HRB400 GB Steel Rebar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Theoretical weight and section area of each diameter as below for your information:

Diameter(mm)	Section area (mm²)	Mass(kg/m)	Weight of 12m bar(kg)
6	28.27	0.222	2.664
8	50.27	0.395	4.74
10	78.54	0.617	7.404
12	113.1	0.888	10.656
14	153.9	1.21	14.52
16	201.1	1.58	18.96
18	254.5	2.00	24
20	314.2	2.47	29.64
22	380.1	2.98	35.76
25	490.9	3.85	46.2
28	615.8	4.83	57.96
32	804.2	6.31	75.72
36	1018	7.99	98.88
40	1257	9.87	118.44
50	1964	15.42	185.04

Usage and Applications of Construction

1. Construction steel round bar is mostly used for straight bundles supply, and used for steel, bolts and various mechanical parts. While the bigger round bar, or more than 25mm hot rolled bar, is mainly for the manufacture of mechanical parts or for seamless steel billet.

2. Steel round bar is used in construction and a large number of architectural and engineering structures.

3. Besides, we can supply some especial material steel round bar that can be used for main shaft of steamer, hummer shank, with big section and supper force.

Packaging & Delivery

Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

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

Weight: Theprice 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 and the situation of the port of destination.

Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.

Q:What are the main factors affecting the machinability of alloy steel billets?: Several key factors influence the machinability of alloy steel billets. Firstly, the machinability can be affected by the alloy composition of the steel. Different alloying elements, including chromium, nickel, molybdenum, and vanadium, have varying impacts on the machinability. Chromium and molybdenum, which form hard carbides, tend to decrease machinability, while nickel and vanadium, which promote the formation of softer carbides, can enhance machinability. Secondly, the heat treatment of the alloy steel billets significantly impacts machinability. Processes such as annealing, normalizing, or quenching and tempering can alter the microstructure and hardness of the steel. Proper heat treatment can improve machinability by reducing hardness and increasing toughness, while improper heat treatment can result in increased hardness and decreased machinability. Thirdly, the presence of impurities and inclusions in the alloy steel billets can affect machinability. Inclusions, such as sulfides, oxides, and non-metallic particles, can cause tool wear and chip breakability issues during machining. Therefore, the cleanliness and purity of the alloy steel billets are crucial factors in determining machinability. Furthermore, the mechanical properties of the alloy steel, such as hardness, strength, and ductility, can influence machinability. Higher hardness and strength levels can make machining more challenging, while increased ductility and toughness can improve machinability. Lastly, the cutting conditions and machining parameters, including cutting speed, feed rate, depth of cut, and tool material, also impact machinability. Optimal cutting conditions should be selected based on the specific alloy steel composition and desired machinability. Adequate cooling and lubrication during machining are also essential to reduce friction and heat, preventing tool wear and improving machinability. In conclusion, the machinability of alloy steel billets is influenced by factors such as alloy composition, heat treatment, impurities and inclusions, mechanical properties, and cutting conditions. Proper consideration of these factors can help optimize the machinability of alloy steel and ensure efficient and effective machining processes.

Q:How are steel billets used in the manufacturing of construction machinery?: The manufacturing of construction machinery relies heavily on steel billets. These billets, which are semi-finished steel products, play a vital role in the industry as they serve as the primary raw material. The production of steel billets involves a process called continuous casting, in which molten steel is poured into a mold to form solid billets. Once the steel billets are ready, they undergo a series of manufacturing processes to shape them into the desired components for construction machinery. These processes include forging, rolling, and machining. Forging requires heating the billets to high temperatures and using pressure to shape them into various parts such as gears, shafts, and axles. Rolling, on the other hand, is a commonly used method in which the billets are passed through rolling mills to reduce their size and give them specific forms such as plates, bars, or sheets. These rolled billets can then be further processed to create components like chassis, frames, or structural beams for construction machinery. In addition to forging and rolling, machining processes are employed to shape the steel billets into intricate parts with precise dimensions. This involves using cutting tools to remove excess material and create specific shapes and features like holes, threads, or grooves. Machining is crucial in producing components such as engine parts, hydraulic cylinders, or gearboxes for construction machinery. Overall, steel billets serve as the initial stage in the manufacturing process of construction machinery. They provide the necessary raw material that undergoes various processes to become the required components. The strength, durability, and versatility of steel make it an ideal material for construction machinery, ensuring that the final product can withstand heavy loads, harsh environments, and demanding applications.

Q:I want to buy a fishing pole, I don't know how to distinguish it. Know what, please reply, thank you, [em10]!: The tonality of a fishing rod is actually modulated by a different modulus of carbon cloth.Some fishing overall with the 30T following carbon cloth, just use a very small amount of 40T or 46T carbon cloth, called high carbon rod, is actually confuse the public practice of fishing by weighing, hand identification, high carbon rod with real light, hard, two rods in a play, a ratio is obvious.

Q:How do steel billets contribute to the corrosion resistance of a product?: Steel billets, which are semi-finished steel products, contribute to the corrosion resistance of a final product by providing a high-quality base material. Steel billets are made from steel alloys that contain specific elements such as chromium, nickel, and molybdenum, which enhance the corrosion resistance properties of the steel. These alloying elements form a protective layer on the surface of the steel, known as a passive film, which prevents or slows down the corrosion process by acting as a barrier against corrosive agents. Additionally, the composition and processing of steel billets can be tailored to meet specific requirements, allowing for the production of corrosion-resistant products suitable for various applications.

