig iron commonly saturated with carbon, up to 4.5% and has other impurities like sulfur. Pig iron is brittle and should break rather easily, and bend very little. After a piece is broken look at the crystal structure, you should see rather small crystals. Most steel made for car body's, washing machines, file cabinets, low grade bolts and nuts etc. should flex and bend before breaking. Most steel made for things like cutting tools, axles, etc, is hardened and will chip and break rather than bend. Also you can try to heat the piece to a glowing orange temperature. It must be very hot. Cool it. If there is a lot of white flake scale on the piece it is impure and probably iron of some sort. In the end the only way exactly tell is have an analysis done and look at the chemistry.

Q: How do steel coils contribute to corrosion resistance in products?: Corrosion resistance in products is achieved through a combination of factors provided by steel coils. Firstly, the coils are typically constructed from stainless steel, which contains a high concentration of chromium. This chromium forms a passive film on the steel's surface, acting as a protective oxide layer that prevents corrosion. Furthermore, this film possesses the ability to self-heal, regenerating itself if damaged or scratched, thereby ensuring continuous corrosion protection. In addition, the steel coils undergo a process known as galvanization, which involves applying a layer of zinc to the steel's surface. This zinc layer functions as a sacrificial anode, corroding preferentially to the steel. This sacrificial corrosion shields the underlying steel, effectively preventing the formation of rust and other types of corrosion. Moreover, steel coils can be coated with various protective materials like epoxy or polyurethane to enhance their corrosion resistance. These coatings act as an additional physical barrier, preventing moisture, chemicals, and other corrosive elements from reaching the steel surface. Lastly, steel coils can be manufactured with specific alloying elements such as nickel or molybdenum, further enhancing their resistance to corrosion. These alloying elements bolster the strength and durability of the steel, enabling it to withstand harsh and corrosive environments more effectively. In summary, steel coils contribute to the corrosion resistance of products by utilizing stainless steel, galvanization, protective coatings, and alloying elements. The implementation of these measures ensures that products retain their structural integrity and appearance over time, even under demanding and corrosive conditions.

Q: How are steel coils used in the production of metal cladding?: Steel coils are used in the production of metal cladding as a primary raw material. Metal cladding refers to the process of covering a building's exterior with a layer of metal, typically steel, to enhance its durability, aesthetics, and insulation properties. Steel coils serve as the starting point for the manufacturing of metal cladding. These coils are typically made of galvanized steel, which is steel coated with a layer of zinc to protect it from corrosion. The coils are unrolled and fed into a roll-forming machine, where they are shaped into the desired profile for the metal cladding panels. Once the steel coils are formed into the required shape, they undergo various processes to enhance their properties. These processes may include cutting, perforating, and embossing to create patterns, textures, or openings in the cladding panels. The coils can also be coated with additional protective layers, such as paint or powder coating, to provide additional corrosion resistance and aesthetic appeal. The shaped and processed steel coils are then assembled into metal cladding panels. These panels are designed to interlock with each other, creating a seamless and visually appealing exterior for buildings. The panels can be attached to the building's structure using various methods, such as screws, clips, or adhesives. The use of steel coils in metal cladding production offers several advantages. Steel is a strong and durable material, making it suitable for exterior applications that require resistance to weathering, impact, and other environmental factors. Additionally, steel is highly versatile, allowing for a wide range of design options and customization. In conclusion, steel coils play a crucial role in the production of metal cladding. They serve as the raw material, which is shaped, processed, and assembled into panels that provide buildings with enhanced protection, aesthetics, and insulation properties.

Q: How are steel coils processed and shaped for specific applications?: Steel coils are processed and shaped for specific applications through a series of steps. First, the coils are uncoiled and flattened to remove any bends or curls. Then, they undergo various processes such as cutting, slitting, or shearing to achieve the desired dimensions. Next, the steel is often subjected to heat treatment, such as annealing or tempering, to enhance its strength and flexibility. Finally, the steel is shaped into specific forms using techniques like rolling, bending, or stamping, to meet the requirements of different applications ranging from automotive parts to construction materials.

Q: Can steel coils be perforated?: Yes, steel coils can be perforated.

Q: I do a lot of scrapping and would like to be able to separate stainless steel from regular steel. The magnet test doesn't always work since stainless can be magnetic, but what are some ways that I can for sure tell the difference? Or even something like a sound that they make that may help me to tell the difference.: Stainless steel should be non-magnetic.

Q: How are steel coils straightened?: Steel coils are straightened through a process called leveling, which involves passing the coils through a series of rollers that apply pressure to remove any bends or curves. This process effectively straightens the steel coils, making them ready for further processing or use in various applications.

Q: How are steel coils coated to prevent corrosion?: Steel coils are coated to prevent corrosion through a process known as galvanization. This involves applying a protective layer of zinc onto the surface of the steel coils. The zinc acts as a barrier, preventing the steel from coming into contact with moisture and oxygen, which are the main causes of corrosion. This coating not only provides excellent corrosion resistance but also enhances the durability and longevity of the steel coils.

Q: Why do we galvanise steel? Galvanised steel is steel coated with zinc.: We galvanize steel to protect and prevent steel from rusting or corrosion. Rusting, for the most part is a layman's term that has been used exclusively to describe the chemical OXIDATION reaction of steel or iron with oxygen forming a reddish brown substance called rust. Zinc metal coating also oxidizes but does not form the reddish brown rust. Instead, it forms an oxide, just like the rust, which is iron oxide. The protection created by zinc is because it is more reactive to oxidizers, than steel or iron. Thus, the oxidizer will react with Zinc first before it will react with Iron, hence protecting iron. If the zinc is fully reacted then iron is next. BUT, the zinc oxide formed on the surface of the steel or iron is no longer reactive to oxygen and also creates a good physical barrier so that oxygen will not have chance to even have contact with the underlying steel. Isn't that neat! Here is chemistry at one of its useful best.

Q: What are the common problems encountered with steel coils during production?: There are several common problems encountered with steel coils during production. One of the most common issues is coil slippage, where the coils shift or slide out of place during handling or transportation. This can result in damage to the coils or pose a safety risk to workers. Another common problem is coil rusting or corrosion. Steel coils are susceptible to rusting if they come into contact with moisture or are not properly protected. Rust can compromise the structural integrity of the coils and lead to product defects or failure. Coil breakage is also a common problem. This occurs when the coils are subjected to excessive stress or tension, causing them to crack or break. Coil breakage can result from improper handling or storage, as well as production issues such as improper rolling or cooling processes. Coil surface defects are another common issue. These defects can include scratches, dents, or uneven surfaces on the coils. Surface defects can compromise the appearance and quality of the final product, making it unsuitable for certain applications. Lastly, coil contamination is a problem that can occur during production. Contaminants such as dirt, oil, or foreign particles can adhere to the surface of the coils, leading to quality issues or difficulties in further processing. Contamination can result from improper handling, inadequate cleaning processes, or poor environmental control. To mitigate these common problems, proper handling and storage practices are essential. This includes using appropriate lifting and transporting equipment, ensuring the coils are stored in a dry and clean environment, and implementing effective rust prevention measures. Regular inspections and quality control checks can also help identify and address any issues early on, preventing further damage and ensuring the production of high-quality steel coils.

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