excellent hot-dip galvanized/ aluzinc steel in good quality

excellent hot-dip galvanized/ aluzinc steel in good quality System 1

excellent hot-dip galvanized/ aluzinc steel in good quality System 2

excellent hot-dip galvanized/ aluzinc steel in good quality

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 20 m.t.

Supply Capability:: 5000000 m.t./month

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Description:

1.Mateials:SGCC,DX51D / DX52D /S250,280GD

2.Size:width:600-1250mm(900mm,1215mm,1250mm,1000mm the most common)

thickness:0.15-2.0mm

length:1000-6000mm,as your require

3.Zinc coating :60-180g( as required)

4.Coil id:508mm

5.Coil weight: 3-5MT(as required)

6. Surface:regular/mini/zero spangle, chromated, skin pass, dry etc.

Applications of our Galvalume Coil:

Galvalume Coil widely used for roofing products, It is also the ideal base material for Prepainted Steel Coil.

1. roofing

2. gutters

3. unexposed automotive parts

4. appliances

5. furniture

6. outdoor cabinetry

We can ensure that stable quality standards are maintained, strictly meeting both market requirements and customers’ expectations. Our products enjoy an excellent reputation and have been exported to Europe, South-America, the Middle-East, Southeast-Asia, Africa and Russia etc. We sincerely hope to establish good and long-term business relationship with your esteemed company.

Q: What is the difference between regular steel stainless steel? Why does steel rust but stainless wont? Is stainless some kind of alloy or something? Any knowledgeable input would be great. Thanx!: the reagent of choice is toluene-3,4-dithiol.

Q: What is the average shelf life of a painted steel coil?: The average shelf life of a painted steel coil can vary depending on several factors such as the type of paint used, the storage conditions, and the level of exposure to environmental elements. However, on average, a painted steel coil can have a shelf life ranging from 5 to 20 years.

Q: How are steel coils used in the production of bridges and infrastructure?: Steel coils are indispensable in the manufacturing of bridges and infrastructure. Made from sturdy and long-lasting steel, these coils can endure heavy loads and harsh environmental conditions. When constructing bridges, steel coils are utilized to produce structural elements like beams, girders, and columns. These components offer the necessary strength and support to the bridge, enabling it to bear the weight of vehicles, pedestrians, and other loads. The steel coils are shaped through rolling, cut to the required length, and then welded or bolted together to form these structural elements. Moreover, steel coils are also employed in the creation of bridge decks, which serve as the roadways or walkways on the bridge. These coils are processed into steel plates, which are then assembled and secured onto the bridge structure. The steel plates provide a smooth and durable surface for vehicles and pedestrians to traverse. Regarding infrastructure, steel coils play a crucial role in the construction of various structures such as buildings, stadiums, and industrial facilities. They are utilized to fabricate primary support systems, including columns, beams, and trusses, which furnish the necessary strength and stability to these structures. Steel coils are also used to manufacture roofing and cladding systems, ensuring protection against weather elements and enhancing the overall aesthetics of the infrastructure. Furthermore, steel coils frequently contribute to the production of reinforcing bars, commonly known as rebar. Rebar is essential for strengthening concrete structures like foundations, walls, and slabs. These coils are processed into different sizes and shapes, and subsequently embedded within the concrete to enhance its tensile strength and prevent cracking or collapsing under heavy loads. In conclusion, steel coils are a vital component in the manufacturing of bridges and infrastructure. Their strength, durability, and versatility make them an ideal material for constructing secure and dependable structures that can withstand the test of time.

Q: Hi All,I was wanting to know,on the quality bikes such as Trek,Giant etc is the aluminum frames as strong as the steel frame bikes? I have heard conflicting reports on this,so thought I would ask here for more input.Thanks!: Someone stated even the $99 walmart bikes are aluminum now. WRONG! Most Walmart bikes have steel frames unless you drop about $200.00. Personally, I prefer aluminum over steel. It's lighter, most times - just as strong and won't rust if you get a ding or scrape in the paint. See links below on Trek M/B. Trek 820 - steel frame - $329.99. Trek 3500 - aluminum frame - $359.99.

Q: How are steel coils inspected for surface defects after processing?: Steel coils are inspected for surface defects after processing through a visual inspection process. Specially trained inspectors carefully examine the coils for any visible defects such as scratches, dents, or irregularities in the surface. They use advanced lighting techniques and magnification tools to ensure a thorough inspection. Additionally, automated systems may also be employed to detect and flag any defects that may have been missed during the visual inspection.

