This is the Prepainted Galvanized steel Coil

This is the Prepainted Galvanized steel Coil System 1

This is the Prepainted Galvanized steel Coil

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 100000 m.t./month

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1.Structure of Prepainted Galvanized steel Coil

With Gi as base metal, after pretreatmet (degrease and chemical treatment) and liquid dope with several Layers of color, then after firing and cooling, finally the plate steel is called pre-painted galvanized steel ( PPGI) .Pre-painted galvanized steel is good capable of decoration ,molding, corrosion resistance

2.Main Features of Pre-painted Galvanized steel Coil

• Workability, durability

• Smooth and flat surface

• Excellent heat resistance performance

• Good formability

• High strength

• Excellent process capability

• Good visual effect

3.Pre-painted Galvanized steel Coil Images

This is the Prepainted Galvanized steel Coil

4. Pre-painted Galvanized steel Coil Specification

Standard: ASTM, GB,JIS,JIS G3302 ASTM 755 EN10169

Grade: DX51D CGCC CS

Chemical composition:

0.150

0.476

11.231

12.50

0.900

0.039

0.010

5.FAQ of Prepainted Galvanized steel Coil

1. 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: What are the typical tolerances for steel coils?: The typical tolerances for steel coils can vary depending on the specific requirements and standards of the industry. However, common tolerances for steel coils typically range between +/- 0.005 to 0.020 inches in terms of thickness, width, and length. These tolerances ensure that the steel coils meet the desired specifications and can be used effectively in various applications.

Q: What metals contain steel? It can be anything except soft iron or steel.: Metals do not contain steel. Steel is an alloy of purified iron and carbon, and sometimes with other metals, such as nickel, chromium, or molybdenum to make it stainless or to change its hardness or other properties. It's like asking what cereals contain Cheerios. It doesn't really make sense. Other metal alloys contain iron, which is an element and the main ingredient of steel. Maybe you should be asking which metal alloys contain iron? That's more like asking which cereals contain whole grain oats. Now that's a question that can be answered by reading the ingredients labels on your standard boxes of metal alloys :-)

Q: How are steel coils used in the manufacturing of pipelines?: Steel coils are used in the manufacturing of pipelines by being uncoiled and formed into sections that are welded together to create a continuous pipeline.

Q: How do steel coils contribute to energy efficiency in transportation?: Steel coils are essential in energy-efficient transportation due to their lightweight yet strong nature. The use of steel coils in vehicles, such as cars and trucks, reduces the overall weight of the vehicle, enhancing fuel efficiency and reducing carbon emissions. Additionally, steel coils are often used in rail transportation, where their durability and strength contribute to the energy efficiency of trains by allowing for higher speeds and improved load carrying capacity.

Q: What are the different methods of steel coil surface cleaning?: Some of the different methods of steel coil surface cleaning include pickling, shot blasting, and chemical cleaning. Pickling involves immersing the steel coil in an acid solution to remove oxides and scales. Shot blasting uses high-speed particles to remove rust, scale, and paint from the surface. Chemical cleaning involves using specialty chemicals to dissolve contaminants and restore the steel coil's surface.

Q: How are steel coils inspected for flatness?: Steel coils are inspected for flatness by using a variety of methods and techniques to ensure they meet the required standards. One common method is through visual inspection, where trained inspectors visually examine the surface of the coil for any signs of waviness or unevenness. They look for any visible defects such as waves, buckles, or twists that may affect the flatness of the coil. Another method used for inspecting flatness is through the use of specialized equipment such as flatness gauges or profilometers. These instruments measure the surface profile of the coil and provide detailed information about any deviations from the desired flatness. They can detect both local and overall flatness issues, allowing for a more accurate assessment of the coil's quality. In addition to visual and instrumental inspections, steel coils can also undergo physical tests to assess their flatness. One such test is the "drape" test, where the coil is draped over a flat surface and any noticeable gaps or unevenness are measured. This test provides a quick and practical way to identify any major flatness issues. Furthermore, computerized analysis and simulation techniques are becoming increasingly popular for inspecting the flatness of steel coils. These methods involve using advanced software to analyze the coil's surface data and generate detailed reports on its flatness characteristics. By comparing the actual surface profile with the desired specifications, these techniques provide a comprehensive assessment of the coil's flatness. Overall, inspecting steel coils for flatness involves a combination of visual inspection, specialized equipment, physical tests, and advanced analysis techniques. These methods ensure that the coils meet the required flatness standards, which is crucial for their successful use in various industries like automotive, construction, and manufacturing.

