High grade hot rolled narrow strip steel
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 300 m.t.
- Supply Capability:
- 5000 m.t./month
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Definition
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Strip steel
The strip generally supplied in rolls, has the advantages of high size precision,good surface quality, easy processing, material saving etc.. With the same steel plate, strip by strip material is divided into ordinary and high quality strip steel two categories; according to the manufacturing method of hot rolled strip,cold rolled strip two.
2 scope of application
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Steel is widely used in the production of welded steel pipe as blank, cold-formed steel, manufacturing bicycle frame, wheels, clamps, washer, spring film,saw blade, metal products and blade etc..
Cold-formed steel
In broadband steel
The 3 process
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The production process of cold rolled strip steel is generally: picklinglubrication, rolling, process, anneal and flat, cutting, packaging.
Cold rolled strip steel pickling rolling process: -- -- -- -- the size of synchronousrolling annealing lubricating antirust oil length -- -- -- flat polished package
Hot strip rolling heating furnace dephosphorization machine: -- -- -- --phosphorus removal roughing mill machine finishing mill surface quality inspection instrument -- -- -- -- layer cold coiler bundling machine -- number spraying machine -- volume base slab
The production process of hot rolling strip steel: first in the heating furnace of increasing the temperature to the desired temperature of rolling, and then oxidized to tin machine generated on the slab roller into the roughingphosphorus removal treatment, then enter the width and thickness of striproughing rolling unit rolling, iron oxide by roller conveying to phosphorus on the strip surface finishing machine produce processing, enter the width and thickness of strip finishing rolling unit for more precision rolling, strip by rollerby layer on the surface temperature of cold roll strictly control take before and after, enters the coiler for steel coil finally bundling, spraying number into thevolume storage packaging.
4 Market
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In May 20th Shengfang steel prices down. According to the data Chineseindustry insight network show: Hebei forward, Sheng Bao, Bazhou Xinya, the new crown made 2.5* (232-355) steel price is 3400 yuan (ton price, the same below), down 50 yuan more than last Friday.
Influenced by Tangshan last week, small narrow billet prices, Saturday (18 days) in Shengfang area with steel mills have lowered the ex factory price. The price decline, turnover performance in general, opened today manufacturersoffer temporary stability. In addition, the Tangshan area steel prices also have lowered, 355mm strip retail pricing million in 3320-3350, with the local price difference between 50-80 yuan, relatively reasonable.
Today Tangshan small narrow band market prices show small to rise, and the futures, electronic disk also rise, but the rise of strength are insufficient. At present, the overall trend of steel spot market downturn, but the steel market is restricted by the supply pressure, the market price is the emergence of the continuing rise in prices. And will soon enter the consumer off-season, terminaldemand release rate has slowed down, expected short-term local steel marketprice is still dominated by the shock consolidation.
5 Classification
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Hot rolled strip
1, hot rolled ordinary carbon structural steel (GB3524-83)
Strip steel
Hot rolled plain carbon steel with ordinary carbon structural steel as material,made of 1.80-6.00mm hot rolled strip thickness, width of 50-1200mm.
(1) the main purposes
Mainly used for cold rolling billet, cold-formed steel billet, welded steel pipebillet and bicycle, hardware products manufacturing.
(2) grade and chemical composition of materials
Standards and grades
National standard
Quite foreign standard
Function and use
Material categories
The implementation of standards
Grade
Standard No.
Grade
Suitable for manufacturing of cold forming parts
Low carbon steel coil
Q/BQB302
SPHC
JISG3131
SPHC
SPHD
SPHD
SPHE
SPHE
SAE1006/SAE1008
SAE1006/SAE1008
XG180IF/200IF
XG180IF/200IF
Steel for general structure
GB/T912-1989
Q195
JISG3101
SS330
For general construction of buildings, bridges, ships, vehicles, etc.
