First Class Cold Rolled Sheet Coil System 1

First Class Cold Rolled Sheet Coil

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Specification

Product Name	Cold Rolled Sheet Coil
Material	SPCC/SPCD/SPCE/DC01/ST12/ ST14/SPCD/DC03/DC04 ect.
Grade Standard	JIS G3302, EN10142, ASTM653, ASTM95
Thickness	0.15-3.5mm
Width	600mm-1500mm
Coil ID	508-610mm
Coil OD	max 1500mm
Weight	3-10 Tons
Tolerance	Thickness tolerance:+/-0.02mm; Width tolerance:+/-5mm
Surface	No-skin passed or Skin passed, Tensile leveled
Surface Treatment	Chromate/Unchromate passivation, fingerprint resistant treatment, oiled/unoiled
Annual Output	350,000MT
Application	Construction, hardware, home applicances, interior decoration

General Application of Cold Rolled Steel Coil:

Classification	Designation	Characteristics	Main applications
Commercial quality	SPCC SPCCT	Commercial quality suitable for bending fabrication and simple forming; this is the type in greatest demand.	Refrigerators, cabinets, power distribution baords and drums.
Drawing quality	SPCD	Drawing quality second only to that of SPCEN. Excellent uniformity.	Automobile floor and roof panels.
Deep-drawing quality	SPCE SPCF	Deep-drawing quality.With metallurgically controlled grain size, it retains its beautiful finish even after being deep-drawn.	Automobile fenders and quarter panels
Extra deep-drawing quality	SPCG	Extra-low-carbon steel sheets with highest workability	Automobile internal panels and deep-drawn parts

Production Flow Chart

Specification

1. Thickness: 0.4-2.0mm

2. Width: 900-1250mm

3. Inner Diameter: 508 & 610mm

4. Weight of Steel Coil: 3-15MT

5. Heat Treatment: Annealed + Smoothed

6. Margin Status: EC & EM

7. Surface Quality: FC & FD

8. Surface Treatment: Oiling

9. Surface Status: Bright

Chemical Components

Grade	Chemical Components
Grade	C	Mn	P	S	Alt
St12	≤0.10	≤0.50	≤0.035	≤0.025	≥0.020
St13	≤0.08	≤0.45	≤0.030	≤0.025	≥0.020
St14	≤0.08	≤0.40	≤0.025	≤0.020	≥0.020

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%

Q:At what temperature does steel start to warp or soften.: It depends upon the composition of steel. Carbon steel, which does not have many alloying elements, softens around 1200C while with alloying elements, this transition temperature either drops or raises depending upon what is added. Higher carbon makes this temperature drop. This is a very important question for forging since if a lower temperature is used, forging won't be easy and at higher than softening temperature, it is not easy to handle. The temperature at which steel begins to soften is, in general, much above what the metallurgists call AC1 or AC3 temperature.

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: 1. Strength and durability: Steel is known for its strength and durability, making it an ideal material for pipes. Steel coils provide a strong foundation for pipes, ensuring they can withstand high-pressure applications and resist damage from external factors such as impact or corrosion. This strength and durability enhance the longevity of the pipes, reducing the need for frequent replacements. 2. Flexibility: Steel coils offer flexibility in terms of customization and design. They can be easily formed into various pipe shapes and sizes, allowing manufacturers to produce pipes that meet specific project requirements. This flexibility also enables the production of seamless pipes, which have superior structural integrity and reduced risk of leakage. 3. Thermal resistance: Steel has excellent thermal conductivity, meaning it can efficiently transfer heat or cold. This property is crucial for pipes used in industries such as oil and gas, where temperature control is essential. Steel coils enable the manufacturing of pipes that can effectively handle extreme temperatures, preventing any damage to the pipes or the substances flowing through them. 4. Cost-effectiveness: Steel coils can be produced in large quantities, resulting in economies of scale and lower production costs. This cost-effectiveness is beneficial for both manufacturers and consumers, as it helps keep the overall cost of pipes down. Additionally, the durability of steel pipes reduces the need for frequent repairs or replacements, saving money in the long run. 5. Corrosion resistance: Steel coils can be coated with protective layers to enhance their resistance to corrosion. This corrosion resistance is crucial in applications where pipes come into contact with corrosive substances or are exposed to harsh environmental conditions. By using steel coils with appropriate coatings, manufacturers can ensure that their pipes have a longer lifespan and maintain their structural integrity under challenging circumstances. Overall, the use of steel coils in pipe manufacturing offers numerous advantages, including strength, flexibility, thermal resistance, cost-effectiveness, and corrosion resistance. These benefits make steel coils a preferred choice for many industries that rely on durable and efficient piping systems.

