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: What are the specifications for steel strips used in the production of fasteners?: The specifications for steel strips used in the production of fasteners may vary depending on the specific application and requirements. However, in general, some common specifications for these steel strips include: 1. Material: The steel used for fastener production is typically low carbon steel, also known as mild steel. This type of steel offers good strength and ductility while being cost-effective. 2. Dimensions: Steel strips for fasteners are typically supplied in coils or cut-to-length strips. The width of the strip can range from a few millimeters to several centimeters, depending on the size of the fasteners being produced. The thickness of the strip also varies based on the specific application and requirements. 3. Surface Finish: Steel strips used in fastener production often undergo surface treatments to improve their corrosion resistance and enhance their appearance. Common surface finishes include zinc plating, galvanizing, or applying a protective coating like phosphate or black oxide. 4. Tensile Strength: The tensile strength of the steel strip is an important specification as it determines the maximum load the fastener can withstand without breaking or deforming. The specific tensile strength requirement depends on the application and the type of fastener being produced. 5. Hardness: The hardness of the steel strip is a measure of its resistance to indentation or deformation. Different fasteners may require different hardness levels to ensure they can withstand the intended application without failing. 6. Composition and Chemical Properties: Steel strips used in fastener production must meet specific chemical composition requirements to ensure the desired mechanical properties. The levels of carbon, manganese, sulfur, phosphorus, and other elements are controlled to achieve the desired strength, ductility, and other performance characteristics. It is important to note that these specifications can vary based on the specific standards and regulations followed in different industries or regions. Therefore, it is always advisable to consult the relevant industry standards or the specifications provided by the manufacturer for precise details about the steel strips used in fastener production.

Q: How are steel strips used in the manufacturing of electrical components?: Due to their various properties and benefits, steel strips find common usage in the manufacturing of electrical components. Typically crafted from high-quality steel alloys, these strips are cut into desired shapes and sizes to cater to specific applications. One of the primary applications of steel strips in electrical component manufacturing involves the creation of magnetic cores. These cores are essential elements in transformers, inductors, and other electrical devices that require efficient energy transfer. The steel strips are meticulously stacked and laminated to minimize eddy currents and enhance magnetic performance. This lamination structure aids in reducing energy losses and improving the overall efficiency of the electrical component. Furthermore, steel strips often serve as a solid and stable base or support material for electrical contacts and connectors. These components necessitate a firm foundation to ensure proper electrical conductivity and secure connections. Steel strips offer excellent mechanical strength and stability, making them an ideal choice for such applications. In addition, steel strips can be employed for shielding purposes in electrical components. The interference caused by electromagnetic waves (EMI) can negatively impact the performance of sensitive electronic devices. By incorporating steel strips into the design, manufacturers can create an effective barrier against EMI, safeguarding the electrical component from external interference and ensuring its proper functioning. Moreover, steel strips are also utilized in the manufacturing of electrical springs and contacts. These components demand specific mechanical properties, including high tensile strength, resilience, and durability. Steel strips possess these attributes and can be easily molded into the desired shape, making them well-suited for applications that require repetitive motion or reliable electrical connections. In conclusion, steel strips play a crucial role in the manufacturing of electrical components. They are utilized for creating magnetic cores, providing a stable foundation for contacts and connectors, shielding against electromagnetic interference, and producing springs and contacts with desired mechanical properties. With their versatility and reliability, steel strips significantly contribute to the overall performance and efficiency of electrical devices.

Q: What are the different welding techniques for steel strips?: Some of the different welding techniques for steel strips include butt welding, lap welding, and spot welding. Butt welding involves joining the ends of two strips together, while lap welding involves overlapping the strips and welding them along the overlapping area. Spot welding uses electrical current to join the strips at specific points, creating a strong bond. These techniques can be used depending on the specific application and desired outcome for the steel strips.

Q: How are steel strips protected against chemicals in industrial environments?: Steel strips are protected against chemicals in industrial environments through the application of protective coatings or finishes. These coatings are designed to create a barrier between the steel surface and the chemicals, preventing direct contact and potential corrosion. Additionally, certain types of stainless steel or alloys with high resistance to chemical reactions may be used to enhance the overall durability and protection of the steel strips in such environments.

Q: Can cold rolled strip be plated with white zinc?: Slight floating rust will not affect, serious rust will affect the quality of the electroplating.

