HOT-DIP ALUZINC STEEL

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

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Supply Capability:: 12000 m.t./month

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HOT-DIP GALVANIZED/ ALUZINC STEEL in China

THICKNESS：0.18mm-1.5mm

WIDTH：900mm-1250mm

COATING MASS：AZ30-AZ150

SPANGLE：Minimized Spangle，Zero Spangle

SURFACE TREATMENT：N0on or Chromated,Non or Oiled,Non or Anti Finger Print

COIL INNER DIAMETER：508mm/610mm

COIL WEIGHT：3mt-7m

In continuous units in cold rolled steel strip, galvanized steel (electro galvanized and hot dip galvanized) as substrate, after surface pretreatment (degreasing and science processing), using the method of roll coating, coated with a layer or multi-layer liquid coating of plate, after baking and cooling income is the coating steel plate. Because the coating can have a variety of colors, on the habits of the coated steel sheet is called color coating steel plate. Because the coating is carried out before the sheet metal forming, in foreign countries which is called pre coating plate.

Color coated steel sheet is an organic coating coating on the steel surface, it has the advantages of beautiful appearance, bright color, high strength, good corrosion resistance, easy processing molding, but also allows the user to reduce costs, reduce pollution.

From the United States in 1935 to establish the first continuously coated steel line to begin, color coated steel plate has been widely applied, the current color coated plate varieties, about more than 600 kinds, the advantages of color coated sheet and organic polymer and steel plate of the two, which has good colorability, organic polymer molding, corrosion resistance and decorative, and steel plate with high strength and easy processing, can easily be punching cutting, bending, deep drawing processing. Made this makes organic coated steel sheet products have excellent practical, decorative, workability, durability.

(1) normal spangle coating spangle coating

Zinc layer in normal during the solidification process of Zn grains grew up, freeforming has obvious flower morphology of zinc coating.

(2) small zinc flower coating minimized spangle coating

Zinc coating in the process of solidification, zinc grain was artificially restricted,as far as possible into small zinc flower coating.

(3) no zinc flower coating spangle-free

By adjusting the chemical composition of the plating solution obtained, has novisible zinc flower morphology, uniform coating surface.

(4) of Zn Fe alloy coating zinc-iron alloy coating

Heat treatment of steel by liquid groove after galvanizing, the alloy layer of the whole generation of zinc and iron coating, the coating appearance is dark gray, no metallic luster, easy to fly in severe forming process, suitable for cleaning in addition to general, without further treatment can be directly paintcoating.

(5) differential coated differential coating

On both sides of the galvanized steel, requires different weight of zinc coatinglayer.

(6) finishing skin pass

Finishing is the following one or several kinds of objective, cold rolling a tinydeformation of the galvanized steel sheet.

The improvement of the galvanized steel surface appearance or suitable for decorative coatings; make the product not see slip line problem (Lv Desi line)or creases temporary minimized etc..

Q: What are the different methods of punching steel coils?: There are several methods of punching steel coils, including mechanical punching, hydraulic punching, and laser punching. Mechanical punching involves the use of a mechanical press with a punch and die set to create holes or shapes in the steel coil. Hydraulic punching utilizes hydraulic force to drive a punch through the coil, providing high precision and speed. Laser punching, on the other hand, uses a laser beam to cut or form holes in the steel coil, offering great flexibility and accuracy. Each method has its own advantages and suitability depending on the specific requirements of the application.

Q: What are the challenges in coil slitting for narrow strip widths?: There are several challenges associated with coil slitting for narrow strip widths. One of the main challenges is maintaining accuracy and precision during the slitting process. When dealing with narrow strip widths, even the slightest misalignment or deviation can result in significant defects or inconsistencies in the final product. This requires careful calibration and adjustment of the slitting equipment to ensure that the strips are cut with utmost accuracy. Another challenge is the risk of material damage or deformation during the slitting process. Narrow strip widths are more prone to distortion, wrinkling, or edge cracking, especially if the material is not properly handled or supported during slitting. Special care must be taken to ensure that the material is fed smoothly through the slitting machine and that the tension is properly controlled to minimize any potential damage. Additionally, narrow strip widths can pose challenges in terms of handling and transporting the slit coils. These coils are more susceptible to bending, twisting, or telescoping, which can lead to difficulties in stacking, storage, or transportation. Proper packaging and handling techniques must be employed to ensure that the slit coils maintain their shape and integrity throughout the supply chain. Furthermore, narrow strip widths often require more frequent blade changes during the slitting process. This increases the complexity and time required for setup and maintenance, as the blades need to be carefully selected and replaced to achieve optimal cutting results. It is crucial to have skilled technicians who can handle these blade changes efficiently and effectively. Overall, while coil slitting for narrow strip widths offers various benefits such as cost savings and increased material utilization, it also presents several challenges that need to be carefully addressed. These challenges include maintaining accuracy, preventing material damage, ensuring proper handling and transportation, and managing blade changes effectively. By understanding and addressing these challenges, manufacturers can optimize their coil slitting operations and produce high-quality narrow strip products.

