• Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality System 1
  • Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality System 2
  • Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality System 3
  • Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality System 4
Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
50 m.t.
Supply Capability:
10000 m.t./month

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Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

1.Structure of Cold Rolled Steel Description

The raw material of cold rolled steel coil/sheet is high quality hot rolled product, and after pickling continuous rolling, degreasing, annealing,skin pass,slitting and cut to length line etc. Along with it many kinds of new  technology and new process of global cold rolling production have been applied. Therefore the quality of the goods could be guaranteed. The product is widely used in outdoor and interior decoration, furnishing manufacturing, home appliance, automobile etc.

2.Main Features of the Cold Rolled Steel

• Excellent process capability

• Smooth and flat surface

• Workability, durability

• Excellent heat resistance performance

• High strength

• Good formability

• Good visual effect

 

3. Cold Rolled Steel Images

Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

Chinese Best Cold Rolled Steel Coil JIS G 3302 -Best Quality

 

4.Cold Rolled Steel Specification

Standard:AISI,ASTM,DIN,GB,JIS,JIS G3302 ASTM 653M EN10142

Grade: Q195~Q345

Thickness: 0.16mm~2.0mm

Width: 1250mm MAX

Coil weight:3-12 MT

Coil ID:508/610mm

Chemical composition:

C

Si

Mn

Cr

Ni

P

S

0.150

0.476

11.231

12.50

0.900

0.039

0.010

 

 

5. FAQ of Cold Rolled Steel

1.How to guarantee the quality of the products

We have established the international advanced quality management systemevery link from raw material to final product we have strict quality testWe resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.

2. 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: I heard on some shows that you can carbonise steel by heating it red hot then dropping it in black oil. i cant find this no where online, and the process for commercial carbon steel is totally different. can you really carbonise regular steel by heating it to red hot then dropping it in regular black oil. i saw it on mythbusters once. when the made carbon steel hammers to test if 2 hammers smashed together will shatter
Carburized steel is not the same thing as carbon steel. All steel has carbon in it, but carbon steel is defined as Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, molybdenum, nickel, niobium, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 1.04 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60. Carburizing is a surface treatment. Dropping hot steel in oil is oil quenching. It might get a little carbon in the surface, but oil quenching is mainly used as a slightly slower quenching process than water quenching, not for carburizing. Once it starts cooling down the carbon won't diffuse in. Quenching is used to change the hardness. The simplest way to carburize steel is to pack charcoal around it and heat it to 900 C or so. Industrial processes use a gas like carbon monoxide, but that's mostly just for easier process control.
Q: I want to design and fab a steel helmet like that in the latest Batman cartoon movie. Only problem I can foresee is staining the metal red.
This okorder
Q: How are steel coils used in construction?
Steel coils are commonly used in construction for a variety of purposes, such as creating structural frameworks, reinforcing concrete, and manufacturing various building components like beams, columns, and trusses. The coils are unrolled and cut to specific dimensions, allowing them to be easily shaped and welded into various structural elements. This versatile material provides strength, durability, and flexibility, making it an essential component in constructing buildings, bridges, and other infrastructure projects.
Q: How are steel coils inspected for quality control?
Steel coils are inspected for quality control through various methods. One common method is visual inspection, where trained professionals visually examine the coils for any surface defects, such as scratches, dents, or discoloration. Additionally, non-destructive testing techniques like ultrasonic testing are used to detect any internal defects, such as cracks or voids. Dimensional measurements are also taken to ensure the coils meet the required size and thickness specifications. These comprehensive inspections help ensure the overall quality and integrity of steel coils before they are used in various industries.
Q: How does the surface finish of steel coils affect their performance?
The surface finish of steel coils plays a significant role in determining their performance. A smooth and uniform surface finish enhances the coil's ability to resist corrosion, improves its aesthetic appeal, and allows for easier cleaning and maintenance. It also facilitates better adhesion of coatings or finishes, which can enhance the coil's durability and protect it from environmental factors. On the other hand, a rough or uneven surface finish may compromise the coil's performance by promoting corrosion, reducing its ability to withstand wear and tear, and potentially impairing its functionality in certain applications. Therefore, the surface finish of steel coils is a critical factor that directly impacts their overall performance and longevity.
Q: How are steel coils inspected for surface defects after processing?
Steel coils are inspected for surface defects after processing through a visual inspection process. Specially trained inspectors carefully examine the coils for any visible defects such as scratches, dents, or irregularities in the surface. They use advanced lighting techniques and magnification tools to ensure a thorough inspection. Additionally, automated systems may also be employed to detect and flag any defects that may have been missed during the visual inspection.
Q: What are the different types of steel coil cutting tools?
There are several different types of steel coil cutting tools available in the market. These tools are specifically designed to cut steel coils efficiently and accurately. Some of the common types of steel coil cutting tools are: 1. Slitting shears: Slitting shears are widely used for cutting steel coils into narrow strips. These shears have multiple blades that make clean and precise cuts without causing any damage to the material. They are typically used for high-volume production and can handle various thicknesses of steel coils. 2. Rotary shears: Rotary shears are another type of cutting tool commonly used for cutting steel coils. They consist of rotating blades that shear through the material as it passes through. Rotary shears are ideal for cutting medium to thick steel coils and are known for their high cutting speed and accuracy. 3. Guillotine shears: Guillotine shears are heavy-duty cutting tools that can handle thick steel coils. They work by using a downward force to cut through the material with a single clean stroke. Guillotine shears are known for their power and precision, making them suitable for cutting large volumes of steel coils. 4. Laser cutting machines: Laser cutting machines are advanced cutting tools that use a high-powered laser beam to cut through steel coils. They offer precise and intricate cuts with minimal heat distortion. Laser cutting machines are ideal for cutting complex shapes and patterns on steel coils. 5. Water jet cutting machines: Water jet cutting machines use a high-pressure stream of water mixed with abrasive particles to cut through steel coils. This method is highly accurate and does not generate heat, making it suitable for cutting heat-sensitive materials. Water jet cutting machines can cut through various thicknesses of steel coils and produce smooth edges. Each type of steel coil cutting tool has its own advantages and is suitable for different applications. The choice of tool depends on factors such as the thickness of the steel coil, required precision, production volume, and budget.
Q: What is the role of steel coils in the production of appliances?
The role of steel coils in the production of appliances is to provide a strong and durable material for various components, such as the outer body, internal structures, and key parts. Steel coils are used to manufacture appliance parts like panels, frames, and brackets, ensuring stability, strength, and longevity. The versatility and strength of steel make it an ideal choice for appliances, as it can withstand heavy loads and provide the necessary support and protection.
Q: so my parents gave me stainless steel cookware for christmas and the first time i used it i cooked chicken. it stuck to the pan and where the oil splattered it cooked on and turned it dark black and brownish. and the bottom too. i don't cook with it because i don't want to burn it on anymore but i don't know how to clean it. how do i cook without burning anything, aside from a lower flame and how on earth do i get the stains on. i've tried almost everything too! thanks.
Use oven cleaner. It will take off the burnt on stuff just like it does in the oven. Spray it on, put the cover on the pot and let it sit for a while. If the problem is on the outside, do the same but put the whole thing in a garbage bag to control the fumes. Wash the pot like you would normally to get the oven cleaner off. You will want to wear gloves too. Oven cleaner is very caustic. By the time you realize you are being burned by it, it's too late. The oven cleaner should do nothing to the finish of the stainless.
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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