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?: Various industries utilize several different steel coil cutting processes. These processes include: 1. Shearing: The most widely used and simplest method of steel coil cutting involves utilizing a shear blade to cut the coil material into desired lengths. This can be done either manually or with the assistance of automated machinery. 2. Slitting: A process designed to cut wide coils into narrower strips, slitting involves passing the coil material through a set of circular knives that cut the steel into smaller coils or strips of the desired width. 3. Laser cutting: Renowned for its precision and efficiency, laser cutting involves using a high-powered laser to melt or vaporize the material along a predetermined path. This method is commonly employed for intricate designs or when high accuracy is required. 4. Plasma cutting: Another method of cutting steel coil involves using a plasma torch that generates a high-velocity jet of ionized gas to melt the material. Plasma cutting is known for its speed and ability to cut through thick materials. 5. Waterjet cutting: This process utilizes a high-pressure stream of water mixed with abrasive particles to cut through steel coil. Waterjet cutting is frequently chosen when the material being cut is sensitive to heat or when precision is necessary. 6. Saw cutting: A traditional cutting method, saw cutting involves using a saw blade with teeth to cut through the material. It is particularly effective for thicker materials and can be performed manually or with the aid of automated machinery. These represent just a few of the many steel coil cutting processes commonly employed. The choice of cutting method relies on several factors such as the material's type and thickness, desired accuracy, speed, and cost-effectiveness.

Q: I am doing an assignment for my materials class, im not asking for the answer but just some help. I have the assignment finished and handed in but the teacher gave it back with one comment, he asked me to explain the grain growth in steel during hydraulic press bending. Im completely stuck, please help. Thanks.: Well, I can't answer the question for you because, if the press bending is done cold, the grains will not grow (at least not with normal steel alloys). One wonderful thing about metallurgy is that the real answer is it depends because there are all sorts of weird and unexpected things that can happen. Cold work (which is what press bending is unless it is done hot or the amount of deformation is extraordinary high and fast so the metal heats up a lot locally) adds stored energy (strain energy) which provides one of the driving forces for recrystallization. Recrystallization is not a yes/no process, it is a process that happens as a function of time and temperature. Recrysallization of a cold worked structure will refine the grain size if done properly but the final stage of recrystallization is grain growth and you can end up with a larger grain size than you started with. The other thing that can affect grain structure is the deformation itself. There are all sorts of transformations that can happen due to the deformation process (twinning/martensitic is one) but, again, these don't usually qualify as grain growth. It may be that the question was incomplete, maybe the question is how does the press bending affect the final grain size after a subsequent anneal? The metallurgy of steels is fascinating because there are so many different microstructures that can be produced, hundreds (or thousand) different alloys, equilibrium and non-equilibrium phases based on composition and thermo-mechanical processing. Hope this helps

Q: What are the typical coil thickness options?: The typical coil thickness options vary depending on the specific application and industry. However, common coil thickness options range from 0.005 inches to 0.250 inches (0.127mm to 6.35mm), with various intermediate thicknesses available.

Q: How are steel coils coated for corrosion resistance?: Steel coils are typically coated for corrosion resistance using various methods such as hot-dip galvanizing, electroplating, or applying a protective layer of paint or powder coating.

Q: How are steel coils used in the petrochemical industry?: Steel coils are commonly used in the petrochemical industry for various applications such as manufacturing pipes, tanks, and pressure vessels. They serve as raw materials for fabricating these essential components used in the transportation, storage, and processing of petrochemical products. The strength and durability of steel make it an ideal material for withstanding harsh environments and high-pressure conditions, ensuring the safety and efficiency of petrochemical operations.

Q: What is the standard thickness of steel coils?: The specific application and industry requirements dictate the standard thickness of steel coils, which can vary. Generally, steel coils are obtainable in thicknesses ranging from 0.5mm to 10mm. Various factors, including intended use, structural requirements, and manufacturing processes, influence the desired thickness of a steel coil. Heavier applications that necessitate increased strength and durability typically employ thicker coils. Conversely, thinner coils are suitable for lighter applications where flexibility and weight reduction are crucial. To determine the appropriate thickness for steel coils in a particular application, it is essential to consult industry standards and specific project requirements.

Q: What are the different coil packaging options available for steel coils?: Customers have a range of coil packaging options to choose from for steel coils, depending on their specific requirements and preferences. Some commonly used packaging options include the following: 1. Traditional steel strapping is used to secure the coil, ensuring excellent stability and protection during transportation and storage. 2. Plastic strapping is a lighter and more cost-effective alternative to steel strapping, suitable for smaller and lighter steel coils while still providing sufficient strength and protection. 3. Shrink wrapping involves using heat to tightly seal a plastic film around the steel coil, offering protection against moisture, dust, and other contaminants. 4. Wooden crates provide additional protection against physical damage during handling and transportation. They can be customized to fit the coil's dimensions and secured with straps or nails. 5. Coil covers are heavy-duty plastic or fabric covers that shield the steel coil from environmental factors like UV exposure, moisture, and dust. They are often used in combination with other packaging methods. 6. Paper or fiberboard wrapping offers a lightweight and cost-effective solution for protecting the coil against minor scratches and abrasions. 7. Customized packaging allows for a combination of the above options or tailor-made solutions based on specific requirements. This may involve additional padding, corner protectors, or special handling instructions to ensure safe transportation and storage. Customers should consider factors such as coil size, weight, transportation mode, storage conditions, and budget to choose the most suitable coil packaging option for their needs.

