GB Standard Steel Round Bar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Specifications of Steel Round Bar:

1. Standard: GB

2. Grade: Q345

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

4. Shape: Round bar, solid bar of steel with circular section

5. Technique: Hot rolled

Size:

Size (mm)	Section Area (cm²)	Mass (Kg/m)
13	132.665	1.04
14	153.86	1.21

Packaging & Delivery of Steel Round Bar:

Packaging Detail: Standard seaworthy packing or as customer required; all goods are packed in bundle with steel strips and shipped by break bulk vessel or container

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF or as customer required

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: The price invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request.

Documents given: Full set (3/3) of original clean on board bill of lading; Original signed commercial invoice, in 3 originals and 3 copies; Original packing list in 3 originals and 3 copies; Policy of insurance; Certificate of origin and what the target market needs.

* If you would like to get our price, please inform us the size, standard/material and quantity. Thank you very much for your attention.

Q: Are steel round bars used in the aerospace industry?: Indeed, it is common practice to employ steel round bars within the aerospace industry. Renowned for their exceptional strength, durability, and resistance to corrosion, these round bars prove themselves as an excellent choice for aircraft components and structures. They find frequent application in the creation of landing gears, engine mounts, structural frames, and other pivotal aircraft parts. Moreover, steel round bars are also utilized in the production of aerospace fasteners, such as bolts and screws, owing to their capacity to endure immense stress and establish a steadfast connection. In summary, the pivotal role played by steel round bars in guaranteeing the safety and dependability of aerospace systems cannot be overstated.

Q: Can steel round bars be machined using CNC equipment?: Yes, steel round bars can be machined using CNC equipment. CNC (Computer Numerical Control) machines are capable of accurately and precisely shaping steel round bars into various desired forms and dimensions.

Q: Can steel round bars be used for gear applications?: Yes, steel round bars can be used for gear applications. Steel round bars are often used in the manufacturing of gears due to their high strength and durability. They provide excellent mechanical properties, such as hardness and wear resistance, which are essential for gear applications. Steel round bars can be machined and heat-treated to achieve the desired tooth profile and surface finish required for gears. Additionally, steel round bars offer good dimensional stability and can withstand high loads and torque, making them suitable for various gear applications in industries such as automotive, machinery, and heavy equipment.

Q: Can steel round bars be used for making camshafts?: Yes, steel round bars can be used for making camshafts. Steel is a common material used for camshaft production due to its high strength, durability, and resistance to wear and fatigue. Steel round bars can be machined and shaped into the desired profile, making them suitable for manufacturing camshafts that are critical components in internal combustion engines. The specific type of steel used will depend on the application and performance requirements, but commonly used steels include alloy steels or carbon steels with high mechanical properties. Overall, steel round bars offer a reliable and cost-effective option for producing camshafts that can withstand the demanding conditions of engine operation.

Q: What are the different types of surface defects in steel round bars?: Steel round bars can have different types of surface defects, which can vary in severity and affect the quality and performance of the bars. Common surface defects include: 1. Scale: During manufacturing, an oxide layer called scale can form on the surface of the steel. Scale appears as a rough, flaky layer and negatively affects the bar's appearance and surface finish. 2. Pits: Small depressions or cavities can occur on the bar's surface due to corrosion, mechanical damage, or manufacturing defects. Pits weaken the bar's structural integrity and increase the risk of failure. 3. Scratches: Shallow grooves or marks can be caused by handling, transportation, or contact with other objects during manufacturing. While scratches may not significantly impact the bar's strength, they do affect its appearance and surface finish. 4. Cracks: Linear fractures on the bar's surface can result from excessive stress, thermal cycling, or manufacturing defects. Cracks are extremely harmful to the bar's strength and integrity and can lead to catastrophic failure if not addressed. 5. Decarburization: Loss of carbon from the steel bar's surface layer, which can occur during heating or cooling processes. This process results in a softer and weaker surface layer, reducing the bar's overall strength and durability. 6. Lamination: Separation or delamination of layers within the steel bar, caused by improper bonding or rolling conditions during manufacturing. Lamination weakens the bar's structural integrity and increases the likelihood of failure. 7. Inclusions: Non-metallic particles or impurities present on the bar's surface, caused by contaminants in raw materials or improper manufacturing processes. Inclusions negatively impact the bar's mechanical properties and performance. To ensure the quality and performance of steel round bars, it is crucial to identify and address these surface defects. Various inspection and testing methods can be used, such as visual inspection, ultrasonic testing, magnetic particle inspection, and dye penetrant inspection.

Q: What is the yield strength to tensile strength ratio of a steel round bar?: The yield strength to tensile strength ratio of a steel round bar is typically around 0.85.

Q: Can steel round bars be recycled?: Yes, steel round bars can be recycled. Steel is a highly recyclable material, and the recycling process involves melting the steel bars down to be used in the production of new steel products.

Q: Can steel round bars be used in the oilfield equipment industry?: Steel round bars have a wide range of applications in the oilfield equipment industry. They are highly favored for their remarkable strength, durability, and resistance to corrosion. In fact, they are extensively utilized in the manufacturing of numerous components and equipment, including drill collars, drill bits, valves, and pump shafts. By incorporating steel round bars, the oilfield industry ensures that its equipment can endure the severe conditions and immense pressures encountered during operations. Furthermore, steel round bars can be effortlessly welded and machined to meet particular specifications, adding to their versatility and making them an optimal selection for the oilfield sector.

Q: How do you prevent steel round bars from warping during machining?: To prevent warping of steel round bars during machining, there are multiple measures that can be implemented: 1. Opt for appropriate material selection: Select steel round bars with minimal residual stress and a consistent internal structure. This will decrease the likelihood of warping during machining. 2. Prioritize stress relief before machining: Prior to machining, subject the steel round bars to stress-relieving heat treatment. This procedure assists in releasing internal stress and stabilizing the material, resulting in reduced warping. 3. Ensure proper machine setup: Guarantee that the machine used for machining the steel round bars is accurately calibrated and aligned. Any misalignment or imbalance can induce stress and lead to warping. Regular maintenance and inspection of machine components are crucial. 4. Employ suitable cooling techniques: While machining, employ appropriate cooling methods to control the temperature. Excessive heat buildup can cause thermal distortion and warping. Implementing lubricants and coolants effectively dissipates heat, maintaining stable machining conditions. 5. Utilize the correct cutting tools: Utilize high-quality cutting tools specifically designed for machining steel. Dull or incorrect tools generate excessive heat and contribute to warping. Regular inspection and replacement of tools are essential for optimal performance. 6. Adjust cutting parameters appropriately: Modify cutting parameters such as cutting speed, feed rate, and depth of cut according to the specific steel grade and machining operation. Inappropriate cutting parameters generate excessive heat and increase the risk of warping. 7. Minimize interrupted cuts: Whenever possible, avoid interrupted cuts as they create stress concentrations and raise the probability of warping. If interrupted cuts are necessary, employ proper tool entry and exit strategies to minimize stress points. 8. Implement post-machining stress relief: After machining, subject the steel round bars to stress-relieving heat treatment once again to alleviate any residual stresses induced during the machining process. This step further reduces the chances of warping. By adhering to these preventive measures, the risk of steel round bars warping during machining can be significantly reduced, ensuring the production of high-quality and precise machined components.

Q: What are the common industries that use steel round bars?: Some common industries that use steel round bars include construction, manufacturing, automotive, aerospace, oil and gas, and machinery.

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