Q: What are the film coating options for steel strips?: There are several film coating options available for steel strips, depending on the specific requirements and desired properties. Some common film coating options for steel strips include: 1. Zinc Coating: This is one of the most popular film coatings for steel strips, known as galvanizing. Zinc provides excellent corrosion resistance and protects the steel from rusting. It can be applied through hot-dip galvanizing or electroplating methods. 2. Polymer Coating: Polymer coatings, such as polyurethane or epoxy, are often used to enhance the corrosion resistance and durability of steel strips. These coatings provide a protective barrier against moisture, chemicals, and abrasion. 3. Organic Coatings: Organic coatings, such as paints or lacquers, are applied on steel strips to provide an aesthetically pleasing appearance, as well as protection against corrosion and weathering. These coatings can be customized to meet specific color or gloss requirements. 4. Phosphate Coating: Phosphate coatings are commonly used as a pre-treatment for steel strips before applying other coatings. They provide enhanced adhesion and corrosion resistance for subsequent coatings, such as paints or polymer films. 5. Chromate Conversion Coating: Chromate conversion coatings, also known as passivation coatings, are applied to steel strips to improve their corrosion resistance. These coatings form a thin film on the surface, which acts as a barrier against oxidation and chemical attack. 6. Tin Coating: Tin coatings are often applied to steel strips for their aesthetic appeal and improved solderability. They provide a bright and reflective surface and protect the steel from corrosion. 7. Aluminum Coating: Aluminum coatings, such as aluminum-zinc alloy or pure aluminum, are used to provide excellent corrosion resistance and heat reflectivity to steel strips. These coatings are commonly used in construction and automotive applications. It is important to consider the specific requirements, such as desired corrosion resistance, appearance, and application conditions, when selecting the appropriate film coating for steel strips. Consulting with a professional coating supplier or manufacturer can help in determining the most suitable option for a particular application.

Q: Are steel strips suitable for the manufacturing of oil and gas pipelines?: Yes, steel strips are suitable for the manufacturing of oil and gas pipelines. Steel has excellent mechanical properties and is known for its high strength, durability, and resistance to corrosion, making it an ideal material for pipelines that need to withstand high pressure and harsh environments. Additionally, steel strips can be easily formed and welded together, allowing for efficient manufacturing and installation of pipelines.

Q: How are steel strips used in the manufacturing of air conditioning systems?: Steel strips are commonly used in the manufacturing of air conditioning systems for various purposes, such as forming the framework or casing of the units, creating channels for the flow of refrigerant, and providing structural support to important components. They are often shaped, cut, and welded to specific dimensions to fit the design requirements of the system, ensuring durability and efficient operation of the air conditioning units.

Q: What is the resistance to corrosion of a stainless steel strip?: The resistance to corrosion of a stainless steel strip is generally high. Stainless steel contains a minimum of 10.5% chromium, which forms a protective layer on the surface known as a passive film. This passive film prevents the metal beneath from reacting with its environment, making stainless steel highly resistant to corrosion. Additionally, stainless steel may contain other alloying elements such as nickel and molybdenum, which further enhance its corrosion resistance. However, the resistance to corrosion can vary depending on the specific grade of stainless steel and the environmental conditions it is exposed to. In highly corrosive environments, such as in the presence of acids or chlorides, certain grades of stainless steel may be more suitable than others. Overall, stainless steel is known for its excellent resistance to corrosion, making it a popular choice for various applications in industries such as construction, automotive, and food processing.

Q: What are the different types of steel strip coils?: There are several different types of steel strip coils available, each with its own unique properties and applications. Some of the most common types include: 1. Hot-rolled steel strip coils: These coils are produced through a hot rolling process, where the steel is heated above its recrystallization temperature and then passed through a series of rollers to achieve the desired thickness. Hot-rolled steel strip coils are commonly used in construction, automotive, and general engineering applications. 2. Cold-rolled steel strip coils: In contrast to hot-rolled coils, cold-rolled steel strip coils are produced by rolling the steel at room temperature. This process results in a smoother surface finish and tighter dimensional tolerances. Cold-rolled steel strip coils are often used in applications that require high precision and superior surface quality, such as appliances, electronic components, and automotive parts. 3. Galvanized steel strip coils: Galvanization is a process where a layer of zinc is applied to the surface of the steel to protect it from corrosion. Galvanized steel strip coils are commonly used in outdoor applications or environments exposed to moisture, such as roofing, fencing, and electrical conduits. 4. Stainless steel strip coils: Stainless steel is an alloy that contains a minimum of 10.5% chromium, which provides excellent corrosion resistance. Stainless steel strip coils are highly versatile and are used in various industries, including food processing, chemical, and medical equipment manufacturing. They are available in different grades, each with specific properties suited for different applications. 5. Electrical steel strip coils: Electrical steel, also known as silicon steel or transformer steel, is specifically designed for use in electrical applications. It has low electrical conductivity and high magnetic permeability, making it ideal for manufacturing transformers, motors, and generators. These are just a few examples of the different types of steel strip coils available. Each type has its own unique properties that make it suitable for specific applications, and the choice of the appropriate type depends on factors such as the desired strength, corrosion resistance, surface finish, and electrical conductivity.

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