Cold Rolled Steel/Black Steel Rolled different size

Cold Rolled Steel/Black Steel Rolled different size System 1

Cold Rolled Steel/Black Steel Rolled different size

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 9000 m.t./month

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Product Description

Brief Introduction
The 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. The 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 may be manufactured in the form of sheets, strips, bars, or other forms.

Specification
1. Thickness: 0.4-2.0mm
2. Width: 900-1250mm
3. Inner Diameter: 508mm
4. Weight of Steel Coil: 3-15MT
5. Heat Treatment: Annealed
6. Margin Status: EC & EM
7. Surface Quality: FB&FC
8. Surface Status: SB & SD
9. Surface Treatment: Oiling

Mechanical Properties
1. Yield Strength: ≤ 320MPa
2. Tensile Strength: ≤ 370MPa
3. Elongation (L=50mm, b=25mm) When:
(1) Nominal Thickness <0.25mm: 30%
(2) Nominal Thickness 0.25mm-<0.40: 32%
(3) Nominal Thickness 0.40-<0.60mm: 34%
(4) Nominal Thickness 0.60-<1.0mm: 36%
(5) Nominal Thickness 1.0-<1.6mm: 37%
(6) Nominal Thickness >1.6mm: 38%

Packing
We use Seaworthy Package to make sure Cold Rolled Steel is well-protected during the long ocean voyage.

Application
1. Base metal for coated and dipped products.
2. Home appliance
3. Precise welding tube
4. Flux cored welding wire
5. Bicycle, battery shell,
6. Automobile fitting, hardware
7. Enameling industry etc.

Superiority
1. High precision of dimensional tolerance
2. Excellent mechanical property such as the yield strength and tensile strength, etc.
3. Being highly resistant to denting
4. Exhibits useful magnetic properties
5. High quality surface finish and get well prepared for the surface coating
6. Available in a variety of sizes and shapes with characteristics useful in a wide range of applications

Chemical Components

Grade	Chemical Components
Grade	C	Mn	P	S	Alt
DC01	≤0.12	≤0.50	≤0.035	≤0.025	≥0.020
DC03	≤0.10	≤0.45	≤0.030	≤0.025	≥0.020
DC04	≤0.08	≤0.40	≤0.025	≤0.020	≥0.020

Cold Rolled Steel/Black Steel Rolled different size

FAQ

1. Do you have QC team?
Yeah, sure, our QC team is very important, they will keep the quality control for our products.for quality inspection every day.

Q:How are steel coils inspected for surface defects?: Steel coils are inspected for surface defects using various techniques such as visual inspection, automated systems, and magnetic particle inspection. Visual inspection involves trained personnel examining the coils for any visible defects or irregularities. Automated systems utilize cameras and sensors to detect defects and anomalies on the coil surfaces. Magnetic particle inspection, on the other hand, involves magnetizing the coil and applying magnetic particles to reveal any surface defects through the formation of visible indications. These methods ensure that steel coils meet quality standards before further processing or shipment.

Q:How are steel coils used in the manufacturing of crash structures?: Steel coils are used in the manufacturing of crash structures as they provide high strength and durability, making them ideal for absorbing impact energy and protecting occupants in case of a collision. The coils are typically shaped and formed into specific components of the crash structure, such as side sills or front rails, which are then integrated into the vehicle's frame. This ensures that the vehicle has the necessary rigidity and structural integrity to withstand and mitigate the forces generated during a crash, thereby enhancing the safety of the occupants.

Q:Can steel coils be coated with copper?: Yes, steel coils can be coated with copper. This process, known as copper coating or copper plating, involves applying a layer of copper onto the surface of the steel coil. This coating can provide various benefits such as enhanced corrosion resistance, improved conductivity, and aesthetic appeal.

Q:What are they worth today? As well as a 1943 steel nickel?: The article I am inclosing quotes the price at 50 cents, apparently the 1943 copper penny is worth thousands of dollars.

Q:Edward Humphrey wants to know... Can I use steel roofing on an older house?: ed like others have said yes you can and its relatively simple to do. ? is it steal you want or would to plastic they call it work. we've done several around here in central Illinois and we've done both. as far as putting boards under the metal we've only done that on one, usally you start at a bottom corner, work your way across the roof and up just as you do shingles, remember though unlike shingles these don't have any sealing strips, so under each overlap before putting the piece on you need to put a sealer bead on. the tubes from your local lumber yard work just fine. just remember dont hurry yourself into making mistakes and forgetting anything. i don't know if you have helpers but generally you can hire a high school kid to help put this on. it isn't really that hard.use whats called a barn screw to hold it onto your existing roof,( they are color coated, and have rubber gaskets) so no leaks where fastened unlike nails.

Q:How are steel coils used in the packaging industry?: Steel coils are used in the packaging industry to create sturdy and durable packaging materials, such as metal drums, cans, and containers. The coils are unwound and shaped into the desired form, providing a strong and protective barrier for various products during storage and transportation.

Q:3 bedroom rambler with attached garage. A bad hail storm in May damaged my white siding and roof. I am concerned insurance adjustThanks much.er will not give me replacement value for steel siding. Any one know the cost and where to buy in Minnesota.: I'm not sure of the cost but from experience having bought steel siding instead of vinyl for my home, if you can afford the difference it is well worth your money..I've had it for 25 years and it does hold up much better than vinyl!

Q:How are steel coils used in the production of electronic devices?: Steel coils find extensive application in the production of electronic devices, serving various purposes. One prominent utilization lies in the manufacturing of transformers and inductors, which constitute essential components in numerous electronic devices. These components comprise a coil of wire wound around a core, with steel coils often serving as the core material due to their magnetic properties. The magnetic properties of steel contribute to amplifying the magnetic fields generated by the coils, facilitating effective energy transfer and voltage regulation. Steel's magnetic attributes, such as high permeability and low hysteresis loss, make it an ideal material for such applications. Furthermore, steel coils are also integral to the production of printed circuit boards (PCBs). PCBs, acting as the backbone of most electronic devices, consist of a flat, non-conductive board like fiberglass, adorned with a thin layer of copper traces etched onto it. These copper traces establish the electrical connections between different components on the board. Steel coils play a role in the PCB fabrication process, specifically in the creation of stencils. These stencils are employed to apply solder paste onto the board before component placement. Laser-cut steel coils give rise to accurate and consistent stencil patterns, ensuring precise solder paste application. To summarize, steel coils fulfill a crucial function in the production of electronic devices. They are employed in the manufacturing of transformers and inductors, enhancing energy transfer and voltage regulation through their magnetic properties. Additionally, steel coils contribute to the fabrication of PCBs by creating stencils for solder paste application. Overall, the use of steel coils guarantees the efficient and dependable operation of electronic devices.

Q:Can steel coils be coated with anti-corrosive substances?: Yes, steel coils can be coated with anti-corrosive substances such as zinc, paint, or polymer coatings to protect them from rust and corrosion. These coatings act as a barrier between the steel surface and the surrounding environment, preventing contact with moisture and corrosive elements.

Q:Which one has more electrical resistivity? Wood or steel? And why?I know that the resistivity depends on the material of the conductor, but i want a perfect explaination please.Thnx in advance :): Steel is a conductor while wood is an insulator. There are no free electrons available in wood for conduction of electricity to take place. So wood has more electrical resistivity than that of steel.

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