hot rolled steel strip

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Product Description:

Spring Steel:

Spring steel is divided into two types, one is alloy spring steel, and other one is carbon spring steel.

Alloy spring steel is a type that is used for manufacturing springs and other elastic parts. Spring steel should have high ratio of yield strength and tensile strength and elastic limit to make sure that the springs obtain enough power of elastic deformation and can bear much load.

Types of alloy spring steel: Si-Mn spring steel, Si-Cr spring steel, Cr-Mn Spring steel, Cr-V spring steel and so on.

Specification of Spring Strip Steel:

-Material: 30W4Cr2VA

-Standard: GB/T 1222-2007

-Type: Spring Steel

Chemical Composition:

C	Si	Mn	S
0.26~0.34	0.17~0.37	≤0.40	≤0.030
P	Cr	Ni	Cu
≤0.030	2.00~2.50	≤0.35	≤0.25
V	W
0.50~0.80	4.00~4.50

Mechanical Properties:

-Yield Strength σs (MPa): ≥1470 (150)

-Elongation δ10(%):≥7

-Hardness:

1, Hot rolled + Heat treatment, ≤321HB

2, Cold drawn + Heat treatment: ≤321HB

-Impact Power: ≥40

Norm of heat treatment:

1, Quenching: 1050℃~1100℃.

2, Cooled by oil.

3, Tempering: 600℃±50℃.

Usage/Applications of Spring Strip Steel:

-Due to the elements W, Cr and V, this type of spring steel obtain pretty high hardenability and nice mechanical properties under room temperature and high temperature. The tempering stability and hot workability are good.

-Being used under the state of quenching and high temperature tempering. It’s usually used as heat-resisting springs with working temperature below 500℃, like main secure valve spring of furnace and turbine steam seal leaf springs.

Packaging & Delivery of Spring Strip Steel:

-Packing Detail: The products will be well packed.

-Marks: there are two types of marks.

1, Tag marks. To show customers the specifications of products, company name and logo and other information required by customers.

2, Color marks. It’s easy for customers to distinguish them from other products at destination port.

-Delivery Detail: 30~45 working days after receive buyer’s T.T. or L/C.

Transportation:

1, The products can be delivered by bulk vessel or by container.

2, The maximum quantity of loading of container is 25 tons.

3, The products usually are transported to the nearest port from the production place.

Payment:

-Theoretical weight/Actual weight.

-FOB, CFR or CIF.

-Terms of payment: T.T. or L/C at sight.

Photos of Spring Strip Steel:

Spring Strip Steel

Q: Are steel strips used in the production of storage tanks?: Steel strips are a commonly utilized component in the manufacturing of storage tanks. The utilization of steel in storage tanks is highly favored owing to its exceptional strength, durability, and ability to resist corrosion. To construct the walls, roofs, and for reinforcement purposes, steel strips are frequently employed. The strips are typically shaped by rolling or forming methods and subsequently welded or bolted together to establish a tightly sealed tank. Moreover, to enhance their resistance to rust and other forms of corrosion, steel strips can be coated or treated with protective coatings. Consequently, the incorporation of steel strips in the production process of storage tanks guarantees their robustness and longevity, rendering them suitable for the storage of a wide range of liquids and gases.

Q: How are steel strips processed for UV resistance?: Steel strips can be processed for UV resistance through various methods. One common method is the application of a UV-resistant coating or paint. This coating acts as a protective barrier, preventing the harmful UV rays from penetrating the steel surface and causing damage. The coating is typically applied through a process called hot-dip galvanizing, where the steel is dipped into a bath of molten zinc. This not only provides UV resistance but also enhances the overall corrosion resistance of the steel. Another method is the use of UV stabilizers or additives during the manufacturing process of the steel strips. These additives are mixed with the raw materials used to produce the steel, which makes the final product more resistant to UV radiation. These additives work by absorbing or reflecting the UV rays, preventing them from degrading the steel. This method is particularly effective for steel strips that will be exposed to prolonged periods of direct sunlight. Additionally, the steel strips can be treated with a clear protective film that offers UV resistance. This film is applied to the surface of the steel and acts as a shield, blocking the UV rays from reaching the steel and causing any damage. This method is often used for steel strips that require a high level of UV protection, such as those used in outdoor applications or in the construction industry. Overall, the process of making steel strips UV resistant involves the application of specialized coatings, the addition of UV stabilizers, or the use of protective films. These methods help to enhance the longevity and durability of the steel strips, ensuring they can withstand exposure to UV radiation without significant degradation.

Q: What are the common thickness variations in steel strips?: The thickness of steel strips can vary depending on the industry and application. Generally, steel strips are manufactured with a tolerance range for thickness to account for variations during production. The most common way to measure thickness variations in steel strips is by gauge or thickness range. Gauge refers to the thickness of a steel strip, with lower numbers indicating thicker strips and higher numbers indicating thinner strips. For instance, in the automotive industry, steel strips used for structural components may have a tolerance of ±0.005 inches (0.13 mm) or less. This ensures that the strips meet the required strength and performance specifications while maintaining consistency in production. In other industries like construction or manufacturing, steel strips may have slightly larger thickness variations depending on the application. These variations can range from ±0.010 inches (0.25 mm) to ±0.020 inches (0.51 mm) or more, depending on the project's specific requirements. It's important to note that these thickness variations are carefully controlled and specified by industry standards and regulations. Manufacturers utilize advanced technology and quality control measures to ensure that steel strips are produced within the required tolerance range to meet desired specifications. Overall, while there may be slight thickness variations, steel strips are typically controlled within specific tolerance ranges to ensure consistency, quality, and performance in various applications.

