Chines Best Cold Rolled Steel Coil JIS G 3302

Chines Best Cold Rolled Steel Coil JIS G 3302 System 1

Chines Best Cold Rolled Steel Coil JIS G 3302 System 2

Chines Best Cold Rolled Steel Coil JIS G 3302 System 3

Chines Best Cold Rolled Steel Coil JIS G 3302

Ref Price:

Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 2222222 m.t.

Supply Capability:: 1212123 m.t./month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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

Chines Best Cold Rolled Steel Coil JIS G 3302

2.Cold Rolled Steel Specification

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

Grade: Q195~Q345

Thickness: 0.16mm~1.5mm,0.16-1.5mm

Width: 1250,600-1250mm

Coil weight:3-12 MT

Coil ID:508/610mm

Chemical composition:

0.150

0.476

11.231

12.50

0.900

0.039

0.010

5.FAQ of Cold Rolled Steel

We have organized several common questions for our clients，may help you sincerely：

1.How about your company？

A world class manufacturer & supplier of castings forging in carbon steel and alloy steel，is one of the large-scale professional investment casting production bases in China,consisting of both casting foundry forging and machining factory. Annually more than 8000 tons Precision casting and forging parts are exported to markets in Europe,America and Japan. OEM casting and forging service available according to customer’s requirements.

2.How to guarantee the quality of the products？

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

3. 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: What are the different methods of annealing steel coils?: There are several different methods of annealing steel coils, each with its own advantages and applications. The main methods include full annealing, process annealing, and spheroidize annealing. Full annealing is the most common method and involves heating the steel coils to a temperature above its critical point, typically between 800 and 900 degrees Celsius (1472 and 1652 degrees Fahrenheit), and then slowly cooling it down in a controlled manner. This process helps to refine the grain structure of the steel, making it softer and more ductile. Full annealing is often used to relieve internal stresses, improve machinability, and enhance the overall mechanical properties of the steel. Process annealing, also known as subcritical annealing or stress relief annealing, is a method used to reduce the hardness and brittleness of steel coils. It involves heating the coils to a temperature below its critical point, typically between 550 and 650 degrees Celsius (1022 and 1202 degrees Fahrenheit), and then slowly cooling them down. This process helps to relieve internal stresses that may have developed during previous manufacturing processes, such as cold working or welding. Process annealing is commonly used to improve the formability and toughness of steel coils. Spheroidize annealing is a specific type of annealing that is used to soften high carbon and alloy steels. It involves heating the steel coils to a temperature slightly below its critical point, typically between 650 and 700 degrees Celsius (1202 and 1292 degrees Fahrenheit), and then holding it at that temperature for a prolonged period of time. This allows the carbides within the steel to transform into rounded or spheroidal shapes, which increases the steel's machinability and ductility. Spheroidize annealing is often employed in the production of cutting tools, bearings, and other applications where improved machinability is desired. In addition to these main methods, there are also variations and specialized techniques that can be used for specific purposes, such as recrystallization annealing, intercritical annealing, and solution annealing. Each method has its own set of parameters and temperature ranges, and the choice of annealing method depends on factors such as the type of steel, desired mechanical properties, and the intended application of the steel coils.

Q: How are steel coils inspected for hardness?: Various methods are used to inspect the hardness of steel coils, ensuring their quality and suitability for specific applications. The Rockwell hardness test is a common method, involving the use of a diamond or ball indenter pressed into the coil's surface to measure indentation depth. The hardness value is then determined based on this measurement. Another method is the Brinell hardness test, which uses a hardened steel or tungsten carbide ball indenter to create an indentation on the coil's surface. The diameter of the indentation is measured, and the hardness value is calculated using a formula that considers the applied load and indentation diameter. On the other hand, the Vickers hardness test utilizes a pyramidal diamond indenter to create an indentation on the coil's surface. The lengths of the indentation diagonals are measured, and the hardness value is calculated using a formula that takes into account the applied load and diagonal lengths. In addition to these traditional methods, modern technology has introduced non-destructive testing techniques such as ultrasonic testing and eddy current testing. Ultrasonic testing involves transmitting ultrasonic waves through the coil and measuring the time it takes for the waves to return. Changes in the wave pattern can indicate variations in hardness. Eddy current testing, on the other hand, uses electromagnetic induction to detect changes in electrical conductivity, which can be correlated to hardness variations in the steel coil. Overall, steel coils undergo thorough inspection using a combination of traditional and advanced techniques to ensure their hardness meets the required specifications. These inspections are vital in maintaining the quality and dependability of steel products in various industries.