Q: How are steel coils inspected for oil or rust residues?: Oil or rust residues in steel coils are examined through a series of visual and physical checks. Trained personnel conduct the initial visual inspection, closely scrutinizing the steel surface for any indications of oil or rust residues. They look for discolouration, stains, or any unusual signs that could suggest the presence of contaminants. Besides the visual inspection, different techniques are employed to detect oil or rust residues. One commonly used method is solvent cleaning. A solvent is applied to the steel coil's surface, and if there are any oil or rust residues, they will dissolve and become visible. This enables inspectors to identify and eliminate any contaminants. Ultrasonic testing is another technique used for inspection. Ultrasonic waves are transmitted through the steel coil, and any variations in the reflections of these waves can indicate the presence of oil or rust residues. This non-destructive testing method provides a more comprehensive analysis of the steel's condition, ensuring a thorough inspection. In addition, specialized equipment such as magnetic particle inspection or eddy current testing may be utilized. Magnetic particle inspection involves applying magnetic particles to the steel surface, which will gather around areas with oil or rust residues. Similarly, eddy current testing employs electromagnetic induction to identify surface irregularities caused by contaminants. Overall, a combination of visual inspection and various testing techniques is employed to ensure a meticulous examination of steel coils for oil or rust residues. These rigorous inspections guarantee that the coils meet the required quality standards and are free from any contaminants that may compromise their performance or durability.

Q: What are the common applications of cold-rolled steel coils?: Cold-rolled steel coils are commonly used in various applications such as automotive components, appliances, construction materials, and general manufacturing.

Q: Which one has more electrical resistivity? Wood or steel? And why?I know that the resistivity depends on the material of the conductor, but i want a perfect explaination please.Thnx in advance :): Steel is a conductor while wood is an insulator. There are no free electrons available in wood for conduction of electricity to take place. So wood has more electrical resistivity than that of steel.

Q: What are the different types of steel coil surface treatments for indoor applications?: There are several different types of steel coil surface treatments that are suitable for indoor applications. These treatments are designed to enhance the appearance, durability, and performance of the steel coil in various indoor environments. Some of the common surface treatments for indoor applications include: 1. Galvanized Coating: This is one of the most popular surface treatments for indoor applications. Galvanizing involves applying a layer of zinc to the steel coil, which provides excellent corrosion resistance and protects the steel from environmental elements. 2. Pre-painted Coating: Pre-painting the steel coil with a specific color or finish is another common surface treatment for indoor applications. This coating not only improves the aesthetics of the steel, but also provides additional protection against corrosion and wear. 3. Powder Coating: Powder coating is a process where a dry powder is electrostatically applied to the steel coil and then cured under heat. This treatment creates a durable and attractive finish that is resistant to chipping, scratching, and fading. Powder coating is available in a wide range of colors and textures, making it a versatile choice for indoor applications. 4. Vinyl Coating: Vinyl coating is a type of surface treatment that involves applying a layer of PVC (polyvinyl chloride) to the steel coil. This coating provides excellent chemical resistance and protects the steel from moisture, abrasion, and UV radiation. Vinyl coating is commonly used in indoor applications where chemical exposure or moisture resistance is a concern. 5. Laminated Coating: Laminating the steel coil involves bonding a thin layer of plastic or other material to the surface of the steel. This treatment enhances the appearance of the steel and provides additional protection against scratches, stains, and fading. Laminated coatings are available in various colors and patterns, making them suitable for indoor applications where aesthetics is a priority. It is important to consider the specific requirements of the indoor application when choosing a steel coil surface treatment. Factors such as corrosion resistance, durability, aesthetics, and budget should be taken into account to ensure the best possible performance and longevity of the steel coil in indoor environments.