Q235B
SS400
SS400
SS490
ASTMA36
SS540
(3) the mechanical properties
The nominal thickness
The yield strength (Mpa)
Tensile strength (Mpa)
Elongation of A50mm%
The 180 degree bend test
>1.5-2.5
Less than or equal to 290
More than 310
More than 38
D=0a
>2.5-3.0
Less than or equal to 290
More than 300
More than 38
D=0a
>3.0-4.0
Less than or equal to 290
More than 300
More than 40
D=1/2a
Use of hot-rolled steel 2, bicycle (GB3645-89)
Bicycle for hot rolled wide strip steel in carbon steel and low alloy steel asmaterial, made of 1.8-8.0mm strip steel thickness after hot rolling, the strip width can reach 1300mm.
(1) the main uses special for bicycle manufacturing materials.
(2) grade and chemical composition of materials
(3) the mechanical properties
(4) strip (board) size
The thickness of the steel plate strip thickness 1.8-6.0mm, 7, 8.0mm.
Strip (board) width: rimming steel is less than or equal to 1300mm (a=2.0-6.0)
Killed steel is less than or equal to 1250mm (a = 3)
Less than or equal to 1300mm (a = 3)
The length of the plate, steel coil diameter 760mm, 4-6m plate.
Hot rolled strip with 3, bicycle (GB3647-89)
(1) the main purposes
Bicycle designed for the manufacture of hot rolled strip of bicycle and the chain, also can be used for cold rolled and welded pipe blank blank.
(2) grade and chemical composition of materials
(3) the mechanical properties
(4) the specification of strip
Bicycles are generally used for hot rolled strip steel strip thickness of 1.8-8.0mm, width of 60-250mm.
Hot rolled strip with 4, pressure vessel (GB5681-85)
(1) the main purposes
Used in the manufacture of low pressure vessel.
(2) grade and chemical composition of materials
(3) the mechanical properties
(4) the specification of strip and production unit
Pressure vessel is generally used for hot rolled strip steel strip thickness of 4mm, width of 80mm double length, length of not less than 70m (volume).
Cold rolling of strip
(1) the main purposes
Cold-rolled carbon steel for the manufacture of bicycles, sewing machines,agricultural machinery and other accessories and hardware products.
(2) grade and chemical composition of materials
Grade
Supply standard
Supply size
Use
SPCC
Q195
Q235-B
GB/T912
GB/T3274
Width
Mm
Thickness
Mm
Widely used in engineering machinery, transportation machinery, construction machinery, hoisting machinery。
- Q: What are the tolerances for dimensional accuracy of steel strips?
- The tolerances for dimensional accuracy of steel strips can vary depending on the specific application and industry standards. However, common tolerances for dimensional accuracy range from +/- 0.005 inches to +/- 0.015 inches, with tighter tolerances often required for precision applications such as automotive or aerospace industries.
- Q: What are the different methods for leveling steel strips?
- There are various techniques available for leveling steel strips, which rely on specific requirements and the desired outcome. 1. Roller Leveling: To bend and flatten the material, the steel strip is passed through a series of rollers that apply pressure. The levelness can be adjusted by modifying the rollers, making this method ideal for wide and thin steel strips. 2. Stretch Leveling: This method involves stretching the steel strip beyond its yield point to eliminate internal stresses and enhance flatness. The strip is fed through powered rollers that stretch it in both directions, effectively straightening and leveling the material. 3. Tension Leveling: Similar to stretch leveling, tension leveling employs a series of rollers to stretch the steel strip. However, in this technique, the strip is pulled to a specific tension rather than surpassing its yield point. It is commonly used for thicker steel strips and offers excellent flatness control. 4. Temper Rolling: After annealing or heat treatment, the steel strip is subjected to a controlled amount of cold rolling. This process reduces thickness and elongates the strip, improving its flatness and overall quality. 5. Precision Leveling: Precision leveling employs hydraulic or mechanical presses to apply pressure on specific areas of the steel strip. This advanced method is highly effective in correcting localized defects or unevenness in the material. 6. Laser Leveling: Laser leveling utilizes a laser beam to measure the surface profile of the steel strip. Any irregularities are then removed using heat or mechanical force. This technique is known for its high precision and is commonly used for leveling thin and sensitive steel strips. The choice of leveling technique depends on factors such as strip thickness, material properties, desired flatness, and production requirements. Each method has its own advantages and limitations.