Q: Like 49ers. Pittsburgh have long history of steel industry?: Yes. US Steel used to be in Pittsburgh, before Reagan let them move and destroyed Pittsburgh. Pittsburgh also used to have more than 1 million residents (in the early 80s) but now has less than 300K. The Pittsburgh Steelers symbol is the US Steel symbol, colored in.

Q: What are the different types of steel coil surface treatments for indoor applications?: The different types of steel coil surface treatments for indoor applications include hot-dip galvanizing, electro-galvanizing, and organic coating.

Q: Why is the selection of steel building erector of extreme importance while starting a new steel building project?: Steel building erectors play an important role as they are well versed with all the ups and downs of erecting a steel building and can prevent your construction project from unnecessary delays. There are lot of inexperienced steel building erectors in the market who can offer you their services at a much cheaper rate. Be cautious! It never works in the long run. A qualified steel building erector will always provide an initial professional insight of your project and cost effective solutions for your project.

Q: What are the different types of steel coil recoiling methods?: There are three main types of steel coil recoiling methods: slit edge recoiling, mill edge recoiling, and oscillated recoiling.

Q: They are showing on tv a special on how the new World Trade Center, building 1, is being built. Focusing on the steel and the guys fitting everything together.Where do builders go to buy all that steel framing? We do not build really tall buildings where I live so most of the steel is cut and welded on the job site. At World Trade Center 1, they seem to get the steel on trucks; already cut and welded.: The steel is all custom fabricated in what are called structural steel fabrication shops. Each Building is designed by architects then the frame is designed by engineers to support whatever load is being applied to the building. After the engineering is done it goes out for a bid package where a fab shop estimates how much to charge for the fabrication of the steel and the erection of the steel. Once a company wins the bid, it then has to design how the steel will connect with one another and have it approved by an engineering firm to assure the connections are strong enough. Once all of that happens the fab shop orders raw steel beams and angle iron and steel plate at stock lengths. Beams are then cut into the right length and holes drilled in the proper places. The beam is then marked with a number that tells the erectors where it goes. The steel is then shipped out in batches to the construction site where it is unloaded and shook out into an organized place to grab them with a crane. They are then put together like a toy model, there are instructions that say what beam goes where and what size bolt to use. The welding you see being done is on really critical moments that need extra strength. That is about how it goes in a nutshell. It is a bit more complicated than that but it gives you an idea.

Q: What are the common welding techniques used for steel coils?: The common welding techniques used for steel coils include shielded metal arc welding (SMAW), gas metal arc welding (GMAW), and flux-cored arc welding (FCAW). SMAW, also known as stick welding, is a manual welding process where an electric current is used to create an arc between the welding electrode and the base material. The electrode is coated with a flux material that provides a shielding gas to protect the weld from atmospheric contamination. This technique is versatile and can be used for both thick and thin steel coils. GMAW, commonly referred to as MIG (metal inert gas) welding, is an automated process that uses a continuous wire electrode and a shielding gas to protect the weld area. The electrode is fed through a welding gun, and an electric current creates an arc between the wire and the base material. This technique is fast and efficient, making it suitable for high-volume production of steel coils. FCAW is a variation of GMAW that uses a tubular electrode filled with flux instead of a solid wire. The flux provides a shielding gas and also releases additional fluxing agents to protect the weld from impurities. FCAW is often preferred for welding thicker steel coils as it provides better penetration and higher deposition rates. In addition to these techniques, other welding methods like laser welding and electron beam welding can also be used for specific applications in steel coil manufacturing. These techniques offer precise and high-quality welds but are typically more expensive and require specialized equipment. Overall, the choice of welding technique for steel coils depends on factors such as the thickness of the material, production volume, and specific requirements of the end product.

Q: What are the common uses of coated steel coils?: Common uses of coated steel coils include roofing, siding, automotive parts, appliances, and building materials. The coating on the steel helps to protect it from corrosion and enhances its durability, making it suitable for various applications in industries such as construction, manufacturing, and transportation.

Q: How do steel coil manufacturers handle custom orders?: Steel coil manufacturers handle custom orders by first understanding the specific requirements and preferences of the customer. They then work closely with the customer to determine the desired specifications, including dimensions, thickness, width, coating, and any other specific requirements. The manufacturer uses their expertise and production capabilities to customize the steel coils accordingly. This may involve adjusting the production process, modifying machinery settings, or using different materials. Effective communication and collaboration between the manufacturer and the customer play a crucial role in ensuring the successful fulfillment of custom orders.

Send your message to us

*Email

*TEL

*Quantity

*Unit