Hight Quality of Cold Rolled Steel Sheet of China

Hight Quality of Cold Rolled Steel Sheet of China System 1

Hight Quality of Cold Rolled Steel Sheet of China

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 5000 m.t./month

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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

Hight Quality of Cold Rolled Steel Sheet of China

4.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:How much does a steel coil weigh?: The weight of a steel coil can vary depending on its size, thickness, and type of steel used. On average, steel coils can weigh anywhere from a few hundred pounds to several tons.

Q:Correct me if I am wrong, but steel is an alloy between iron and carbon. Does the carbon in the steel stops the iron from rusting or corroding? Also what is the difference between mild steel and stainless steel?: Mild steel is an alloy. It is the most common form of steel. Mild steel (a so-called carbon steel) is a general term for a range of low carbon (a maximum of about 0.3%) steels that have good strength and can be bent, worked or can be welded into an endless variety of shapes for uses from vehicles (like cars and ships) to building materials. The carbon does not stop the material rusting or corroding. In addition to iron, carbon, and chromium, modern stainless steel may also contain other elements, such as nickel, niobium, molybdenum, and titanium. Nickel, molybdenum, niobium, and chromium enhance the corrosion resistance of stainless steel. It is the addition of a minimum of 12% chromium to the steel that makes it resist rust, or stain 'less' than other types of steel. The chromium in the steel combines with oxygen in the atmosphere to form a thin, invisible layer of chrome-containing oxide, called the passive film. The sizes of chromium atoms and their oxides are similar, so they pack neatly together on the surface of the metal, forming a stable layer only a few atoms thick. If the metal is cut or scratched and the passive film is disrupted, more oxide will quickly form and recover the exposed surface, protecting it from oxidative corrosion.

Q:Specifically, for the main support beam found in a basement.: Glulam. Cheaper to buy, cheaper to install. Takes up less space than an I-beam.

Q:What are the common surface treatments for galvanized steel coils?: Some common surface treatments for galvanized steel coils include passivation, chromate conversion coating, and painting. Passivation helps to enhance the corrosion resistance of the galvanized coating, while chromate conversion coating provides additional protection and improves adhesion for subsequent paint coatings. Painting can be done to enhance aesthetics or to provide additional corrosion protection, depending on the specific requirements of the application.

Q:I want to experiment with making steel and want to especially make it stronger. And also I want to know if its possible to turn a meteorite into steel?: If you really want to do this, you should be getting some books on steel metallurgy rather than asking on Yahoo. ASM sells a Metallurgy for the non-metallurgist that would be a good introduction. Most university libraries will have the full ASM handbook that includes detailed information for different grades of steel (vol 1), heat treatment and surface hardening (vol 4), testing (vols 8-12), and casting (vol 15). A reference for continuous cooling transformation diagrams will also help in designing a heat treatment process. If you want to make something stronger than most commercial steels, you'll need to get into nanotechnology and unconventional steel processing methods like powder metallurgy. You can increase the strength of steel by about 1000% by reducing the grain size from 50 micron (typical for conventional processing methods) to 100 nm (achievable through high-energy ball milling). Though you'd also need to customize the chemistry to stabilize the grain size during the necessary thermal processing, I believe zirconium works well with iron.

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:What is the role of steel coils in the supply chain?: Steel coils play a crucial role in the supply chain, particularly in the manufacturing and construction industries. These coils, which are typically made from hot-rolled steel, serve as a primary raw material for a wide range of products, including automobiles, appliances, construction materials, and various other industrial goods. The supply chain for steel coils begins with the production of raw steel, which is then processed and shaped into coils at steel mills. These coils are subsequently transported to various manufacturing facilities where they are transformed into finished products. Throughout this process, steel coils act as an intermediary product that is easily transportable, stackable, and can be easily manipulated to fit different manufacturing requirements. One of the key advantages of using steel coils in the supply chain is their strength and durability. Steel is known for its high tensile strength, which enables it to withstand significant loads and pressures. This makes steel coils ideal for applications that require robust materials, such as structural components in buildings, heavy machinery, and vehicles. Moreover, steel coils are highly customizable, allowing manufacturers to tailor the dimensions and specifications of the coils to meet their specific needs. This flexibility ensures that the supply chain can efficiently deliver steel coils that align with the requirements of different industries and projects. In terms of logistics, steel coils are typically transported in large quantities using specialized equipment such as flatbed trucks, railcars, or even ships. Efficient logistics planning is essential to ensure on-time delivery and minimize transportation costs. Additionally, proper storage and handling are crucial to prevent damage to the coils during transit and storage. Overall, steel coils play an integral role in the supply chain by serving as a versatile raw material that can be shaped and transformed into various end products. Their strength, durability, and flexibility make them a vital component in industries that rely on high-quality steel, ultimately contributing to the overall economic growth and development of numerous sectors.