- Q: Are steel strips commonly used in the manufacturing of machinery?
- Yes, steel strips are commonly used in the manufacturing of machinery.
- Q: What are the common edge defects in steel strips?
- There are several common edge defects that can occur in steel strips during the manufacturing process. These defects can have negative effects on the quality and performance of the steel strips. One common edge defect is known as edge wave. This defect occurs when the edges of the steel strip have a wavy or rippled appearance. It is usually caused by uneven tension or uneven rolling during the manufacturing process. Edge wave can lead to problems during further processing or when the steel strip is being formed into a final product. Another common edge defect is known as edge cracks. These are small cracks that can appear along the edges of the steel strip. Edge cracks can be caused by excessive stress or strain during the manufacturing process, or by improper cooling or heat treatment. These cracks can weaken the steel strip and compromise its structural integrity. Edge burrs are yet another common defect in steel strips. Burrs are unwanted projections or rough edges that can form along the edges of the strip. They can be caused by misalignment of the rolling equipment or inadequate lubrication during the rolling process. Edge burrs can interfere with subsequent processing steps, cause damage to machinery, or lead to safety hazards. Slitting burrs are similar to edge burrs but occur specifically during the slitting process. Slitting burrs are small projections or rough edges that form along the edges of the steel strip when it is being slit into narrower widths. These burrs can be caused by dull slitting blades or improper adjustment of the slitting equipment. Slitting burrs need to be removed before the steel strip can be used in further manufacturing processes. Lastly, edge rust is a common defect that can occur in steel strips. It is the formation of rust along the edges of the strip, usually caused by exposure to moisture or improper storage conditions. Edge rust can reduce the corrosion resistance of the steel strip and affect its overall quality. In conclusion, some common edge defects in steel strips include edge wave, edge cracks, edge burrs, slitting burrs, and edge rust. These defects can impact the performance, structural integrity, and overall quality of the steel strips, so it is important for manufacturers to identify and address these issues during the production process.
- Q: How are steel strip coils formed and wound?
- Steel strip coils are formed and wound through a process called hot rolling. In this process, steel slabs are heated and passed through a series of rolling mills to reduce their thickness and shape them into strips. These strips are then wound tightly around a mandrel to create a coil. The winding process ensures that the strips are tightly packed and secured, allowing for efficient storage, transportation, and further processing of the steel coils.
- Q: How do steel strips contribute to cost savings in production?
- Steel strips contribute to cost savings in production in several ways. Firstly, steel strips are highly versatile and can be easily customized and shaped to meet specific production requirements. This eliminates the need for additional processing steps and reduces material waste, resulting in significant cost savings. Secondly, steel strips offer excellent strength and durability, allowing for longer service life and reduced maintenance costs. Additionally, steel strips have a high recycling rate, which not only reduces the environmental impact but also lowers raw material expenses. Overall, the use of steel strips in production helps optimize efficiency, reduce waste, and ultimately drive down costs.
- Q: What is the role of steel strips in the oil and gas industry?
