PREPAINTED GALVANIZED STEELCOIL System 1

PREPAINTED GALVANIZED STEELCOIL

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Product Description:

Specification

1. Thickness: 0.3-0.8mm

2. Width: 914-1250mm

3. Inner Diameter: 508mm

4. Weight of Steel Coil: 3-15MT

5. Available Dipped Layer: 50-150g/m²

6. Surface Texture: Normal Coated

7. Type of coating structure: 2/1 Coat the top surface of the steel sheet twice, coat the bottom surface once, and bake the sheet twice.

8. Front Side Paint Thickness: 15-25μm (bottom paint+top paint)

9. Back Side Paint Thickness: 5-10μm

Mechanical Properties

1. Mechanical properties of base metals

Grade	Tensile Test
Grade	Yield Strength MPa	Tensile Strength MPa	Elongation A80mm % ≥
SGCC	140-350	270-500	22
SGCD	140-300	270-420	26
SGCE	140-260	270-380	30

2. Common performance of front coating

(1). Thickness: ≥20μm

(2). Pencil Hardness: 2H

(3). 60° specular glossiness of coating: >60

(4). 180°bend: ≤3T

(5). Impact: ≥9J

(6). Salt Fog Resistant: ≥500h

(7). Color difference: <3ΔE

Q: What are the different types of steel coil cutting processes?: There are several different types of steel coil cutting processes, including shearing, slitting, and laser cutting.

Q: What are the different methods of slitting steel coils?: There are several different methods of slitting steel coils, each with its own advantages and limitations. Some of the most common methods include: 1. Rotary Shear Slitting: This method involves using rotating knives to cut the steel coil into narrower strips. It is a versatile and efficient method that allows for high-speed production and precise slitting. Rotary shear slitting is commonly used for thinner gauge materials. 2. Looping Pit Slitting: In this method, the steel coil passes through a looping pit where it is guided and tensioned before being slit. It is suitable for thicker gauge materials and provides good edge quality. Looping pit slitting allows for higher coil speeds and can handle heavier coils. 3. Drag Slitting: This method involves dragging the steel coil over a stationary blade or set of blades to perform the slitting. It is particularly useful for materials that are difficult to slit, such as high-strength steels. Drag slitting provides excellent edge quality and is often used for precision slitting applications. 4. Crush Slitting: Crush slitting involves applying pressure to the steel coil to crush and separate it into narrower strips. It is a cost-effective method suitable for lower gauge materials. However, it may result in slightly rougher edge quality compared to other methods. 5. Laser Slitting: Laser slitting utilizes a focused laser beam to cut through the steel coil. It is a highly precise method that offers excellent edge quality and minimal distortion. Laser slitting is commonly used for high-value and specialty materials. Each method has its own advantages and is suitable for specific applications and material types. The choice of slitting method depends on factors such as material thickness, desired edge quality, production speed requirements, and budget.

Q: How are steel coils tested for quality?: Steel coils are tested for quality through a variety of methods, including visual inspections, measurements of dimension and weight, and mechanical tests such as tensile strength and hardness. Additionally, non-destructive testing techniques like ultrasonic or magnetic particle testing may be used to detect any potential defects or flaws within the coils. These comprehensive testing procedures ensure that the steel coils meet the required quality standards before they are used in various industries.

Q: What are the challenges in coil slitting?: Coil slitting, a method used to divide large metal coils into narrower strips of desired widths, has its advantages in terms of efficiency and flexibility. However, it also comes with several challenges. One of the primary obstacles in coil slitting is the need to ensure consistent strip width accuracy. To achieve this, it is crucial to maintain uniform width measurements throughout the process. Any deviation in strip width can have downstream effects on the production line, impacting the quality and functionality of the final product. Overcoming this challenge requires the use of precise slitting equipment and careful monitoring of process parameters. Another challenge lies in managing the quality of the strip edges. The edges of the slit strips play a critical role, particularly in applications where they must be free from imperfections like burrs. Attaining clean and smooth edges necessitates proper blade selection, positioning, and maintenance. Any defects or irregularities on the strip edges can affect subsequent processes such as bending, welding, or coating. Additionally, the type of material being slit can pose challenges. Certain metals, such as high-strength steels or alloys, may be more difficult to cut due to their hardness or brittleness. Slitting these materials can result in blade wear and premature failure, leading to increased downtime and maintenance costs. Moreover, the presence of contaminants or surface defects on the coil can also impact the slitting process, requiring additional cleaning or preparation steps. Handling and processing large coils present another significant challenge. Coils can be cumbersome and heavy, necessitating proper equipment and procedures to ensure safe handling. Furthermore, the slitting process generates a significant amount of scrap material, which needs to be efficiently managed and disposed of. Proper storage, transportation, and recycling of the scrap are essential to minimize waste and maintain a clean and organized working environment. In conclusion, coil slitting offers benefits in terms of customization and productivity. However, it also poses challenges in maintaining strip width accuracy, managing edge quality, dealing with difficult materials, and handling large coils and scrap. Overcoming these challenges requires expertise, precision equipment, and careful process control to ensure the desired quality and efficiency in coil slitting operations.

Q: What are the common applications of galvanized steel coils?: Galvanized steel coils are commonly used in a variety of applications, including construction, automotive manufacturing, electrical appliances, and agricultural equipment. They are particularly useful for roofing and siding materials, as well as for creating durable and corrosion-resistant components in various industries.

Q: (I'm not sure if steel is in fact a mineral)But I want to know if .. Last say topaz is stronger/harder then steel: Mineral ≠ metal Strong ≠ hard Even after you learn what the words mean, the only straight answer is still Look and see.

Q: What are the different methods of joining steel coils?: There are several methods used for joining steel coils, including welding, brazing, soldering, and mechanical fastening. Welding is the most common method, which involves melting the edges of the coils and fusing them together. Brazing and soldering involve using a filler metal with a lower melting point to join the coils. Mechanical fastening methods include using bolts, screws, or clips to connect the coils together. Each method has its own advantages and is chosen based on the specific requirements and constraints of the application.

Q: How are steel coils used in the production of automotive chassis?: Steel coils are used in the production of automotive chassis by being processed into flat sheets, which are then cut, shaped, and welded to form the structural framework of a vehicle. The high strength and durability of steel make it an ideal material for chassis construction, providing stability and protection to the vehicle's occupants.

Q: What is the process of recoiling steel coils?: The process of recoiling steel coils involves uncoiling the steel coil, straightening any bends or kinks, and then rewinding it into a tighter coil, ready for further processing or transportation.

Q: Hi, I need to know why stainless steel is rust proof please tell me its for my science project. :): Stainless steel is an alloy of iron and other metals, notably Chromium and vanadium. You do not see it with the naked eye but at the surface of any stainless steel (SS) there are iron atoms and chromium atoms that are exposed. However, the chromium reacts preferentially to form an oxide. In essence, think of chromium sacrificing itself for iron so that iron will not rust. What a nice guy huh! This is called passivation just like most responders said. However, more than that the chromium oxide forms a tight protective layer that forms a physical barrier preventing Oxygen or any oxidant to reach and attack the iron underneath it. Also, the chromium oxide formed is not FLAKY and porous, so it does not mar much of the surface as an iron oxide (rust) would. For science project, you may not make it too technical but you can make a reference or make an ANALOGY of rust prevention to high school or social situations as being there for your friend or classmate But in real life, when the odds are too great, that protection afforded by chromium may not be enough. Because eventually all steel exposed to very oxidizing atmospheres will rust. Just a little break in the surface is enough to start the process of rusting.

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