Q:it seems like the hardness of Stainless steel, i saw 410c stainless stell, i saw 440c stainless steel, what does it means anyway?: It is the alloy number given by the American Iron and Steel Institute, or AISI. This is the trade organization of the U.S. steel industry, one of the oldest such organizations. 440C is also known under the UNS system as S44004 440C is a high carbon, plain chromium stainless steel. Or more specifically: 18% Cr, ~1.1% C, ~1.0% Mo, Si, and Mn 440c is mostly used in cutlery, bearings, and valve parts; because it has the best strength and hardness after basic heat treatment of any stainless steel. Relatively poor properties in other areas make it less suitable for other types of items. for example 440c becomes very brittle in sub zero temperatures. 410 is similar to 440, but it is a cheaper milder steel with less chromium and carbon, so it is less brittle, more easily worked and machined, but lacks final strength and hardness. it is often used in cheap stainless fasteners and bushings.

Q:I've heard on some 1911 forums that the slides of Armscor guns are now extruded. What is extruded steel? How is it made? Are they strong (4140carbon steel was used in the process).: Extruded steel is only the steel being run through a die when it is heated, it usually reduces the size of the grain of the steel itself, enhancing toughness. Realistically though, in a handgun, it doesn't matter if the frame is cast or forged, both types will hold up to any amount of abuse, unless you use it as a sledgehammer, and are splitting stones with it, then the forged frame would win. 4140 is more than adequate for a slide/frame. Hell, even mild steel would be adequate as long as you don't mind some dings and scratches, and again, don't use it as a sledgehammer...

Q:What are the different methods of perforating steel coils?: Various techniques are employed to perforate steel coils, each possessing unique merits and applications. 1. Mechanical Punching: One frequently employed method for perforating steel coils is mechanical punching. This involves utilizing a mechanical press, punch, and die set to puncture holes in the coil. Customization of hole size and shape is achievable by designing the punch and die set accordingly. Mechanical punching is efficient and generates consistent results, producing high-quality holes. 2. Laser Cutting: For intricate designs or complex hole patterns, laser cutting is a sought-after technique to perforate steel coils. A powerful laser beam is employed to precisely and cleanly cut through the coil, creating holes. Hole size, shape, and spacing flexibility are offered by laser cutting, which can be computer-controlled for precise and repeatable outcomes. 3. CNC Plasma Cutting: This method leverages a high-velocity plasma jet to cut through the steel coil and create perforations. CNC technology guides the plasma cutter, ensuring precise and accurate hole patterns. CNC plasma cutting is ideal for thicker steel coils and can generate larger holes compared to laser cutting. 4. Waterjet Cutting: The use of a high-pressure jet of water mixed with an abrasive substance characterizes waterjet cutting for perforating steel coils. This technique allows versatility in terms of hole dimensions, shapes, and compatibility with different materials. Waterjet cutting is renowned for its capability to produce intricate and precise perforations without causing heat-affected zones or distortion. 5. Electrical Discharge Machining (EDM): EDM is an approach that employs electrical discharges to erode the material, forming perforations in the steel coil. It involves the use of a conductive electrode and dielectric fluid to generate controlled sparks, removing material and creating holes. EDM is suitable for creating complex shapes and patterns, particularly on hard materials. The choice of method depends on various factors, including desired hole size and shape, steel coil thickness and type, required precision, and production volume. Each method has its own strengths and limitations, necessitating the selection of the most appropriate technique based on the specific requirements of the perforated steel coils.

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