GALVANISED STEEL COILS

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Product Description:

Grade: SGH340, DX51D and SGCC (customized)
Surface treatment: passivation, oiling, chromed, unoiled
Spangle types: minimal, zero and large
Thickness: 0.37 to 3.5mm
Width: greater than 1,000mm
Inner diameter: 508 to 610mm
Zinc coating: greater than 80g/m²
Applications:
- Construction, home appliance, hardware and machinery
Standards:
- JIS g3302 1998, ASTM a653 2003, EN10142 1990
- EN10327 2004, AS1397 2001, GB2518-2004
Packing: export packing/sea worthy for international delivery

Q:How are steel coils processed and treated?: Steel coils are processed and treated through a series of steps to ensure their quality and suitability for various applications. The process begins with uncoiling the steel coil, which involves removing the outer layers of protective wrapping and unwinding the coil. Once uncoiled, the steel is inspected for any defects, such as cracks or uneven surfaces. Next, the steel coil goes through a cleaning process to remove any dirt, oil, or rust present on its surface. This is typically done using a combination of chemical cleaning agents and mechanical scrubbing. After cleaning, the coil is rinsed and dried to prevent any residual moisture from causing corrosion. Once cleaned, the steel coil can undergo various treatments depending on its intended use. One common treatment is pickling, which involves immersing the coil in an acidic solution to remove impurities and scale. This process helps to improve the surface finish and prepares the steel for further processing. After pickling, the coil may be subjected to cold rolling, a process that reduces its thickness and improves its dimensional accuracy. Cold rolling involves passing the steel through a series of rollers at room temperature, gradually reducing its thickness and increasing its strength. This process also improves the surface finish of the steel coil. In some cases, the steel coil may undergo additional heat treatment processes, such as annealing or tempering. Annealing involves heating the coil to a specific temperature and then slowly cooling it, which helps to relieve internal stresses and improve its mechanical properties. Tempering, on the other hand, involves reheating the coil to a lower temperature and then cooling it rapidly. This process enhances the strength and toughness of the steel. Once the desired processing and treatments are complete, the steel coil may be coated or painted to provide additional protection against corrosion or to enhance its aesthetic appearance. Coating processes can include hot-dip galvanizing, electroplating, or applying organic coatings such as paint or powder coatings. Finally, the processed and treated steel coils are typically cut into specific sizes or shapes based on customer requirements. This can be done using various cutting methods such as shearing, slitting, or sawing. Overall, the processing and treatment of steel coils involve a combination of cleaning, pickling, rolling, heat treatment, coating, and cutting processes. These steps are carefully carried out to ensure the quality, strength, and suitability of the steel for its intended applications.

Q:What are the dimensions of steel coils used in automotive component manufacturing?: The dimensions of steel coils used in automotive component manufacturing vary depending on the specific application and requirements. However, common dimensions include thicknesses ranging from 0.5mm to 3mm and widths ranging from 600mm to 2000mm.

Q:What is the average size of a steel coil?: The average size of a steel coil can vary depending on the specific industry and application, but it is typically around 25,000 to 50,000 pounds in weight and has a diameter ranging from 30 to 72 inches.

Q:What we have to keep in mind before buying a steel building?: Before okorder /... Hope this will prove helpful to you.

Q:can steel boil and turn into a gaseous state?? if so how hot does it have to be for it to boil: I can't, but it can be done with the right machinery. For iron, it melts at 1538?C (2800?F) and boils at 2862?C (5182?F) Steel is an alloy of iron and various other materials, depending on which alloy it is. The boiling point will depend on the exact alloy and it's composition. Approximate boiling point for common steel is 3000°C (5400°F) .

Q:How are steel coils inspected for surface defects?: Steel coils are inspected for surface defects using various methods such as visual inspection, magnetic particle inspection, eddy current testing, and ultrasonic testing. These techniques allow for a thorough examination of the coil's surface, identifying any cracks, scratches, dents, or other imperfections that may affect the quality of the steel.

Q:How are steel coils used in the manufacturing of automotive body panels?: Steel coils are used in the manufacturing of automotive body panels by being formed and shaped into the desired panel shape through processes such as stamping, pressing, and roll forming. These coils provide the necessary strength and durability required for automotive body panels, ensuring the structural integrity and safety of the vehicle.

Q:What are the different methods of slitting edge trimming for steel coils?: Steel coils can be slit using various methods, each with its own benefits and applications. 1. Rotary Shear Slitting: This approach utilizes rotary knives mounted on a rotating shaft to cut through the steel coil. The knives create a shearing action as they pass through the coil. Rotary shear slitting is versatile, accommodating various coil thicknesses and materials. It is commonly employed for high-volume production, offering clean and precise cuts. 2. Crush Cut Slitting: This method involves pressing the steel coil against a hardened anvil with a rotating knife. The coil is cut by crushing it against the anvil. Crush cut slitting is suitable for thinner gauge materials and those sensitive to shearing forces. It provides clean cuts but may have limitations in terms of coil thickness and width. 3. Razor Slitting: Razor slitting employs a razor blade mounted on a rotating shaft to slice through the steel coil. This method is commonly used for thin and delicate materials that require precise and burr-free edges. While it provides clean cuts, it may be limited in terms of coil thickness and width. 4. Shear Slitting: This approach utilizes a pair of opposing blades to shear through the steel coil. The blades move past each other, creating a scissor-like cutting action. Shear slitting is commonly used for heavier gauge materials, offering clean and precise cuts. It is suitable for high-speed production and can handle a wide range of coil thicknesses and materials. 5. Laser Slitting: Laser slitting employs a high-powered laser beam guided by computer-controlled optics to cut through the steel coil. It offers precise and clean cuts and is suitable for various coil thicknesses and materials, including high-strength steels. Laser slitting provides a high level of accuracy and can handle complex cutting patterns. Each method has its own advantages and considerations, depending on the specific requirements of the steel coil slitting operation. Factors such as coil thickness, material type, desired edge quality, and production volume will influence the choice of slitting method.

Q:What are the best types of steel for swords: Don't know too much but I know combat grade katanas are made out of folded carbon-steel. Could also look into industrial steel grading systems if you are looking for something to show off at a martial arts tournament or something.

Q:What are the different types of surface defects in steel coils?: Some of the different types of surface defects in steel coils include scratches, pits, rust, scale, stains, and indentations.

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