Q: How are steel coils inspected for thickness using ultrasonic testing?: Steel coils can be inspected for thickness using ultrasonic testing, which is a non-destructive testing method. In this process, a handheld ultrasonic thickness gauge is used to measure the thickness of the steel coil. The ultrasonic thickness gauge emits high-frequency sound waves that travel through the steel coil. These sound waves bounce back from the backside of the coil, creating an echo. The time taken for the echo to return to the gauge is measured and used to calculate the thickness of the coil. The gauge consists of a transducer that emits the sound waves and a receiver that detects the echoes. The transducer is placed on the surface of the coil, and a coupling gel or oil is used to ensure a good acoustic contact between the transducer and the steel surface. The transducer emits a short burst of sound waves, which penetrates through the steel coil and reaches the backside. When the sound waves encounter any changes in the thickness of the coil, such as defects or variations, they get reflected back to the transducer. The receiver detects these echoes, and the time between the emission and reception of the sound waves is measured. Using the known speed of sound in steel, the time taken for the sound waves to travel through the coil and back can be converted into a thickness measurement. This provides an accurate assessment of the thickness of the steel coil at various points. Ultrasonic testing is a reliable and efficient method for inspecting the thickness of steel coils. It allows for quick measurements without damaging the material, making it suitable for quality control and ensuring compliance with manufacturing specifications.

Q: Why do we galvanise steel? Galvanised steel is steel coated with zinc.: We galvanize steel to protect and prevent steel from rusting or corrosion. Rusting, for the most part is a layman's term that has been used exclusively to describe the chemical OXIDATION reaction of steel or iron with oxygen forming a reddish brown substance called rust. Zinc metal coating also oxidizes but does not form the reddish brown rust. Instead, it forms an oxide, just like the rust, which is iron oxide. The protection created by zinc is because it is more reactive to oxidizers, than steel or iron. Thus, the oxidizer will react with Zinc first before it will react with Iron, hence protecting iron. If the zinc is fully reacted then iron is next. BUT, the zinc oxide formed on the surface of the steel or iron is no longer reactive to oxygen and also creates a good physical barrier so that oxygen will not have chance to even have contact with the underlying steel. Isn't that neat! Here is chemistry at one of its useful best.

Q: What are the common processing defects in steel coils?: Some common processing defects in steel coils include: 1. Coil breaks: These occur when the steel strip breaks during the coil winding process. They can be caused by various factors such as improper tension control or material defects. 2. Slivers: Slivers are thin, elongated pieces of steel that are trapped in the coil during the rolling process. They can be caused by foreign materials, scale, or defects in the rolling mill. 3. Edge cracks: These are cracks that occur along the edges of the coil. They can be caused by improper edge trimming, material defects, or excessive rolling forces. 4. Surface defects: Surface defects can include scratches, pits, or scars on the steel coil. They can be caused by handling issues, improper cleaning, or defects in the rolling mill. 5. Coil set: Coil set refers to the tendency of a coil to retain a curvature after it has been uncoiled. It can be caused by uneven cooling during the rolling process or improper tension control. 6. Oil spots: Oil spots are stains or discolorations on the surface of the steel coil caused by residual oil or lubricants. They can be caused by inadequate cleaning or improper application of lubricants. 7. Wavy edges: Wavy edges refer to irregularities or waves along the edges of the steel coil. They can be caused by uneven rolling forces or improper edge trimming. 8. Lamination: Lamination defects occur when there are layers or sheets of steel that are not properly bonded together. They can be caused by material defects or improper rolling conditions. 9. Burr: A burr is a raised edge or roughness along the edge of the steel coil. It can be caused by improper trimming or cutting processes. 10. Non-uniform thickness: Non-uniform thickness refers to variations in the thickness of the steel coil. It can be caused by uneven rolling forces, improper cooling, or material defects. It is important for steel manufacturers to identify and address these processing defects to ensure the quality and reliability of the steel coils they produce.

Q: iam talking abt carbon steel of composition:-C=0.15wt% Mn=0.60wt% P=0.035wt% S=0.04wt% Cu=0.20 (min)wt%....: The composition you mention is not a low carbon steel.The carbon and manganese content are high enough to mean that the crystal grain size will be small. A very large grain size is needed in steels for transformers,motors etc.The large grain size and lack of carbides in low silicon steels for magnetic purposes allows the easy movement of magnetic domain walls.Transformer steels typically have a carbon content of about 0.003% and 3.5%Si with the phosphorus and sulphur at a tenth of the levels you mention.The high Si content increases the electrical resistivity of the magnetic core and reduces the power loss from eddy currents(the core metal has voltages generated in it by the changing magnetic fields) and the power lost in eddy currents heats up a transformers core so it needs extra cooling;the loss is inversely proportional to the resistivity and 3.5%Si increases resistivity of iron by a very large amount.The presence of high silicon with ultra low carbon and manganese level allows the soft magnetic steels to be annealed at very high temperatures(850 to 1100deg C)without a phase change so that the crystals have 10,000 to 10,000,000 times the volume of the crystals in heat-treatable (Just)steel you mention.Fine for playing with and demonstrating electromagnetism but not as electrical engineering feedstuff.

Q: Is a steel plate the same as a steel coil?: Generally speaking, they can be used interchangeably, and the purchase price of the plate is slightly cheaper.

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