Cold Rolled Steel coil --in Good Quality China Best

Cold Rolled Steel coil --in Good Quality China Best System 1

Cold Rolled Steel coil --in Good Quality China Best System 2

Cold Rolled Steel coil --in Good Quality China Best System 3

Cold Rolled Steel coil --in Good Quality China Best

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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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1.Structure of Cold Rolled Steel Description：

The raw material of cold rolled steel coil/sheet is high quality hot rolled product, and after pickling continuous rolling, degreasing, annealing,skin pass,slitting and cut to length line etc. Along with it many kinds of new technology and new process of global cold rolling production have been applied. Therefore the quality of the goods could be guaranteed. 2.Main Features of the Cold Rolled Steel：

• Excellent process capability

• Smooth and flat surface

• Workability, durability

• High strength

• Good visual effect

3. Cold Rolled Steel Images

Cold Rolled Steel coil --in Good Quality China Best

4.Cold Rolled Steel Specification

Standard:AISI,ASTM,DIN,GB,JIS,JIS G3302 ASTM 653M EN10142

Grade: Q195~Q345

Thickness: 0.16mm~2.0mm

Width: 1250mm MAX

Coil weight:3-12 MT

Chemical composition:

0.150

0.476

11.231

12.50

0.900

0.039

0.010

5. FAQ of Cold Rolled Steel

1.How to guarantee the quality of the products？

We have established the international advanced quality management system，We resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.

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 15-25 days, but the shipment will depend on the vessel situation.

Q: How do steel coils contribute to fire resistance in buildings?: Steel coils contribute to fire resistance in buildings primarily due to their material properties. Steel is a non-combustible material, meaning it does not burn or contribute to the spread of fire. It has a high melting point, which helps it retain its structural integrity even under high temperatures. Additionally, steel coils are often used as structural elements in building construction, providing strength and stability to the overall structure. This helps prevent the collapse of the building in case of a fire, providing occupants with more time to evacuate safely.

Q: What are the advantages of using hot-rolled steel coils?: Hot-rolled steel coils offer several advantages. Firstly, they have a higher strength-to-weight ratio, making them suitable for applications that require strong and durable materials. Secondly, hot-rolled steel coils have better formability, allowing for easier shaping and manipulation during fabrication. Additionally, these coils have a smoother surface finish, making them more aesthetically appealing and suitable for applications that require a polished appearance. Lastly, hot-rolled steel coils are generally more cost-effective compared to other steel manufacturing processes, making them a preferred choice for various industries.

Q: How are steel coils used in construction?: Steel coils are commonly used in construction for a variety of purposes, such as creating structural frameworks, reinforcing concrete, and manufacturing various building components like beams, columns, and trusses. The coils are unrolled and cut to specific dimensions, allowing them to be easily shaped and welded into various structural elements. This versatile material provides strength, durability, and flexibility, making it an essential component in constructing buildings, bridges, and other infrastructure projects.

Q: How are steel coils used in the production of steel locks?: Steel coils are used in the production of steel locks as they are rolled into sheets and then cut into appropriate sizes to form the body and components of the locks. The coils provide a consistent and high-quality raw material that can be easily shaped and transformed into the desired lock designs, ensuring durability and strength in the final product.

Q: What are the different methods of cut-to-length shearing for steel coils?: There are several different methods of cut-to-length shearing for steel coils, including rotary shearing, flying shear, stationary shear, and programmable logic controller (PLC) controlled shear. Each method has its own advantages and is used based on factors such as coil thickness, desired precision, and production speed requirements.

Q: How are steel coils used in the production of steel brackets?: Steel coils are used in the production of steel brackets by being fed through a machine that cuts, bends, and shapes the steel into the desired bracket design. The coils provide a continuous supply of raw material, allowing for efficient and high-volume manufacturing of steel brackets.

