Steel Round Bar-Standard GB

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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)
25	490.625	3.85
26	530.66	4.17
28	615.44	4.83

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 suitable for use in the construction industry?: Yes, steel round bars are commonly used in the construction industry due to their strength, durability, and versatility. They provide structural support in various applications such as reinforcement in concrete, framing, and the creation of beams and columns. Additionally, steel round bars can be easily fabricated, welded, and formed into different shapes, making them a suitable choice for a wide range of construction projects.

Q: Can steel round bars be used for making agricultural equipment or machinery?: Yes, steel round bars can be used for making agricultural equipment or machinery. Steel is a commonly used material in the construction of such equipment due to its high strength, durability, and resistance to wear and tear. Steel round bars can be used to manufacture components like axles, shafts, handles, and structural supports, providing the necessary strength and reliability required for agricultural applications.

Q: What is the difference between a rough turned and a polished steel round bar?: A rough turned steel round bar has undergone a preliminary machining process that removes surface imperfections and excess material, providing a slightly smoother finish. On the other hand, a polished steel round bar has undergone further polishing or grinding processes to achieve a much smoother and aesthetically appealing surface finish.

Q: What are the different surface defects that can occur in steel round bars?: Steel round bars can experience various surface defects, which can be categorized based on their appearance and severity. Some common defects include: 1. Scale: During the manufacturing process, a thin layer of oxide, known as scale, can form on the steel's surface. It appears rough and flaky and can be easily removed mechanically. 2. Pits: Small depressions or craters, caused by corrosion or mechanical damage, can occur on the steel's surface. Pits weaken the steel's structural integrity and may require repair or replacement. 3. Scratches: Shallow grooves or cuts, resulting from handling, transportation, or machining, can be found on the steel's surface. While minor scratches may not impact performance, deep scratches can cause stress concentration and potential failure. 4. Roll marks: Raised or depressed lines or patterns, formed during the rolling process, can be seen on the steel's surface. Uneven pressure distribution between rolls causes these marks, affecting dimensional accuracy and surface quality. 5. Laminations: Thin layers or bands of non-metallic inclusions parallel to the steel's surface, caused by inadequate refining or improper casting techniques, are known as laminations. They reduce strength and toughness, requiring further processing or rejection. 6. Decarburization: The loss of carbon content on the steel's surface, occurring during heating, annealing, or hot working, is referred to as decarburization. It decreases hardness and strength, potentially leading to premature failure. 7. Surface cracks: Visible cracks on the steel's surface, caused by excessive cooling rates, improper heat treatment, or mechanical stress, are surface cracks. They compromise structural integrity and may necessitate repairs or rejection. These examples cover just a few of the possible surface defects in steel round bars. It is crucial to inspect and address these defects to ensure the steel's quality and performance in various applications.

Q: Can steel round bars be used in structural applications?: Yes, steel round bars can be used in structural applications. Steel round bars are commonly used in construction and engineering projects where strength and durability are important. They are versatile and can be used for various structural elements such as beams, columns, and supports. Steel round bars have excellent mechanical properties, including high tensile strength and good ductility, making them suitable for withstanding heavy loads and resisting deformation. Additionally, steel round bars can be easily joined or connected to other structural components, making them a popular choice in the construction industry.

