Cold Rolled Steel (DC01) for Building Materials

Cold Rolled Steel (DC01) for Building Materials System 1

Cold Rolled Steel (DC01) for Building Materials

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Basic Info.

Model NO.:Dc01

Technique:Cold Rolled

Standard:EN

Steel Grade:DC01

Export Markets:Global

Additional Info.

Trademark:CWG

Packing:Standard Seaworthy Packing, Bundle or Pallet

Standard:EN

Origin:China

HS Code:72099000

Product Description

1.Surface : General, Bright, Dull and Mirror finish, oiled or unoiled
2.Thickness: 0.1mm-3.5mm
3. Width:1000mm,1250mm, special width
4. Provide original mill test certificate and original production certificate of these standards
5. Coil ID: 508mm. 610mm
6. Coil weight: 4-15MT as per client's requirement
7. Trade term: FOB/ CIF/ CFR
8.Application:Construction filed, shiping building industry, petroleum&cheical industry, war and electricity industries, food processing and medical industry, boiler heat exchanger, machinery and hardware fileds.

Cold Rolled Steel is steel that has been worked below its recrystallization temperature by passing it between a pair of rollers. Recrystallization temperature is the temperature at which grains in the lattice structure of the metal have been rearranged, leaving it free of strain and deformations. Cold Rolled Steel is pre-treated before being cold rolled with a process known as pickling, which uses strong acids to remove scale and other impurities. The Cold Rolled Steel is then passed through rollers to reduce its thickness. Most cold rolling takes place in multiple passes and as the size of the Cold Rolled Steel is further reduced, its strength and hardness both increase, but its ductility decreases. After cold rolling, heating the metal up in a process known as annealing can restore some of its ductility. The final Cold Rolled Steel coil may be manufactured in the form of sheets, strips, bars, or other forms

Q: What are the common coil thicknesses available for steel coils?: The common coil thicknesses available for steel coils range from 0.15mm to 25mm, depending on the specific requirements and applications.

Q: Maybe it is obvious. But i have thought alot about it.I thought steel at a cool temperature was unbreakable. I am not one for science or physics or engineering (i am a political science major). But i don't understand why the planes that struck the world trade center on 9-11 didn't just dent the side and fall,How did the place break the steel? Was it the velocity? Is steel easily broken?I realized that i wasn't taught how the planes broke the steel, and that no one ever asked. I searched the web and i couldn't find the answer or even anyone who had asked the question before.(i don't care about conspiracy theories, i just want scientific facts): I saw a one-hour program about this on PBS a couple of years ago. The buildings were constructed with the concrete-clad steel supporting columns at the center of the buildings, with a relatively thin lattice of steel struts along the outer wall. When the planes hit, they sheered through the thin steel struts easily by sheer momentum, while, at the same time, the thin steel stripped off the wings. The bodies of the planes got as far as the supporting columns in the center of the buildings, but were stopped there. The heaviest, densest pieces, the engines, went completely through the buildings and popped out the other side. It's important to understand that even light materials can cut through metal, if the light material is going fast enough. I saw this first hand, when I was in the Navy and stationed on board ship. We had a helicopter crash on our flight deck during heavy weather. The blades were made of light, carbon-composite material, but they were going so fast that they cut through the aluminum deck. I still have photos of that damage.

Q: Or is it a coating that is applied? If so what types of steel? Or what types of coatings?: there is a weathering steel that corrodes and then stops. The outer surface of the steel is a rusty looking brown but after the first layer of rust appears, the process stops. It used to be called A588 steel. So called mild steel is not A36 anymore, it is A992 (50 ksi yield). The only material that is A36 anymore are angles, channels, and plate. You can coat the steel with an epoxy coating to protect the steel from this highly corrosive environment. Google a company called TNEMEC. They offer epoxy coatings for steel and other coatings. Weathering steel and epoxy coating are not cheap options.

Q: How are steel coils inspected for weldability using welding tests?: Steel coils can be inspected for weldability using various welding tests. One common method is the bend test, where a sample of the coil is bent to evaluate the ductility and resistance to cracking. Another test is the tensile test, which measures the strength and elongation of the steel under tension. Additionally, the charpy impact test assesses the steel's toughness by measuring its ability to absorb energy during impact. These tests help determine the suitability of the steel coils for welding applications and ensure the quality of the welds.

Q: What are the common coil packaging materials?: Common coil packaging materials include plastic wrap, stretch film, steel strapping, and wooden crates. These materials are used to protect and secure coils during storage and transportation, ensuring they remain intact and undamaged.

Q: What are the different coating options for steel coils?: Steel coils have multiple options for coating, each with its own purpose and benefits. Some commonly used coatings for steel coils include the following: 1. Galvanized Coating: Steel coils are immersed in molten zinc, resulting in a zinc layer on the surface. This coating offers excellent corrosion resistance and protects against rust. It is ideal for harsh environments and moisture exposure. 2. Galvannealed Coating: This coating combines galvanizing and annealing processes. After galvanizing, the steel coils are annealed to create a zinc-iron alloy layer. Galvannealed coating provides enhanced paintability, weldability, and corrosion resistance. 3. Aluminum-Zinc Alloy Coating: Also known as Galvalume, this coating involves applying an aluminum-zinc alloy to the steel coils. It offers excellent corrosion resistance and heat reflectivity, making it suitable for roofing, siding, and automotive parts. 4. Organic Coatings: These coatings are typically applied as a top layer over a base coat of galvanized or galvannealed coating. Examples include paints, lacquers, and powder coatings. Organic coatings provide additional protection against corrosion, UV rays, and abrasion while enhancing the aesthetics of the steel coils. 5. Chromate Conversion Coating: This coating is commonly used as a pre-treatment before applying organic coatings. It improves adhesion between the steel surface and the organic coating, ensuring better corrosion resistance. The choice of coating depends on factors such as the intended application, environmental conditions, desired appearance, and budget. Manufacturers and end-users should carefully consider these factors to select the most suitable coating option for their specific requirements.

Q: How do steel coils contribute to sound insulation in buildings?: Steel coils contribute to sound insulation in buildings by absorbing and dampening sound vibrations. The dense and heavy nature of steel helps to reduce the transmission of sound waves, preventing them from traveling through walls and floors. Additionally, steel coils can be used as a core material in soundproofing panels, enhancing their effectiveness in reducing noise transmission.

Q: What is the process of uncoiling a steel coil?: The process of uncoiling a steel coil involves placing the coil on a mandrel or a reel, then using a motorized or manual unwinding mechanism to slowly unwind the coil. The coil is typically fed through a straightening device to remove any bends or twists before it is further processed or cut into desired lengths.

Q: What are the different methods of pickling steel coils?: There are several methods of pickling steel coils, including acid pickling, electrolytic pickling, and mechanical pickling. Acid pickling involves immersing the coils in a bath of diluted acid, such as sulfuric acid or hydrochloric acid, to remove surface oxides and impurities. Electrolytic pickling uses an electric current to remove the oxide layer from the steel coils, usually in a solution of sulfuric acid. Mechanical pickling involves scrubbing the coils with abrasive materials or using mechanical rollers to remove the scale and impurities. Each method has its own advantages and is chosen based on the specific requirements and conditions of the steel coils.

Q: How are steel coils used in the production of storage tanks?: Steel coils are used in the production of storage tanks as they provide the necessary strength and durability required for containment and storage of various substances. These coils are rolled into cylindrical shapes and welded together to form the tank's body, ensuring a tight and secure structure. Additionally, the steel coils can be coated or treated to provide corrosion resistance, further enhancing the tank's longevity and suitability for storing liquids or gases.

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