Cold Rolled Steel/ Steel Rolled different size

Cold Rolled Steel/ Steel Rolled different size System 1

Cold Rolled Steel/ Steel Rolled different size

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 20 m.t.

Supply Capability:: 10000 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/ 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:What are the common coil width tolerances?: The common coil width tolerances vary depending on the industry and specific application. However, typical coil width tolerances range from +/- 0.005 to 0.030 inches.

Q:What is the role of steel coils in the electrical industry?: The electrical industry greatly relies on steel coils due to their versatile applications and significant contributions. Transformers, which play a crucial role in power distribution and voltage regulation, utilize steel coils as essential components. These coils facilitate the transfer of electrical energy between circuits, enabling efficient transmission over long distances. Moreover, electric motors and generators heavily rely on steel coils. These coils are wound around the stator and rotor, creating magnetic fields that facilitate the conversion of electrical energy into mechanical energy and vice versa. This conversion process holds immense importance in industries such as automotive, manufacturing, and renewable energy. Steel coils also serve a vital purpose in the production of electrical cables and wiring. They provide strength, durability, and protection to the conductive copper or aluminum wires within the cables, ensuring their structural integrity. This, in turn, guarantees safe and efficient electricity transmission. Additionally, steel coils find application in electrical equipment like solenoids and relays. Their presence enables the creation of magnetic fields that control the flow of electrical current. Furthermore, various electrical appliances, including refrigerators, air conditioners, and televisions, rely on steel coils as crucial components for their proper functioning. In conclusion, the role of steel coils in the electrical industry cannot be overstated. From transformers to motors, generators, cables, and electrical equipment, these coils contribute significantly to the efficient distribution, conversion, and transmission of electrical energy.

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.

Q:which pokemon has the most steel pokemon???: Transformers.

Q:How do steel coils contribute to the automotive manufacturing sector?: Steel coils are essential in the automotive manufacturing sector as they are used to produce various components such as body parts, frames, and suspension systems. The high strength and durability of steel coils make them ideal for ensuring the safety and structural integrity of vehicles. Additionally, steel coils are easily moldable, allowing manufacturers to create complex shapes and designs, contributing to the overall aesthetics and functionality of automobiles.

Q:How do steel coils contribute to the construction industry?: Steel coils are essential in the construction industry as they are used to manufacture a wide range of structural components and materials. These coils are transformed into beams, pipes, sheets, and other forms, providing the necessary strength and durability required for construction projects. Steel coils also offer versatility, allowing for customization and adaptation to meet specific project requirements. Their contribution to the construction industry is undeniable, as steel coils form the backbone of many structures, ensuring stability, safety, and longevity.

Q:How do steel coils compare to aluminum coils?: Steel coils are generally stronger and more durable than aluminum coils. They have a higher tensile strength and better resistance to impact and abrasion. However, aluminum coils are lighter, more corrosion-resistant, and have better thermal conductivity. The choice between steel and aluminum coils depends on the specific application and the desired characteristics such as strength, weight, and corrosion resistance.

Q:the difference between the original steel and mild steel from percentage of carbon: As the first answers suggest, the prolbem is that these terms are not specific, they are not scientifically or technically defined. This is like asking: what is the difference between a four door car and a sedan? There are hundreds of steel alloys ranging from Fe + a little C + very little else to alloy and tool steels with significant amounts of Cr, Ni, Si, and a number of other elements + C. And... for any given steel alloy, there are many different ways to heat treat it. A given piece of steel can be heat treated so hard and brittle that it could shatter like glass and then it could be heat treated to make it into a spring or heat treated to make it stretch like taffy. If you really want to understand steels, yes, there are lots of books on sword making (some written by people who actually understand steels) but... you need to study metallurgy. There are graduate level courses just on the metallurgy of steels. Of course to understand this course you need to understand a whole lot of fundamental metallurgy. All this stuff on steel makes perfect sense because, in terms of weight (tonage) produced, steel is, hands down, nothing else remotely comes close, the most important metal humans have.

Q:How are steel coils inspected for flatness variations?: Steel coils are inspected for flatness variations using specialized equipment such as laser or optical scanning systems. These systems measure the surface profile of the coil and identify any deviations from the desired flatness. The data collected is then analyzed to determine the extent of the variations and whether they meet the required tolerances.

Q:Can steel coils be coated with QR codes?: Yes, steel coils can be coated with QR codes. QR codes can be printed or etched onto a variety of surfaces, including steel. This allows for easy tracking, identification, and access to information about the steel coils during various stages of production, transportation, and storage.

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