Flat Steel Bar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Supply Capability:: -

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Product Description:

Spring Steel can be divided into two types. One is carbon spring steel, and other one is alloy spring steel.

Alloy spring steel is based on carbon spring steel, by adding one or more alloying elements to improve the mechanical properties, hardenability and other properties to meet the requirement for manufacturing all kinds of spring steel.

Specification of Spring Steel:

-Material: 70Si2CrA

-Production: Hot rolled or cold rolled

-Standard: GB/T·5218-1999

-Type: Spring Steel

-Alloy or no: Alloy

Chemical Composition:

C	Mn	Si	Cr
0.65~0.75	0.40~0.60	1.40~1.70	0.20~0.40
S	P	Ni
≤0.030	≤0.030	≤0.030

Mechanical Properties:

-Annealing Condition:

1, Tensile Strength: σb/MPa：≤835

2, Elongation: δ/%：≥8

-Quencher condition:

1, Tensile strength: σb/MPa：785~1175

2, Elongation: -

Usage/Applications of Spring Steel:

For manufacturing all kinds of flat spring or round spring with small sections, clockwork spring,

Packaging & Delivery of Spring Steel:

-Packing Detail: The products can be packed in bundles by steel wires.

-Marks:

1, Tag marks: the tag marks will be tied up to each bundle of the products. The information is usually including supplier’s logo and name, product name, made in China, products’ specifications, the painted color and other information requested by customers.

2, Color marks: we will paint both ends of the bundles of these products to make sure that they are more evident. It’s will be more convenient for the customers to distinguish them at the destination port.

-Delivery Detail:

1, Delivery time: 30~45 working days after receive buyer’s T.T. or L/C.

2, Delivery status should be written in the contract. (Heat treatment or no)

Payment:

-Invoicing on theoretical weight or actual weight as customer’s request.

-FOB, CFR or CIF.

-Regular terms of payment:

1, 30% payment in advance, the remaining balance (70% payment) against the copy of B/L. 100% payment before shipment.

2, 30% payment in advance, the remaining balance (70% L/C) against the copy of B/L. 100% payment before shipment.

3, Negotiable.

Q:What are the different shapes available for steel flat bars?: There are several different shapes available for steel flat bars. The most common shape is the rectangular flat bar, which has a straight, flat surface and sharp edges. This shape is often used for structural applications, such as building frames and supports. Another shape is the square flat bar, which has equal width and thickness on all sides, forming a square shape. This shape is commonly used for ornamental purposes, such as decorative trim or fencing. Additionally, there are also round-edged flat bars available, which have rounded corners instead of sharp edges. This shape is often preferred for applications where safety is a concern, as the rounded edges reduce the risk of injury or damage. Some manufacturers also offer special shapes, such as tapered flat bars or custom profiles, which are designed to meet specific requirements or to provide unique functionality for certain applications. Overall, the available shapes for steel flat bars provide a range of options to suit different needs and preferences, allowing for versatility and customization in various industries and projects.

Q:Do lightning protection, lead out of the galvanized round steel, flat steel needs to be inspected?: The corrosion resistance of cold galvanizing is not as good as that of hot-dip galvanizing. It is used as lightning protection and grounding material. It is corroded quickly, and the grounding resistance is raised rapidly. It exceeds the required resistance.

Q:What are the different methods of polishing steel flat bars?: There are several different methods that can be used to polish steel flat bars, depending on the desired finish and level of polish required. One common method is by using sandpaper or abrasive pads. This involves using progressively finer grits of sandpaper or abrasive pads to remove any imperfections or roughness on the surface of the steel. Starting with a coarser grit, such as 80 or 120, and gradually moving to finer grits, such as 400 or 600, will help achieve a smooth and polished finish. This method can be done by hand or with the use of a power tool, such as a sander or grinder. Another method is by using polishing compounds. Polishing compounds are abrasive substances that are applied to the steel surface and then buffed with a cloth or polishing wheel. These compounds help to remove scratches, oxidation, and other imperfections, leaving a shiny and polished surface. Different polishing compounds are available, ranging from coarse to fine, depending on the level of polishing required. Electropolishing is another method that can be used to polish steel flat bars. This is an electrochemical process that removes a thin layer of material from the surface of the steel, resulting in a smooth and polished finish. The steel flat bar is submerged in an electrolyte solution and an electric current is applied, which causes the material to dissolve and the surface to become polished. Electropolishing is often used for stainless steel flat bars and can be an effective method for achieving a high-quality and uniform finish. In addition to these methods, there are also mechanical polishing techniques that can be used, such as using a polishing wheel or a buffing machine. These machines have rotating wheels or pads that are coated with abrasive compounds and are used to buff and polish the steel surface. The speed and pressure applied can be adjusted to achieve the desired level of polish. Overall, the choice of method for polishing steel flat bars depends on factors such as the desired finish, the level of polish required, and the equipment and materials available. It is important to consider these factors and select the most appropriate method to achieve the desired results.

Q:Are steel flat bars easy to work with?: Yes, steel flat bars are generally easy to work with. They can be cut, bent, drilled, and welded easily, making them suitable for various construction and DIY projects.