Q: I personally don't believe the story of 8 guys who flew small planes can navigate passenger jets into buildings hundreds of miles away with that precision. It just doesn't make sense.I am wondering what the story surrounding the molten steel was, how could molten steel have been produced when fuel from the planes wasn't hot enough (it melts at 2850 degrees)?: that's just it: there wasn't very much molten steel for the very reason you point out. Jet fuel burns at 800° to 1500°F. This is not hot enough to melt structural steel. However, engineers say that for the World Trade Center towers to collapse, their steel frames didn't need to melt, they just had to lose some of their structural strength. Steel will lose about half its strength at 1,200 degrees F. The steel will also become distorted when heat is not a uniform temperature. after the collapse, a LOT of folks took a look at the remains. the result was the conclusion that the fire caused the central core of the building to weaken. When the floors collapsed one on top of the other, the weight was too much for the weaked core to bear, causing the result we are all familiar with. hope this helps

Q: I know that steel wool is coated with... something... that protects it from rusting. I need to know what that is, and how to get it off.: spun steel fibers have a microscopic coating of oil to prevent them from rusting. Rusting steel wool wouldn't sell very well. I would think that removing this oil could be accomplished with any good degreaser, like brake cleaner or the like. However, I've never tried this before. In science class they perform experiments by removing the oil with vinegar. After wringing out the steel wool pad, it is wrapped around a thermometer and placed in a sealed jar. After a few minutes the temperature rises because of the chemical reaction that takes place when four atoms of iron react with three atoms of oxygen and create two atoms of iron oxide - RUST! You can unwittingly recreate this experiment by using steel wool in the process of removing one or more layers of finish from a piece of furniture Hope this helps

Q: Steel is strong in both tension and compression. Concrete is only strong in compression, and is very fragile in tension. Plus, concrete is heavy--a huge drawback in, say, a bridge deck. And its fairly expensive. And it hides the condition of the steel embedded within it. So what does it bring to the table? Why use it at all?: Steel is strong in both tension and compression. No Steel is strong in tension. Under compression it will bend. Example. Take a steel cable. stretch it (Ok you cant) Now compress it. it bends. Bridges generally need support from below. So you need something thats strong under compression. IE concrete. However concrete can fail if it gets a tension - so pre-tensioned steel rods are cast into it to take any such tension (stretching or bending) forces.

Q: what is the porpose of preheating mild steel prior to welding: For most mild steel, it is not necessary to preheat the steel, even in thick sections. Preheating, as well as maintaining interpass temperatures is sometime used when welding high-strength or high-performance steels. This reduces the likelihood of weld cracks. Mild steel is ductile enough that weld cracks aren't usually a problem. Preheating reduces the speed at which the weld cools and solidifies. in high-strength steels, this produces a more ductile microstructure in the weld and heat affected zone, thus reducing the possibility of hot and cold cracks. This also may improve some of the mechanical properties of the H.A.Z., such as impact toughness. The slower cooling rate allows more time for hydrogen to diffuse out of the weld, reducing the potential for hydrogen embrittlement. Hydrogen is produced when water vapor reacts with the steel at high temperatures, producing iron oxide and hydrogen gas. Some steels can be damaged by even relatively small amounts of hydrogen. Electrodes used in flux core arc welding and in shielded metal arc welding often contain fluxes which tend to absorb moisture from the air. Also, rust and mill scale contain water molecules which are chemically bound to the iron atoms. Note that hydrogen embrittlement is generally not an issue with mild steel, due to it's low carbon and alloy content. Preheating also reduces shrinkage stresses, due to the slower cooling rate. This is beneficial in parts which are heavily restrained, or where distortion is a particular concern.

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