Cold rolled stainless steel coil refers to a stainless steel coil that has undergone a cold rolling process. Cold rolling is a metalworking process in which the stainless steel coil is passed through a series of rollers at room temperature to reduce its thickness and improve its surface finish.
Description
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Metal In China® is a trusted stainless steel supplier in China. Stainless steel products cover plates, coils and pipes. We have a large inventory of 200 series, 300 series and 400 series stainless steel products. The most popular stainless steel grades in the market are 201, 304, 310, 316, 410, 420, 430, 2205 and 904L etc. We support customization of various surface treatments, including brushed, 2b, ba, polished and mirror (8k, rose gold), etc. We are very happy to provide each customer with a customized and reasonable quotation, including free sample delivery, contact us now.
Information
Features
Cold rolled stainless steel coil refers to stainless steel coils that have undergone a cold rolling process after the hot rolling process. Here are some key features and benefits of cold rolled stainless steel coil:
- Superior Surface Finish: Cold rolling improves the surface finish of stainless steel coil, resulting in a smoother and more consistent appearance. The process reduces surface imperfections, such as scale, oxidation, and roughness, creating a clean and attractive finish.
- Tight Dimensional Tolerances: Cold rolling allows for precise control over thickness, width, and flatness of stainless steel coil. The resulting coils have tight dimensional tolerances, making them suitable for applications that require exact specifications and consistency.
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- Uniform Mechanical Properties: Cold rolling refines the microstructure of stainless steel, leading to improved mechanical properties. Cold rolled stainless steel coil exhibits higher strength, hardness, and dimensional stability compared to hot rolled coils.
- Improved Formability: Cold rolled stainless steel coil offers excellent formability, allowing it to be easily shaped and formed into different components and structures. It can undergo various fabrication processes, such as bending, deep drawing, and stamping, while maintaining its mechanical integrity.
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- Increased Surface Protection: The cold rolling process removes surface contaminants and scales, enhancing the corrosion resistance of stainless steel coil. Cold rolled coils can be further treated with protective coatings or surface finishes to improve their resistance to corrosion, oxidation, and staining.
- Consistent and Homogeneous Material: Cold rolling ensures consistent mechanical and chemical properties throughout the stainless steel coil. It results in a homogeneous material with uniform grain structure, providing enhanced strength and reliability.
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- Versatility: Cold rolled stainless steel coil finds application in a wide range of industries, including automotive, construction, appliances, and manufacturing. It is commonly used in structural components, kitchen appliances, automotive trim, and precision engineering applications.
- Excellent Surface for Coating and Finishing: Cold rolled stainless steel coil provides a clean and smooth surface, making it suitable for various coating and finishing processes. It readily accepts surface treatments such as electroplating, painting, and powder coating, offering enhanced aesthetics and corrosion protection.
- Recyclability: Like other stainless steel grades, cold rolled stainless steel coil is recyclable. It can be recycled and reused, contributing to sustainable practices and reducing environmental impact.
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Specification
Standard | ASTM,AISI,SUS,JIS,EN,DIN,BS,GB |
Finish | NO.1(Hot Rolled), NO.2B(Cold Rolled), Hairline, Brushed, BA, NO.3, NO.4, NO.240, NO.400, NO.8 etc. |
Grade | 201/202/304/309/309S/310/310S/304/304L/316/316L/316Ti/410/420/430/904L |
Thickness | 3mm-15mm (Hot Rolled) ;0.3mm-8mm (Cold Rolled) can be customized ; |
Width | 1000mm/1250mm/1500mm, can be customized |
Services | Welding/Punching/Cutting/Bending/Decoiling |
Package | Standard seaworthy package(protected by waterproof paper,wrapped in iron sheet, fixed by steel bars) |
Technology
Cold rolled stainless steel coil is produced through a specific manufacturing process that involves further reducing the thickness of the stainless steel material through cold rolling. Here is a general overview of the manufacturing technology for cold rolled stainless steel coil:
- Melting: The raw materials, including iron, chromium, nickel, and other alloying elements specific to the desired stainless steel grade, are melted together in an electric arc furnace or an induction furnace.