Q: What are the different types of steel alloys used in coils?: There are several different types of steel alloys commonly used in coils, each with its own unique properties and characteristics. Some of the most common types include: 1. Carbon Steel: This is the most basic and widely used type of steel alloy in coils. It contains a low amount of carbon and is known for its strength and durability. Carbon steel coils are often used in applications where high strength is required, such as automotive parts, construction materials, and machinery components. 2. Stainless Steel: Stainless steel coils are made from an alloy of iron, chromium, and other elements. They are highly corrosion-resistant and have excellent strength and heat resistance properties. Stainless steel coils are commonly used in applications where resistance to corrosion and staining is important, such as kitchen appliances, medical equipment, and transportation components. 3. Galvanized Steel: Galvanized steel coils are made by coating regular carbon steel with a layer of zinc. This coating provides excellent corrosion resistance and protects the underlying steel from rusting. Galvanized steel coils are commonly used in outdoor applications, such as roofing, fencing, and automotive body parts. 4. Alloy Steel: Alloy steel coils are made by adding various alloying elements, such as manganese, nickel, chromium, or molybdenum, to carbon steel. This enhances the strength, hardness, and wear resistance of the steel. Alloy steel coils are often used in applications where high strength and toughness are required, such as in the manufacturing of machinery, tools, and construction equipment. 5. Electrical Steel: Electrical steel coils are specifically designed for use in electrical equipment, such as transformers and electric motors. They have low electrical resistance and high magnetic permeability, allowing them to efficiently conduct electricity and create magnetic fields. Electrical steel coils are typically made from a silicon alloy, which improves their electrical and magnetic properties. Overall, the choice of steel alloy for coils depends on the specific requirements of the application, such as strength, corrosion resistance, electrical conductivity, or heat resistance.

Q: What are the dimensions of steel coils used in the building materials industry?: The dimensions of steel coils used in the building materials industry can vary depending on the specific requirements of the project. However, common dimensions for steel coils in this industry range from 0.15mm to 3.5mm in thickness and 600mm to 2000mm in width. The length of the coils can also vary, typically ranging from 1000mm to 6000mm.

Q: Steel resist tension. Then why we provide steel in compression zone ?: There are several reasons to add compression steel. Keep in mind, supported steel (meaning it can't buckle) resists compression as well. Compression steel helps reduce long term deflections. Concrete creeps under sustained loads. Steel lessens the compression, meaning less sustained compressive stress to cause creep deflection. It makes members more ductile. Since the steel takes some of the compressive stress, the compression block depth is reduced, increasing the strain in the tension steel at failure, resulting in more ductile behavior (the moment at first yield remains largely the same with compression steel added, but the increase in capacity after yield is significant). Compression steel insures that the tension steel yields before the concrete crushes, meaning it helps change the failure mode to tension controlled. It makes beams easier to construct. With bars in the top and bottom, you have longitudinal reinforcement in all 4 corners of the shear stirrups to keep them in place when pouring the concrete. Also, for continuous members, its often easier to run your negative moment steel the full length of the beam rather than trying to cut it off in the positive moment regions. Serviceability concerns. You're going to end up putting steel in that region anyway to for temperature and shrinkage.

Q: Heard some steel companies like TATA Steel and JSW are in good performance. can some one suggest me if its good time to invest in steel industry ?: To be blunt, with the Environmental-Terrorists like Green Peace and The Sierra Club making it basically impossible for Steel Production in the US to be a profitable industry, you are better off investing in Chinese Steel Companies than American. Same goes for Electricity Production and Petroleum Refining... These Environmental Terrorist Organizations and their misguided leftist followers have made it impossible to build new refineries in the US, which is why the price of Diesel Fuel is so much higher than unleaded, which is not only insane since Diesel Fuel actually requires LESS processing to be a viable product but also because our Transportation Industry as a whole relies upon Diesel Fuel to get everything in your home and office from manufacturer to store. By keeping the Energy Industry held hostage to these irresponsible and, to be blunt, insane laws, they have caused a rise in the price of EVERYTHING sold in the United States... From a deck of cards to homes. If we were not basically banned from building new Nuclear Reactors, we could cut our dependance on Coal by at least half... Anything having to do with any industry that could even potentially do with Pollution, regardless of how far advanced the technology has advanced away from that, it is restricted by Eco-Terrorists and mindless sheep that spend too much time listening to propaganda rather than fact checking what their Masters spoon feed them.

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