HRB400 deformed bars with competitive price
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 100000 m.t./month
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Product Description:
Specifications of HRB400 Deformed Steel Bar:
Standard | GB | HRB400 | |
Diameter | 10mm-32mm | ||
Length | 6M, 12M | ||
Place of origin | Hebei, China mainland | ||
Advantages | exact size, regular package, chemical and mechanical properties are stable. | ||
Type | Hot rolled deformed steel bar |
Chemical Composition: (Please kindly find our chemistry of our material based on HRB400 as below for your information)
Grade | Technical data of the original chemical composition (%) | ||||||
C | Mn | Si | S | P | V | ||
HRB400 | ≤0.25 | ≤1.60 | ≤0.80 | ≤0.045 | ≤0.045 | 0.04-0.12 | |
Physical capability | |||||||
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) | |||||
≥400 | ≥570 | ≥14 |
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) |
18 | 254.5 | 2.00 | 24 |
20 | 314.2 | 2.47 | 29.64 |
22 | 380.1 | 2.98 | 35.76 |
Usage and Applications of HRB400 Deformed Steel Bar:
Deformed bar is widely used in buildings, bridges, roads and other engineering construction. Big to highways, railways, bridges, culverts, tunnels, public facilities such as flood control, dam, small to housing construction, beam, column, wall and the foundation of the plate, deformed bar is an integral structure material. With the development of world economy and the vigorous development of infrastructure construction, real estate, the demand for deformed bar will be larger and larger..
Packaging & Delivery of HRB400 Deformed Steel Bar:
Packaging Detail: products are packed in bundle and then shipped by container or bulk vessel, deformed bar is usually naked strapping delivery, when storing, please pay attention to moisture proof. The performance of rust will produce adverse effect.
Each bundle weight: 2-3MT, or as required
Payment term: TT or L/C
Delivery Detail: within 45 days after received advanced payment or LC.
Label: to be specified by customer, generally, each bundle has 1-2 labels
Trade terms: FOB, CFR, CIF
*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: Can steel rebars be used in architectural or decorative concrete applications?
- Yes, steel rebars can be used in architectural or decorative concrete applications. They provide structural reinforcement and enhance the overall strength and durability of the concrete. Additionally, when properly designed and installed, steel rebars can be concealed or incorporated into the design, making them suitable for various aesthetic purposes in architectural or decorative concrete projects.
- Q: Can steel rebars be used in the construction of residential buildings?
- Yes, steel rebars can be used in the construction of residential buildings. Steel rebars are commonly used in reinforced concrete structures for their strength and durability. In residential construction, steel rebars are primarily used to reinforce concrete foundations, beams, columns, and slabs. They provide additional support and help enhance the structural integrity of the building, ensuring it can withstand various loads and forces. Steel rebars are preferred over other materials for their high tensile strength, resistance to corrosion, and ability to withstand extreme weather conditions. Additionally, they are easily available, cost-effective, and can be customized to meet specific building requirements. Therefore, steel rebars are an essential component in the construction of residential buildings, ensuring their long-lasting stability and safety.
- Q: What is the role of steel rebars in tunnel lining construction?
- The role of steel rebars in tunnel lining construction is to reinforce the concrete structure and provide added strength and durability. They help distribute the load and prevent cracks or collapses, ensuring the stability and long-term integrity of the tunnel.
- Q: Can steel rebars be used in structures with high radiation shielding requirements?
- Structures with high radiation shielding requirements can indeed utilize steel rebars. Steel is renowned for its remarkable strength and durability, making it a favored option for reinforcing concrete structures. In terms of radiation shielding, steel rebars possess the capability to effectively offer a certain level of protection due to their dense composition. Although steel itself is not as potent a radiation shield as materials like lead or concrete, it still plays a role in reducing radiation transmission. The density of steel aids in dispersing and absorbing some of the radiation that passes through the structure, thus diminishing overall exposure. However, it is crucial to recognize that structures with exceptionally high radiation shielding requirements may necessitate additional measures. These measures could involve incorporating other radiation-absorbing materials such as lead or concrete, or implementing specific design features to enhance the structure's shielding capabilities. Ultimately, the selection of materials and design considerations should be made in collaboration with radiation safety experts and engineers who can evaluate the specific shielding requirements and propose the most suitable solutions.
- Q: What is the process of joining steel rebars together?