- Refining: The molten steel is refined to remove impurities and control the composition. Various refining processes, such as Argon Oxygen Decarburization (AOD) or Vacuum Oxygen Decarburization (VOD), can be employed.
- Casting: The refined molten steel is cast into large semi-finished shapes, such as slabs or billets, through continuous casting or ingot casting. The shapes are then cooled.
- Hot Rolling: The cast shapes are reheated to a high temperature and then hot rolled to reduce their thickness and to break down the cast structure, making the steel more ductile and formable. This process creates a hot-rolled coil.
- Cold Rolling: The hot-rolled coil is further reduced in thickness through cold rolling. The hot-rolled coil is passed through a series of rolling mills, where it is progressively reduced in thickness to the desired final thickness. Cold rolling not only reduces the thickness but also improves the surface finish and increases the strength and dimensional accuracy of the stainless steel.
- Annealing: After cold rolling, the stainless steel coil undergoes an annealing process to relieve internal stresses and improve ductility. This process involves heating the coil to a specific temperature and then slowly cooling it down. It helps to refine the grain structure and create a more uniform material.
- Skin Passing: The annealed coil may undergo a skin-pass rolling process to improve the surface finish and flatness. This involves applying light tension and rolling the material through a set of rolls to reduce the roughness and enhance the smoothness of the surface.
- Finishing Operations: After skin passing, the cold rolled stainless steel coil may undergo additional finishing operations, such as pickling and passivation, to remove scale and stains and to enhance corrosion resistance.
- Cutting and Packaging: The cold rolled stainless steel coil is cut into the desired lengths or sizes according to customer requirements. It is then properly packaged and prepared for shipment.
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Application
Cold rolled stainless steel coil is made by rolling stainless steel at low temperatures, which leads to a more refined surface compared to hot rolled stainless steel, better dimensional accuracy, and enhanced strength. The process also increases the steel’s hardness and reduces its ductility.
Here are some common applications for cold rolled stainless steel coil:
- Automotive Industry: Cold rolled stainless steel is commonly used in the automotive industry for parts like car doors, hoods, and fenders due to its high strength and formability.
- Home Appliances: Cold rolled stainless steel is used in a variety of household appliances such as refrigerators, washing machines, and dishwashers. The clean, polished appearance of cold-rolled stainless steel makes it ideal for visible parts.
- Electronics: Cold rolled stainless steel can be used in various electronic devices due to its clean appearance and high strength. Examples include computer chassis, TV frames, and other casings.
- Aerospace: Cold rolled stainless steel’s high strength-to-weight ratio makes it suitable for some aerospace applications.
- Construction and Architecture: It’s used in construction and architectural applications where precision is needed. These can include structural sections for buildings, or decorative elements like cladding and trim.
- Industrial Equipment: Cold rolled stainless steel can be used in various industrial applications where high strength and precision are required.
- Medical Devices: Its high strength, corrosion resistance, and clean finish make cold rolled stainless steel suitable for use in medical devices.
Package
Packaging of stainless steel coil is important to protect the material from damage during transit, handling, and storage. Here is a general overview of how stainless steel coils are packaged:
- Wrapping: The coil is typically first wrapped with a protective material like plastic film or waterproof paper to protect the surface from scratches or other potential damage. This also helps to prevent exposure to moisture which can cause rusting.
Stainless Steel Coil Package 1
- Edge Protection: The edges of the coil are often protected with additional material, such as cardboard or hard plastic edge protectors, to prevent damage to the edges of the coil. This is important because the edges can be particularly susceptible to damage during handling.
- Metal Strapping: Metal straps are usually used to secure the coil and the protective packaging. This helps to ensure the coil stays intact during transportation.
Stainless Steel Coil Package 2
- Wooden Pallet: For additional support, the coil is often placed on a wooden pallet. This provides a solid base for the coil and makes it easier to move with a forklift.
- Outer Packaging: An outer layer of packaging, often made of metal or wood, is sometimes used for additional protection, especially for international shipping where the coils might be exposed to harsh conditions.
Stainless Steel Coil Package 3
- Labeling: Finally, the coil is labeled with important information such as the size, grade, heat number, and any other relevant details about the steel. This helps to ensure the right material gets to the right place.
Cold Rolled Stainless Steel Coil
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