Galvanized Cold Rolled Sheet Coil for building
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 36 m.t.
- Supply Capability:
- 30000 m.t./month
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Brief Introduction
1. Prepainted Galvanized Steel Coil is coated with organic layer, which provides higher anti-corrosion property and a longer lifespan than that of galvanized steel sheets.
2. The base metal for Prepainted Galvanized Steel Coil is HDGI Steel. The finish coats of Prepainted Galvanized Steel Coil can be classified into groups as follows: polyester, silicon modified polyesters, polyvinylidene fluoride, high-durability polyester, etc.
3. The production process has evolved from one-coating-and-one-baking to double-coating-and-double-baking, and even three-coating-and-three-baking.
4. The color of the Prepainted Galvanized Steel Coil has a very wide selection, like orange, cream-colored, dark sky blue, sea blue, bright red, brick red, ivory white, porcelain blue, etc.
5. The Prepainted Galvanized Steel Coil can also be classified into groups by their surface textures, namely regular prepainted sheets, embossed sheets and printed sheets.
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 | ||
Yield Strength MPa | Tensile Strength MPa | Elongation A80mm % ≥ | |
DX51D+Z | 140-350 | 270-500 | 22 |
DX52D+Z | 140-300 | 270-420 | 26 |
DX53D+Z | 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 coil coating options available for steel coils?
- There are several coil coating options available for steel coils, including polyester, polyurethane, fluoropolymer, silicone polyester, and plastisol coatings. Each of these options offers different properties such as durability, weather resistance, UV protection, and chemical resistance, allowing for customization based on the specific application and environmental conditions.
- Q: What are the different types of corrosion protection methods used for steel coils?
- There are several types of corrosion protection methods used for steel coils, including: 1. Coating: Applying a protective layer of paint or coating, such as epoxy or zinc, on the surface of the steel coil to prevent direct contact with moisture and corrosive substances. 2. Galvanization: Immersing the steel coil in a bath of molten zinc to create a protective zinc coating, which acts as a sacrificial layer that corrodes first before the steel. 3. VCI (Volatile Corrosion Inhibitors): Using volatile chemicals that release protective vapors, which form a thin layer on the steel coil's surface, inhibiting corrosion by blocking moisture and oxygen. 4. Passivation: Treating the steel coil with chemicals like nitric acid to remove impurities, creating a passive oxide layer that protects against corrosion. 5. Cathodic Protection: Connecting the steel coil to a sacrificial anode (usually made of zinc or magnesium) or using impressed current to provide a flow of electrons, which prevents corrosion by making the steel coil the cathode in an electrochemical cell. 6. Environmental Control: Maintaining controlled temperature, humidity, and atmospheric conditions during storage and transportation to minimize exposure to corrosive elements. These methods can be used individually or in combination, depending on the specific requirements and environmental conditions.
- Q: Is steel easier to weld?Which is more brittle/less flexible?
- Note: the easiest way to join steel to aluminum is to drill holes and BOLT them together...... You cannot WELD steel to aluminum.(except using extreme methods like explosion welding......) For all intents and purposes they are dissimilar metals, meaning they will not bond to each other. Also, aluminum has a much lower melting point than steel. It is possible to join steel and aluminum by *Soldering,* using tin/zinc hard solder. This requires a special flux designed exclusively for soldering aluminum though. The heating process is also a bit delicate as you must avoid overheating the joint. I work as a welder and I've only soldered Al three or four times. Steel is easiest to weld by far. If you set the equipment correctly, a six year-old kid can make a good weld on steel. Aluminum requires special equipment and procedures to weld. It's not easy. The brittleness of aluminum depends on it's alloy content. Most of the aluminum that's used today is not pure, rather it's in the form of aluminum ALLOYS which contain either zinc, magnesium, silicon, or manganese. these elements increase the strength dramatically, but also make it much less ductile. Commercially pure (CP) aluminum is very ductile, but it's also rather weak. Pure aluminum is used to make aluminum foil, as it's so soft and ductile it can easily be rolled paper-thin. The best aluminum alloys can come near in strength to mild steel, but weigh less than half as much as steel. Note that steel itself is an alloy of iron and carbon, Carbon increases the strength of iron in the same way that zinc or magnesium increase aluminum's strength. Most of the commonly used aluminum alloys are somewhat more brittle than mild steel, but not greatly so.
- Q: Im in the process of replacing the gutters/down spouts on my house. The top of the house is four sided. The bottom level has a porch area with 3 sides, two smaller roofs in the back, and one small roof on the side with all stainless steel gutters. A two story house. Not sure of the demensions. They were made at a Steel Mill where the previous owner, worked.This guy wants to buy the stainless gutters but I need to know the market value of this steel and offer him a price. Can someone tell me what I can sell it for? Does it go by the pound? Foot? Can you give me an idea please? Theres a lot of it! I have no clue what to do! Thanks!
- Depends on the company but you'd probably get a decent amount of money. Try searching different sites.
- Q: What are the main characteristics of steel coils?
- The main characteristics of steel coils include their high strength and durability, ability to withstand extreme temperatures, excellent corrosion resistance, and superior formability. Steel coils are also known for their consistent and uniform thickness, smooth surface finish, and wide range of available sizes and grades. Additionally, they are easy to transport and process, making them highly versatile for various industrial applications.