Q:What are the different heat treatment processes for steel billets?: Steel billets can undergo various heat treatment processes, each serving a specific purpose and offering distinct advantages. Among the commonly used processes are annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing: The steel billets are heated to high temperatures and gradually cooled to room temperature. This process aims to reduce hardness, enhance machinability, relieve internal stresses, and refine the grain structure, resulting in a more ductile and less brittle steel. 2. Normalizing: By heating the steel billets above the critical range and cooling them in still air, the normalizing process refines the grain structure, improves mechanical properties and machinability, relieves internal stresses, and achieves uniformity in microstructure. 3. Quenching: Rapid cooling of steel billets is achieved by immersing them in a quenching medium like oil, water, or brine. Quenching transforms the austenite phase into martensite, making the steel harder and more wear-resistant. However, it may introduce residual stresses and the risk of cracking. 4. Tempering: Following quenching, tempering is often performed to reduce brittleness and enhance toughness. The quenched steel is reheated to a lower temperature and held for a specific time period. This process relieves stresses, decreases hardness, and improves ductility without sacrificing too much strength. 5. Case Hardening: This process elevates the surface hardness of steel billets while maintaining a tough and ductile core. Carburizing and nitriding are two common methods of case hardening. Carburizing involves heating the steel in a carbon-rich environment to introduce carbon into the surface. Nitriding, on the other hand, introduces nitrogen to form a hard nitride layer. These processes enhance wear resistance and prolong the lifespan of the steel billets. These heat treatment processes allow manufacturers to customize the properties of steel billets to meet specific application requirements. By carefully selecting and implementing the appropriate process, the resulting steel billets can exhibit a wide range of mechanical properties, including hardness, strength, toughness, and wear resistance.

Q:Can steel billets be used in the production of energy infrastructure?: Yes, steel billets can be used in the production of energy infrastructure. Steel is a widely used material in the construction of various energy infrastructure components such as power plants, transmission towers, pipelines, and wind turbine towers. Steel billets, which are semi-finished steel products, can be further processed and shaped into the required forms for these infrastructure projects. The strength, durability, and versatility of steel make it suitable for withstanding the harsh conditions and heavy loads associated with energy infrastructure. Additionally, steel offers excellent corrosion resistance, which is crucial for infrastructure exposed to the elements. Overall, steel billets play a vital role in the production of energy infrastructure, contributing to the reliable and efficient generation, transmission, and distribution of energy.

Q:Can steel billets be used for structural applications?: Yes, steel billets can be used for structural applications. Steel billets are semi-finished products commonly used in the manufacturing of various structural components such as beams, columns, and rods. These billets can be further processed through rolling or forging to create the desired shapes and sizes required for structural applications. The high strength and durability of steel make it a popular choice for constructing buildings, bridges, and other infrastructure projects.

Q:What shape is the billet?: Steel billet is a product made by steel-making furnace by casting. The billet can be divided into two kinds from the manufacturing process, mould blank and continuous casting billet. At present, the casting process has been basically eliminated.classification

Q:What is the role of steel billets in the shipbuilding industry?: The shipbuilding industry relies heavily on steel billets as they are the primary material used to build the structural components of ships. These billets, which are semi-finished steel products, are made by casting molten steel into rectangular shapes that can be further processed into various shipbuilding parts. Using steel billets in shipbuilding offers several advantages. Firstly, they are known for their high strength and durability, making them ideal for withstanding the intense stress and harsh conditions ships face, such as waves, corrosion, and extreme temperatures. This ensures the structural integrity and longevity of the vessel. In addition, steel billets have excellent weldability, which is crucial in shipbuilding as ships have numerous welded joints. The ease and reliability of welding steel billets allow for efficient and cost-effective construction methods, reducing both time and labor required. Furthermore, steel billets provide versatility in ship design. They can be easily shaped and fabricated into different forms and sizes, enabling shipbuilders to create complex structures that optimize space utilization and enhance functionality. This flexibility in design allows for the construction of various types of ships, from cargo vessels and tankers to cruise ships and naval vessels. Moreover, steel billets have excellent resistance to corrosion, which is essential for ships constantly operating in corrosive marine environments. The high-quality steel used in billets protects against rust and deterioration caused by seawater, ensuring the safety and longevity of the vessel. Overall, steel billets are crucial in shipbuilding as they provide the necessary strength, weldability, versatility, and corrosion resistance required for constructing durable and seaworthy ships. Their use as the primary raw material allows for the creation of reliable and efficient vessels capable of withstanding the challenging conditions of the maritime environment.

Q:How are steel billets used in the production of railway wheels?: Steel billets are an essential component in the production of railway wheels. These billets, which are essentially semi-finished steel forms, serve as the starting point for the manufacturing process. The first step in producing railway wheels involves taking the steel billets and heating them to a high temperature in a furnace. This process, known as hot rolling, helps to improve the malleability and ductility of the steel, making it easier to shape and form. Once the billets have reached the desired temperature, they are passed through a series of rollers that gradually shape them into the required size and shape for railway wheels. This process, known as rolling, applies high pressure to the billets, causing them to elongate and take on the desired form. After the rolling process, the shaped billets are further processed to remove any excess material and refine the surface finish. This ensures that the final product meets the required specifications for railway wheels. Finally, the shaped billets are sent for further machining, where they are turned, drilled, and finished to create the final railway wheel. This machining process helps to achieve the necessary dimensions, balance, and surface quality required for safe and efficient operation. In summary, steel billets play a crucial role in the production of railway wheels. They are heated, rolled, shaped, and then further processed to create the necessary components for the final product. Without steel billets, the production of railway wheels would not be possible.

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