Q: What are the advantages of using nickel-chromium-silicon alloy steel round bars?: Using nickel-chromium-silicon alloy steel round bars offers several benefits: 1. Exceptional heat resistance: These round bars can withstand extreme temperatures up to 1200°C without compromising their strength or structure. This makes them ideal for applications in high-temperature environments. 2. Effective against corrosion: The alloy steel round bars exhibit good resistance to corrosive substances like acids and alkalis. This makes them suitable for industries such as chemical processing, oil and gas, and marine applications. 3. Strong and durable: These round bars possess high tensile strength and toughness, enabling them to endure heavy loads and resist deformation. They are known for their exceptional durability, ensuring a long service life even in demanding conditions. 4. Impressive mechanical properties: The alloy steel round bars display excellent mechanical properties, including ductility, impact resistance, and fatigue strength. This makes them suitable for applications requiring reliability and high performance, such as structural components, machine parts, and tools. 5. Easy to fabricate: The nickel-chromium-silicon alloy steel round bars can be machined, welded, and formed into various shapes and sizes with ease. This grants manufacturers greater design flexibility and simplifies fabrication processes. 6. Cost-effective solution: Despite their numerous advantages, nickel-chromium-silicon alloy steel round bars are relatively cost-effective compared to other high-performance materials. Their longevity and resistance to wear and tear reduce the need for frequent replacements and maintenance, making them a cost-efficient choice in the long run. Overall, the advantages of nickel-chromium-silicon alloy steel round bars make them an excellent option for applications requiring high temperature resistance, corrosion resistance, strength, durability, and ease of fabrication.

Q: Are steel round bars suitable for machining operations?: Yes, steel round bars are suitable for machining operations. Steel is known for its high strength and durability, making it an excellent material for various machining processes. Steel round bars can be easily shaped, cut, drilled, and turned to create precise components or parts. Machining operations such as milling, drilling, and turning can be efficiently performed on steel round bars to achieve the desired shape, size, and finish. Additionally, steel round bars offer good dimensional stability and excellent mechanical properties, allowing for accurate and consistent machining results. Overall, steel round bars are a reliable choice for machining operations in various industries including automotive, aerospace, construction, and manufacturing.

Q: Can steel round bars be machined or forged?: Yes, steel round bars can be machined or forged. Machining involves using cutting tools to remove material from the round bar to achieve the desired shape or dimension. It can be done through various methods such as turning, milling, drilling, or grinding. Machining is commonly used to create precise components or parts. On the other hand, forging is a process where the steel round bar is heated and shaped by applying compressive forces. This is typically done using a hammer or a press to deform the material and create the desired shape. Forging helps enhance the mechanical properties of the steel, such as strength and toughness, by aligning the grain structure and removing any internal defects. Both machining and forging methods can be used to shape and manipulate steel round bars to meet specific requirements for various applications in industries such as automotive, construction, energy, and manufacturing. The choice between machining or forging depends on factors like the complexity of the part, required tolerances, material properties, and the desired final product.

Q: What are the different heat treatment processes used for steel round bars?: Steel round bars can undergo several heat treatment processes to enhance their mechanical properties and overall performance. These processes include annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing involves heating the steel round bars to a specific temperature and then slowly cooling it to relieve internal stresses and improve ductility. It also refines the grain structure, making the steel softer and more workable. 2. Normalizing is similar to annealing, but the steel round bars are cooled in still air. This process refines the grain structure and improves mechanical properties like strength and toughness. 3. Quenching is a rapid cooling process where the steel round bars are immersed in a quenching medium such as oil, water, or polymer. It achieves high hardness and strength by transforming the steel's microstructure into martensite. However, it can also make the steel more brittle, so tempering is often done afterward. 4. Tempering involves reheating the quenched steel round bars to a specific temperature and then slowly cooling it. This process reduces the brittleness caused by quenching and improves toughness and ductility. The temperature and duration of tempering can be adjusted for desired mechanical properties. 5. Case hardening is a surface heat treatment process that increases hardness and wear resistance. Carbon or other alloying elements are introduced to the steel's surface, which is then heated to a specific temperature. This creates a hardened outer layer while maintaining a tough core. These heat treatment processes offer steel round bars a wide range of mechanical properties and performance characteristics, making them suitable for various applications in industries like automotive, construction, manufacturing, and aerospace. The choice of specific heat treatment process depends on desired properties, steel composition, and intended application of the round bars.

Q: What is the maximum titanium content allowed for steel round bars?: The maximum titanium content allowed for steel round bars typically depends on the specific steel grade and composition. However, as a general guideline, the maximum titanium content in steel round bars is usually around 0.05-0.06%.

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