Q:How are steel coils used in the production of pipes?: Steel coils are used in the production of pipes by being uncoiled and then passed through a series of forming and welding processes. The coils are flattened and shaped into the desired pipe size and then welded together to create a continuous length of pipe.

Q:This EN10025 S355JR is a European code for steel, of which the properties can be found here.: *EN 10 025 S355JR/JO is comes under structural steel catagories. Equivalent standard is-ASTM A 572 Gr 50. -Above areHigher strength micro-alloyed steel. -The above-mentioned structural steel grades may be welded using any of the standard metal arc and resistance welding processes, usually without any special precautions.

Q:How are steel coils used in the production of automotive stampings?: Steel coils are an essential component in the production of automotive stampings. These coils are typically made from high-quality steel and are cut into specific widths and lengths to meet the requirements of automotive manufacturers. The first step in using steel coils for automotive stampings is to uncoil the steel. This is done using a machine called a decoiler, which unwinds the coil and feeds it into the stamping machine. The decoiler ensures a continuous supply of steel for the stamping process. Once the steel coil is unwound, it is fed into the stamping machine, which is equipped with a die that shapes the steel into the desired automotive component. The die is designed to create precise and complex shapes, such as car body panels, doors, fenders, or structural components. The stamping machine applies force to the steel coil, pressing it against the die and forming it into the desired shape. The high-quality steel used in the coils ensures that the stamped components have the necessary strength and durability required for automotive applications. After the stamping process, the stamped components are inspected for quality and precision. Any imperfections or defects are identified and corrected before the components are sent for further processing, such as painting, welding, or assembly. Overall, steel coils play a crucial role in the production of automotive stampings. They provide a continuous supply of high-quality steel, which is shaped into precise and durable automotive components. The use of steel coils ensures that the automotive stampings meet the required standards for strength, durability, and precision.

Q:What is the standard length of steel coils?: The standard length of steel coils can vary depending on the industry and specific requirements, but common lengths range from 30 feet to 60 feet.

Q:I need details for steel column splices welded or bolted. References or autocad blocks will be very useful. Thank you very much!: The refernce for Canada is S16-01 Limit states steel design My professor always taugth us shop weld field bolt if that helps

Q:i know that steel helmets werent meant to stop bullets, but i was wondering do they have an value whatsoever for stopping bullets, or is that just yet another thing that hollywood made up(like the omaha beach scene in saving private rian): richard S is right. They were designed to deflect shrapnel more than anything else, but I have seen few cases where a round striking at the right angle was deflected enough to safe the soldier. The new Kevlar helmets perform much better, I have seen them stop an AK 47 round (7.62x39MM) and they will stop most military handgun rounds. shoot safe

Q:My teacher says if they were that they would still be standing today. I'm not sure if he means the reinforced steel in the concrete beams, columns etc or if the whole beams and columns floor etc were were made of reinforced steel.: There is no way you could make a 110 floor building out of concrete.

Q:Why people prefer prefabricated buildings these days? Recently my friend has told me that he is going to owe a steel house so I was just thinking are these steel structures really durable and cheaper than concrete structures?: It really depends upon the environment and the construction techniques used. Steel that is painted or coated will without maintenance eventually rust. I would expect this tendency to be exacerbated in a humid or shore environment. Heat may tend to cook a steel house and the structure does not add much thermal mass. Construction techniques tend to be fairly quick a part of the construction is essentially prefabricated. Work done in a factory will almost always be cheaper than work done in the field, all things being equal. Concrete can be fairly hi tech with lots of equipment or as seen in many parts of the world fairly low tech with lots of laborers. It is easy to change the characteristics of concrete depending upon how it is mixed, reinforced, and treated during the curing process. Because it is applied in a relatively fluid state it can flow around obstructions like bedrock and be formed up into interesting shapes. A concrete structure can be cooler as it provides thermal mass, and a heat sink. It's resulting rigidity may make it more subject to earthquakes than steel. We do really need to be smarter in constructing our homes to make them fit the land and not only the general environment but our particular micro environment.

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