Q: How are steel coils used in the production of furniture components?: Due to their strength, durability, and versatility, steel coils are frequently utilized in the manufacturing of furniture components. These coils, crafted from high-quality steel, undergo a process of uncoiling before being fed into a machine known as a stamping press. Within the stamping press, a die is employed to shape and cut the steel coil into various components necessary for furniture production, such as chair frames, table legs, or brackets. The utilization of steel coils facilitates the mass production of furniture components with uniform dimensions and exceptional accuracy. The robustness of steel guarantees that these components can withstand heavy loads, providing stability to the furniture. Additionally, steel coils possess the ability to be effortlessly molded into diverse shapes and sizes, enabling the creation of a vast array of furniture designs. Furthermore, steel coils are frequently subjected to protective treatments or coatings, such as paints or galvanization, in order to enhance their resistance to corrosion, moisture, and wear. This ensures that the furniture components possess a longer lifespan and retain their aesthetic appeal over time. In conclusion, the presence of steel coils plays a vital role in the production of furniture components, as they offer strength, durability, and versatility. They enable the mass production of precise and consistent components, while their protective coatings guarantee the durability and quality of the final furniture products.

Q: What are the different grades of steel used for manufacturing coils?: There are several grades of steel that are commonly used for manufacturing coils. These grades are chosen based on their specific properties and suitability for different applications. Some of the most common grades of steel used for manufacturing coils include: 1. Low carbon steel (mild steel): This grade of steel is often used for manufacturing coils as it is relatively inexpensive and has good formability. It is suitable for applications that require low strength and high ductility, such as automotive components and construction materials. 2. High carbon steel: This grade of steel is known for its high strength and hardness. It is commonly used for manufacturing coils that require high tensile strength, such as springs and wires. 3. Stainless steel: Stainless steel is a corrosion-resistant alloy that contains a high percentage of chromium. It is commonly used for manufacturing coils that require resistance to corrosion and oxidation, such as in the food industry, medical equipment, and automotive applications. 4. Galvanized steel: Galvanized steel is coated with a layer of zinc to protect it from corrosion. It is commonly used for manufacturing coils that will be exposed to harsh environmental conditions or for applications that require excellent durability, such as roofing materials and electrical appliances. 5. Alloy steel: Alloy steel is made by adding elements such as manganese, nickel, chromium, or molybdenum to carbon steel. This improves its strength, hardness, and resistance to wear and corrosion. Alloy steel coils are commonly used in applications that require high strength and toughness, such as in the aerospace and automotive industries. It is important to select the appropriate grade of steel based on the specific requirements of the application to ensure optimal performance and longevity of the coils.

Q: What are the different methods of roll forming steel coils?: There are several different methods of roll forming steel coils, each with its own unique characteristics and applications. Some of the most common methods include: 1. Traditional Roll Forming: This is the most widely used method and involves passing a continuous strip of steel through a series of rollers to gradually shape it into the desired profile. This method provides high precision and repeatability, making it suitable for producing complex shapes and profiles. 2. Pre-Punch and Cut: In this method, the steel strip is pre-punched with holes or slots before it is roll formed. This allows for easier cutting and shaping of the material during the forming process. Pre-punching and cutting can improve efficiency and reduce waste in certain applications. 3. Post-Punch and Cut: This method is similar to pre-punching and cutting, but the holes or slots are added after the roll forming process. This allows for more flexibility in creating custom shapes and designs, as the holes can be placed precisely where needed. 4. Post-Forming: In some cases, the steel strip may be first roll formed into a basic shape or profile and then further manipulated or formed after the initial roll forming process. This method allows for additional customization and can be used to create more complex geometries. 5. Progressive Roll Forming: This method involves passing the steel strip through a series of rollers in a continuous process, with each roller gradually adding a specific feature or forming a particular part of the final profile. Progressive roll forming is commonly used for long, continuous profiles with repetitive shapes. 6. Incremental Roll Forming: In this method, the steel strip is incrementally formed by a series of small movements of the rollers. This allows for greater flexibility in shaping complex profiles and can be particularly useful for producing prototypes or low-volume production runs. Overall, the choice of roll forming method depends on the specific requirements of the application, such as the desired shape, complexity, precision, and production volume. Each method offers its own advantages and limitations, and manufacturers often select the most appropriate method based on these factors.

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