Q: What are the common maintenance practices for steel strips?: To maintain steel strips, it is necessary to regularly clean, lubricate, and inspect them. Cleaning is crucial as it eliminates accumulated dirt, debris, and contaminants from the surface. A mild detergent or specialized cleaner designed for steel surfaces can be used for this purpose. It is important to avoid abrasive cleaners or tools that could scratch or damage the steel. Lubrication is another essential maintenance practice, especially for steel strips used in moving parts or machinery. Applying an appropriate lubricant reduces friction and wear, promoting smooth operation and extending the lifespan of the strips. The choice of lubricant depends on the specific application and equipment requirements. Regular inspection is vital to identify any signs of damage or wear on the steel strips. This includes checking for cracks, dents, or any abnormalities that could affect their performance or structural integrity. Promptly addressing any issues prevents further damage and potential safety hazards. Proper storage of steel strips is also crucial to prevent rust or corrosion. They should be kept in a dry and well-ventilated area, away from moisture or chemicals that could cause damage. Applying a protective coating or using rust inhibitors can further aid in corrosion prevention. By adhering to these common maintenance practices, steel strips can be kept in optimal condition, ensuring their longevity and optimal performance.

Q: How are steel strips marked for identification?: Steel strips are typically marked for identification using a variety of methods. One common method is through the use of printed labels or tags that contain relevant information such as the grade, thickness, width, and length of the steel strip. These labels are usually attached to the strip itself or to the packaging it is stored in. Another method is through the use of paint or ink markings directly on the surface of the strip. These markings can include alphanumeric codes or symbols that indicate specific characteristics or specifications of the steel strip. Additionally, some steel strips may be marked using laser engraving or etching techniques, which provide a permanent and precise identification method. These markings can be customized to include any necessary information required for identification purposes. Overall, the marking of steel strips for identification is crucial in ensuring proper traceability and facilitating efficient storage, handling, and usage of the strips.

Q: Can steel strips be used in the production of power transmission components?: Yes, steel strips can be used in the production of power transmission components. Steel strips are often used in the manufacturing of various power transmission components such as gears, shafts, couplings, and sprockets. Steel offers excellent strength, durability, and resistance to wear and tear, making it a suitable material for power transmission applications. The steel strips can be processed and formed into the desired shape and size, allowing for the production of precise and efficient power transmission components. Additionally, steel strips can be heat treated and surface treated to enhance their mechanical properties and improve their performance in power transmission systems. Overall, using steel strips in the production of power transmission components ensures reliability, longevity, and optimal performance in various industrial applications.

Q: How are steel strips coated with a passivation layer?: Passivation is a process that involves coating steel strips with a layer to reduce reactivity and enhance corrosion resistance. Typically, steel strips are immersed in an acidic solution, usually a mixture of nitric acid and water, to achieve passivation. To begin the passivation process, the steel strips are thoroughly cleaned to remove any contaminants like dirt, oil, or grease. This step is crucial as impurities can interfere with the effectiveness of passivation. Once cleaned, the strips are put into the passivation bath where a chemical reaction occurs between the acid solution and the steel. This reaction forms a thin oxide layer on the surface of the strips, acting as a barrier against corrosive elements like oxygen and moisture that can cause rust and corrosion. During passivation, the acid solution also removes any existing impurities on the steel surface, like iron oxide. This helps improve the overall corrosion resistance of the strips. After a specified passivation time, the steel strips are rinsed thoroughly to remove any remaining acid solution. Then, they are dried completely to eliminate any moisture. In some cases, a post-passivation treatment may be applied to further enhance corrosion resistance. This can involve applying a thin layer of oil or a chemical sealant to the passivated surface. Overall, the passivation process adds a protective layer to steel strips, increasing their resistance to corrosion and extending their lifespan. This is especially important in applications where the strips will be exposed to harsh environments or corrosive substances.

Q: How are steel strips used in the manufacturing of transmission towers?: Steel strips are used in the manufacturing of transmission towers as they are shaped and welded together to form the structural components of the tower, providing strength, stability, and support for the transmission lines.

Q: What is the elongation percentage of steel strips?: The elongation percentage of steel strips refers to the amount by which a steel strip can stretch or deform before it reaches its breaking point. It is a measure of the ductility or the ability of the steel strip to withstand deformation without fracturing. The elongation percentage is typically expressed as a percentage of the original length of the strip. The elongation percentage of steel strips can vary depending on various factors such as the composition of the steel, the manufacturing process, and any heat treatments applied. Generally, steel strips have a relatively high elongation percentage, which makes them suitable for applications that require flexibility and the ability to withstand bending or shaping without breaking. In the case of mild steel, which is commonly used in strip form, the elongation percentage can range from 20% to 40% or even higher. This means that a mild steel strip with an original length of 100mm can stretch up to 40mm or more before it breaks. However, it is important to note that the elongation percentage can be influenced by external factors such as temperature, strain rate, and the presence of impurities or defects in the steel. The elongation percentage of steel strips is an important mechanical property that is considered in the design and selection of materials for various applications. It is particularly relevant in industries such as automotive, construction, and manufacturing where the ability of a material to deform without failure is crucial.

Q: Can steel strips be used for fencing?: Absolutely, fencing can utilize steel strips. Steel strips are widely employed in fencing applications because of their durability, strength, and capacity to endure harsh weather conditions. They offer a superior level of security and can be employed for different types of fencing, including chain-link fences, barbed wire fences, and even decorative fences. Steel strips are adaptable, straightforward to install, and demand minimal maintenance, rendering them a favored option for residential and commercial fencing ventures alike.

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