- Q: How are steel coils used in the manufacturing of industrial mixers?
- Steel coils are often used in the manufacturing of industrial mixers as they provide the necessary strength and durability required for the equipment. These coils are typically used to construct the main body and components of the mixers, ensuring they can withstand the high-intensity mixing processes and heavy loads that they encounter in industrial settings.
- Q: What are the common coil surface treatments available for steel coils?
- There are several common coil surface treatments available for steel coils, each serving different purposes and offering various benefits. These treatments aim to enhance the durability, corrosion resistance, and appearance of the steel coils. 1. Galvanized Coating: Galvanization is a popular treatment in which a layer of zinc is applied to the steel coil's surface. This coating provides excellent corrosion protection, preventing rust and extending the lifespan of the coil. It is commonly used in outdoor applications or environments with high humidity levels. 2. Phosphating: Phosphating is a chemical treatment that forms a thin layer of phosphate coating on the steel coil's surface. This treatment enhances the adhesion of subsequent coatings and improves the coil's paintability. It also offers some corrosion resistance and can be used as a pre-treatment before painting or powder coating. 3. Chromate Conversion Coating: Chromate conversion coating, also known as chem film or Alodine, involves applying a thin layer of chromate to the steel coil's surface. This treatment offers corrosion protection and acts as a primer for subsequent coatings, improving their adhesion. It is often used in aerospace and electrical applications. 4. Powder Coating: Powder coating is a dry finishing process in which a fine powder is applied to the steel coil's surface electrostatically and then cured under heat. This treatment provides a durable and attractive finish, offering excellent resistance to chipping, scratching, and fading. Powder coating is available in a wide range of colors and textures, making it a versatile option. 5. Organic Coatings: Organic coatings, such as acrylic, polyester, or polyurethane, are applied to the steel coil's surface as liquid paints. These coatings provide aesthetic appeal, protection against corrosion, and resistance to weathering and UV radiation. Organic coatings are often used in architectural and automotive applications. 6. Anodizing: Anodizing is a treatment primarily used for aluminum coils but can also be applied to steel coils. It involves creating an oxide layer on the surface of the coil through an electrochemical process. This treatment enhances the coil's corrosion resistance and provides an attractive finish. Anodizing is commonly used in architectural and decorative applications. It's important to note that the choice of coil surface treatment depends on the specific requirements of the application, including the desired performance, aesthetics, and environmental factors. Consulting with a professional in the steel industry can help determine the most suitable treatment for a particular project.
- Q: What are the benefits of using steel coils in the manufacturing of pipes?
- There are several benefits of using steel coils in the manufacturing of pipes. Firstly, steel coils offer high strength and durability, making them capable of withstanding extreme pressure and temperature conditions. This ensures the longevity and reliability of the pipes. Secondly, steel coils provide excellent corrosion resistance, which is crucial for pipes that come into contact with different substances or are used in corrosive environments. Additionally, steel coils allow for seamless production and fabrication of pipes, resulting in a smooth surface finish and uniform dimensions. Lastly, steel coils are readily available and cost-effective, making them a preferred choice for pipe manufacturing.
- Q: I know that the steel is significantly harder than when air cooled, but why is the quenched steel harder?
- Quenching results in smaller grains than air cooled. This means more boundaries, which means harder steel.
- Q: How are steel coils inspected for weldability?
- Steel coils are inspected for weldability through a series of comprehensive tests and examinations. The main objective of this inspection is to assess the quality and suitability of the steel coils for welding processes. Firstly, visual inspection is conducted to identify any visual defects or irregularities on the surface of the coils. This includes checking for surface roughness, cracks, scratches, or any other imperfections that may affect the weldability. Next, destructive testing methods such as tensile testing and impact testing are performed. Tensile testing measures the strength and ductility of the steel, ensuring it meets the required mechanical properties for welding. Impact testing evaluates the steel's resistance to brittle fracture, which is crucial in determining its weldability. Furthermore, non-destructive testing techniques such as ultrasonic testing (UT) and magnetic particle inspection (MPI) are employed to detect internal defects and discontinuities. UT uses high-frequency sound waves to identify any hidden flaws within the steel, while MPI utilizes magnetic particles to identify surface and near-surface defects. Additionally, chemical analysis is carried out to determine the steel's composition and ensure it meets the required specifications for welding. This analysis involves checking the levels of carbon, manganese, sulfur, and other elements that may affect the weldability and overall performance of the steel. Moreover, weldability testing is performed to evaluate the steel's response to welding processes. This involves conducting various welding trials using different techniques and parameters to determine the steel's behavior during welding, such as its susceptibility to cracking, distortion, or other welding-related issues. Overall, the inspection of steel coils for weldability is a multi-faceted process that combines visual, destructive, non-destructive, chemical, and weldability testing methods. By conducting these thorough inspections, manufacturers can ensure that the steel coils meet the required standards and are suitable for welding applications.
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Galvanized Cold Rolled Sheet Coil for building
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 36 m.t.
- Supply Capability:
- 30000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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