Q: How are steel coils used in the production of electrical switches?: Steel coils are used in the production of electrical switches as they act as the core of the electromagnetic system. When an electric current passes through the coil, it creates a magnetic field which attracts or repels a movable metal component, allowing the switch to open or close. This mechanism is crucial for controlling the flow of electricity in various electrical devices and systems.

Q: What are the different steel coil packaging methods?: There are several different steel coil packaging methods, including using steel strapping, wrapping with plastic or stretch film, placing the coils in wooden crates, or using steel coil sleeves or eye-to-sky packaging.

Q: How are steel coils inspected for surface defects using non-destructive testing methods?: Steel coils are inspected for surface defects using non-destructive testing (NDT) methods to ensure their quality and integrity. There are several common NDT methods employed in this process. One of the most widely used methods is visual inspection, where trained inspectors visually examine the surface of the steel coils for any visible defects such as scratches, cracks, pits, or corrosion. This method is relatively simple and cost-effective but is limited to detecting only surface-level defects. Another commonly used NDT method is magnetic particle testing (MT). This method utilizes the principles of magnetism to identify surface and near-surface defects in ferromagnetic materials like steel. A magnetic field is applied to the steel coil, and iron particles are applied to the surface. If there is a defect, such as a crack or discontinuity, the iron particles will concentrate around it, making the defect visible to the inspector. Liquid penetrant testing (PT) is another NDT method used to inspect steel coils for surface defects. In this method, a liquid penetrant is applied to the surface of the coil. The penetrant is drawn into any surface defects by capillary action. After a certain period, excess penetrant is removed, and a developer is applied. The developer draws out the penetrant from any defects, making them visible to the inspector. Ultrasonic testing (UT) is a widely used NDT method that can detect both surface and subsurface defects in steel coils. High-frequency sound waves are transmitted into the steel coil, and the reflected waves are analyzed to identify any abnormalities. This method can detect defects such as cracks, inclusions, and voids that may not be visible to the naked eye. Additionally, eddy current testing (ECT) is another NDT method used for inspecting steel coils. This method utilizes electromagnetic induction to detect surface and near-surface defects. A coil carrying an alternating current is placed near the surface of the coil being inspected. Any changes in the coil's electrical conductivity caused by surface defects are detected and analyzed, allowing the inspector to identify and evaluate the severity of the defects. In conclusion, steel coils are inspected for surface defects using various non-destructive testing methods such as visual inspection, magnetic particle testing, liquid penetrant testing, ultrasonic testing, and eddy current testing. These methods ensure the quality and integrity of the steel coils before they are used in various applications.

Q: What are the different coil winding methods used for steel coils?: There are several different coil winding methods used for steel coils, each with its own advantages and applications. 1. Layer winding: This is the most common method used for steel coils. It involves winding the steel strip or sheet in concentric layers, one on top of the other, to form a coil. This method is ideal for thin, narrow strips and provides good stability and strength to the coil. 2. Cross winding: In this method, the steel strip is wound in a crisscross pattern, alternating the direction of each layer. This helps to distribute the stress evenly across the coil and prevents the coil from becoming unstable. Cross winding is commonly used for thicker or wider steel strips. 3. Spiral winding: This method involves winding the steel strip in a spiral pattern, forming a coil with a gradual increase in diameter. Spiral winding is often used for large or heavy steel coils, as it allows for easy handling and transportation. It also provides good stability and prevents the coil from collapsing. 4. Toroidal winding: This method is used for producing toroidal or donut-shaped coils. The steel strip is wound in a circular path, with each layer placed inside the previous one. Toroidal winding is commonly used in applications such as transformers, where the coil needs to have a specific shape and size. 5. Interleaved winding: This method involves interleaving two or more steel strips together during the winding process. Interleaved winding is used to produce composite coils with different materials or thicknesses. It provides enhanced strength, stability, and allows for customized designs. Each of these coil winding methods has its own advantages and is used based on the specific requirements of the steel coil application. The choice of method depends on factors such as strip thickness, width, tensile strength, and desired coil properties.

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