- Rebar splicing or rebar connection is a common practice in reinforcing concrete structures to ensure their strength and integrity. Joining steel rebars can be achieved through various methods, each with its own advantages and suitability based on project requirements. Here are some frequently used techniques: 1. Lap Splicing: This traditional and widely adopted method involves overlapping two rebars and securing them together using wire or steel tie bars. The length of the overlap is typically determined by engineering codes and standards. 2. Mechanical Splicing: A more reliable and efficient option, mechanical splicing employs specially designed couplers or connectors to join rebars. These couplers, often threaded or tapered, allow the rebars to be screwed or wedged into the connector. 3. Welding: In certain situations, rebars can be joined through welding. This technique entails heating the rebars to their melting point and fusing them together using an electric arc. Welded splices are commonly used in large-scale construction projects that require high strength and durability. 4. Compression Splicing: Compression splicing involves using compression fittings or sleeves to join rebars. The rebars are inserted into the sleeves, and a hydraulic press is utilized to compress the fitting, creating a strong connection. Compression splicing is particularly advantageous when dealing with rebars of different sizes or in areas with limited space for lap splicing. Determining the appropriate method for joining steel rebars relies on factors such as structural design, load requirements, and construction constraints. It is crucial to consult with structural engineers and adhere to local building codes and regulations to ensure the proper and safe execution of the rebar splicing process.
- Q: What are the international standards for steel rebars?
- The international standards for steel rebars are set by various organizations and bodies such as the International Organization for Standardization (ISO), American Society for Testing and Materials (ASTM), and the European Committee for Standardization (CEN). ISO provides standards for steel rebars under ISO 15630, which covers both hot-rolled and cold-worked rebars. This standard defines the requirements for the chemical composition, mechanical properties, dimensions, and tolerances of rebars used in reinforced concrete structures. ASTM has developed several standards for steel rebars, including ASTM A615/A615M and ASTM A706/A706M. ASTM A615/A615M covers deformed and plain carbon-steel rebars for concrete reinforcement, specifying the chemical composition, mechanical properties, dimensions, and marking requirements. ASTM A706/A706M focuses on low-alloy steel rebars with improved weldability, suitable for use in concrete structures where welding is required. In Europe, CEN has established the Eurocode 2 (EN 1992-1-1) as the primary standard for steel rebars. This code provides design rules for the structural use of concrete and includes guidelines for the selection and use of rebars. Additionally, CEN has also developed EN 10080, which specifies the requirements for steel rebars for concrete reinforcement, covering chemical composition, mechanical properties, dimensions, and tolerances. These international standards ensure the quality and consistency of steel rebars used in construction projects worldwide. Compliance with these standards helps to ensure the safety and reliability of reinforced concrete structures by providing guidelines for material properties, manufacturing processes, and quality control measures.
- Q: Can steel rebars be used in precast concrete applications?
- Precast concrete applications can make use of steel rebars. When referring to precast concrete, it means the process of casting concrete elements like walls, slabs, or beams in a controlled environment before transporting them to the construction site for installation. Steel rebars, which are typically made of carbon steel and have ribs on their surface to enhance adhesion to the concrete, are commonly utilized to reinforce precast concrete elements. The utilization of steel rebars in precast concrete applications comes with several advantages. Firstly, the presence of rebars increases the overall strength and durability of the precast concrete elements, enabling them to handle higher loads and reducing the risk of structural failure. Additionally, rebars enhance the resistance of precast elements to cracking and shrinkage, thereby ensuring better long-term performance. Furthermore, steel rebars facilitate the efficient transfer of tensile forces within precast concrete elements. While concrete exhibits excellent compressive strength, it is relatively weak in tension. By incorporating rebars into precast elements, the tensile forces generated during service can be effectively absorbed by the rebars, preventing cracks and maintaining the structural integrity of the element. Moreover, steel rebars offer flexibility in design and construction. Precast concrete elements can be manufactured in a wide range of shapes and sizes to meet specific project requirements, and the inclusion of rebars allows for greater design freedom. This enables the creation of complex and intricate precast elements that can be customized to suit various architectural and structural designs. In conclusion, steel rebars are crucial components in precast concrete applications. Their inclusion significantly enhances the strength, durability, and performance of precast concrete elements. By resisting tensile forces and providing structural integrity, steel rebars play a vital role in ensuring the safety and longevity of precast concrete structures.
- Q: What is the effect of moisture on steel rebars?