- Steel strips play a crucial role in the oil and gas industry, primarily in the construction and maintenance of pipelines. These strips, typically made of high-quality steel, are used to form the core structure of pipelines, ensuring their strength, durability, and ability to withstand harsh operating conditions. One significant function of steel strips in the industry is to provide structural integrity to the pipelines. The strips are rolled into cylindrical shapes and welded together to create the pipeline's main body. This helps in transporting oil and gas over long distances, both onshore and offshore. The robust nature of steel makes it ideal for withstanding the high pressure and extreme temperature variations that pipelines are exposed to. Another vital role of steel strips is to protect the pipelines from corrosion. The oil and gas industry operates in diverse environments, which often include corrosive elements such as saltwater, chemicals, and gases. Steel strips are coated with anti-corrosion materials, such as epoxy or polyethylene, to create a protective layer that prevents rust and degradation. This coating also helps in reducing friction and improving the flow of oil and gas through the pipelines. Steel strips are also used in the fabrication of various equipment and components used in the oil and gas industry, such as storage tanks, drilling rigs, and offshore platforms. These equipment require high-strength steel strips to ensure stability, safety, and longevity, as they are subjected to heavy loads, extreme weather conditions, and harsh operational environments. In summary, steel strips are indispensable in the oil and gas industry due to their ability to provide structural integrity, corrosion resistance, and durability. By fulfilling these roles, steel strips contribute significantly to the safe and efficient transportation of oil and gas, as well as the construction of essential industry infrastructure.
- Q: What are the different methods for removing coatings from steel strips?
- There are several methods available for removing coatings from steel strips, each with its own advantages and disadvantages. Some common methods include mechanical, chemical, thermal, and abrasive methods. Mechanical methods involve physically scraping or peeling off the coating from the steel strip. This can be done using tools such as scrapers, chisels, or brushes. While this method may be effective for thin or loose coatings, it may not be suitable for thicker or tougher coatings. Chemical methods use chemical agents to dissolve or loosen the coating from the steel strip. These chemicals can be applied through immersion, brushing, or spraying. The choice of chemical will depend on the type of coating being removed. However, care must be taken to ensure that the chemicals used do not damage the steel strip or pose any health risks. Thermal methods involve using heat to burn off or melt the coating from the steel strip. This can be done through methods such as flame or infrared heating. Thermal methods are effective for coatings that can be easily melted or burned, but may not be suitable for coatings that are more resistant to heat. Abrasive methods involve using abrasive materials, such as sandpaper, blasting media, or wire brushes, to physically remove the coating from the steel strip. This method is effective for tougher coatings and can be used to achieve a smooth and clean surface. However, it may be time-consuming and labor-intensive. In some cases, a combination of these methods may be used to remove coatings from steel strips. It is important to consider factors such as the type and thickness of the coating, the condition of the steel strip, and the desired end result when choosing the appropriate method for coating removal. Additionally, safety precautions should always be followed to protect the workers and the environment from any potential hazards associated with the chosen method.
- Q: How do steel strips compare to galvanized steel strips?
- Steel strips and galvanized steel strips have some key differences. Steel strips are made from plain carbon steel and are typically used in various industrial applications. They are strong and durable, but they are not protected against corrosion. On the other hand, galvanized steel strips are coated with a layer of zinc, which provides excellent corrosion resistance. This zinc coating acts as a sacrificial layer, protecting the underlying steel from rust and other forms of corrosion. Therefore, galvanized steel strips are highly resistant to rust and have a longer lifespan compared to regular steel strips.
- Q: Can steel strips be used for making springs in automotive suspension systems?
- Yes, steel strips can be used for making springs in automotive suspension systems. Steel is a commonly used material for springs due to its strength, durability, and ability to withstand heavy loads. Steel strips can be manufactured into various types of springs, including coil springs and leaf springs, which are commonly used in automotive suspension systems. These springs help absorb shocks and vibrations, providing a smooth and stable ride for the vehicle. Steel strips can be heat-treated and shaped into the desired form to meet the specific requirements of the suspension system, ensuring optimal performance and longevity. Moreover, steel strips are readily available, cost-effective, and widely used in the automotive industry, making them an ideal choice for making springs in automotive suspension systems.
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High grade hot rolled narrow strip steel
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 300 m.t.
- Supply Capability:
- 5000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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