Q:What are the different storage and handling requirements for steel flat bars?: Different types of steel and environmental conditions can lead to varying storage and handling requirements for steel flat bars. However, adhering to some common guidelines can guarantee their proper storage and handling. 1. Storage: To prevent corrosion caused by moisture and humidity, steel flat bars should be kept in a dry and well-ventilated area. It is important to avoid direct contact with the ground to prevent potential damage. Stacking the bars on racks or pallets is recommended to maintain their shape and prevent deformation. 2. Handling: Careful handling is necessary to prevent bending, twisting, or scratching of steel flat bars. Employees should use appropriate lifting equipment, such as forklifts or cranes, for moving and transporting the bars. Properly securing the bars during transportation is crucial to avoid accidents or damage. 3. Protection: Shielding steel flat bars from moisture, chemicals, and extreme temperatures is essential. Applying a suitable protective coating, such as oil or paint, can prevent rust and corrosion. Additionally, storing the bars away from materials that could cause damage, such as acids or alkaline substances, is important. 4. Inspection: Regularly inspecting steel flat bars is crucial to identify any signs of corrosion, deformation, or defects. Damaged or compromised bars should be promptly removed from storage and either repaired or replaced, depending on their condition. 5. Documentation: Maintaining proper documentation of the storage and handling of steel flat bars is vital. This includes recording the receipt date, quantity, and relevant details like the supplier or manufacturer. Such documentation serves quality control purposes and can be useful in case of disputes or warranty claims. By adhering to these storage and handling requirements, steel flat bars can be preserved in excellent condition, ensuring their durability and suitability for various applications.

Q:Are steel flat bars suitable for architectural applications?: Yes, steel flat bars are suitable for architectural applications. They offer excellent strength, durability, and versatility, making them ideal for various architectural designs. Additionally, steel flat bars can be easily customized and fabricated to meet specific architectural requirements, making them a popular choice among architects and designers.

Q:How large is the flat steel used for equipotential grounding?: According to the GB 50054-2011 3.2.15 6# responses (table 3.2.15), the distribution system of equipotential bonding conductor may be 25mm2 copper; when the 1/2PE line section of not less than the case, must use 25mm2 copper (or the equivalent capacity of aluminum or steel); according to the GB 50057-2010 5.1.2 (table 5.1.2), lightning protection system equipotential bonding conductors with 16mm2 copper, can meet the minimum section of all the connecting parts of the requirements of lightning protection device. Therefore, "lightning protection system equipotential" equipotential bonding conductor specification is greater than "distribution system equipotential" equipotential connection conductor is not necessarily established.

Q:What is the typical shear strength of steel flat bars?: The typical shear strength of steel flat bars is approximately 50,000 pounds per square inch (psi). However, it can vary depending on the specific grade and thickness of the steel.

Q:What are the different methods of surface sanding for steel flat bars?: There are several different methods of surface sanding for steel flat bars. The choice of method depends on the desired finish and the specific requirements of the project. 1. Hand Sanding: This method involves using sandpaper or sanding blocks to manually sand the surface of the steel flat bars. It is a simple and cost-effective method, but it can be time-consuming and may not provide a uniform finish. 2. Belt Sanding: Belt sanding machines use abrasive belts to remove material from the surface of the steel flat bars. They are efficient and can achieve a consistent finish. Belt sanding machines come in different sizes and with various grit options, allowing for customization based on the desired outcome. 3. Disc Sanding: Disc sanding machines utilize rotating sanding discs to remove material from the surface of the steel flat bars. They can be used for heavy material removal or fine finishing, depending on the grit of the sanding discs. Disc sanding machines are available in different sizes and configurations to suit different needs. 4. Random Orbital Sanding: This method involves using a random orbital sander, which combines the spinning action of a disc sander with the random orbit motion of an orbital sander. The sanding discs used with this machine have a random pattern, which helps prevent swirl marks on the surface of the steel flat bars. Random orbital sanders are versatile and can be used for both material removal and fine finishing. 5. Vibratory Sanding: Vibratory sanding machines use vibration to remove material from the surface of the steel flat bars. They are often used for deburring, as well as for achieving a smooth finish. Vibratory sanding machines come in various sizes and can be equipped with different types of media, such as ceramic stones or plastic pellets, depending on the desired outcome. 6. Grinding: Grinding is a more aggressive method of surface sanding that uses a grinding wheel or disc to remove material from the steel flat bars. It is commonly used for heavy material removal, such as removing welds or shaping the steel flat bars. Grinding can be done manually or with the use of grinding machines, depending on the size and complexity of the project. Each method of surface sanding for steel flat bars has its advantages and limitations. The choice of method should be based on factors such as the desired finish, the amount of material to be removed, and the resources available. It is important to consider safety precautions and wear appropriate protective equipment, such as goggles and gloves, when using any of these methods.

Q:What is the maximum length of steel flat bars available?: The maximum length of steel flat bars available can vary depending on the manufacturer and supplier. However, standard lengths for steel flat bars typically range from 20 to 24 feet. It is important to note that longer lengths may be available for custom orders or specialty applications, but they may come at an additional cost or require special handling during transportation. Therefore, it is always recommended to consult with the specific manufacturer or supplier to determine the maximum length of steel flat bars that they offer.

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