- The effect of moisture on steel rebars can be significant and can lead to various issues. Moisture can accelerate the corrosion process of steel rebars, causing them to rust and deteriorate over time. This corrosion weakens the structural integrity of the rebars and can lead to structural failures in concrete structures. When steel rebars are exposed to moisture, the water reacts with the iron in the steel, causing an electrochemical reaction known as corrosion. This reaction produces iron oxide or rust, which expands and causes the rebars to crack and spall. As the corrosion progresses, the rebars lose their strength, which can compromise the overall stability of the structure. Moisture can also contribute to the formation of carbonation in concrete, which further increases the risk of corrosion for steel rebars. Carbonation occurs when carbon dioxide from the atmosphere reacts with the calcium hydroxide in concrete, reducing the alkalinity of the concrete. This reduction in alkalinity lowers the passivation of the rebars, making them more susceptible to corrosion. In addition to corrosion, moisture can also lead to other problems such as concrete expansion, freeze-thaw damage, and efflorescence. When moisture enters the concrete and freezes, it expands, causing cracking and spalling. This freeze-thaw cycle can further accelerate the corrosion process of steel rebars. Efflorescence, on the other hand, is the crystalline deposit that forms on the surface of concrete when moisture evaporates and leaves behind salts. This white, powdery substance can degrade the appearance of concrete structures and indicate potential moisture-related issues. To mitigate the effects of moisture on steel rebars, various preventive measures can be taken. These include using corrosion-resistant rebars, applying protective coatings or membranes to the rebars, ensuring proper concrete cover over the rebars, and implementing proper drainage systems to prevent the accumulation of moisture. Regular inspections and maintenance are also crucial to identify and address any moisture-related issues before they escalate and cause structural problems.
- Q: What are the guidelines for ensuring proper concrete cover over steel rebars?
- To ensure the long-term durability and performance of reinforced concrete structures, it is crucial to have the appropriate concrete cover over steel rebars. Here are some tips to achieve the correct cover: 1. Compliance with building codes and specifications is essential. These regulations establish minimum requirements for concrete cover over steel rebars to ensure structural integrity, fire resistance, and corrosion resistance. It is important to consult and adhere to the applicable codes and specifications for your project. 2. Determine the required concrete cover based on factors such as environmental conditions, exposure to aggressive agents, structural design, and reinforcement type. Structural engineers typically assess these factors to determine the necessary cover and protect the rebars adequately. 3. Carefully select the concrete mix design to achieve the desired strength, durability, and workability. Consider factors like the quality and size of aggregates, cement content, water-to-cement ratio, and use of additives or admixtures. A well-designed mix will promote proper bonding and sufficient protection of the rebars. 4. Maintain proper construction practices. This includes using appropriate formwork and reinforcement placement techniques, ensuring correct concrete placement, compaction, and curing. Proper positioning and secure tying of the rebars are crucial to maintain the required cover and prevent displacement during concrete pouring. 5. Regular inspections and monitoring during construction are necessary. Check the placement of reinforcement, cover thickness, and overall concrete quality. Address and rectify any deviations from the specified requirements promptly. 6. Protect against corrosion. Adequate concrete cover helps prevent corrosion, but additional measures can enhance durability. Consider using corrosion-resistant rebars, applying epoxy coatings, or utilizing corrosion inhibitors to further protect the reinforced concrete structure. 7. Document and maintain records of the construction process, including reinforcement placement, cover thickness, and any modifications made. This documentation will be useful for future reference, maintenance, and repairs. By following these guidelines, you can ensure the appropriate concrete cover over steel rebars, resulting in durable and structurally sound reinforced concrete structures. It is always advisable to consult with structural engineers and construction professionals to meet specific project requirements and comply with local building codes and regulations.
- Q: How do steel rebars affect the overall construction cost of commercial buildings?
- The overall construction cost of commercial buildings can be significantly affected by steel rebars. These rebars, commonly used to reinforce concrete structures, play a vital role in guaranteeing the building's strength and durability. To begin with, the cost of steel rebars can directly impact the construction budget. Their price varies depending on market conditions and availability, and since they are an essential component in construction, their cost can directly affect the project's expenses. Additionally, the installation of steel rebars adds to the construction cost by requiring skilled labor and specialized equipment. Skilled ironworkers are necessary to accurately place the rebars according to the structural design. The labor cost associated with this skilled work can constitute a significant portion of the overall construction budget. Furthermore, the cost is also influenced by the quantity and density of steel rebars used in the construction. The structural engineer determines the necessary amount and spacing of rebars based on the building's design and load-bearing capacities. In certain cases, more rebars are needed to meet specific safety standards or withstand higher levels of stress. This increased quantity of steel rebars inevitably leads to higher material and labor costs. However, it is essential to note that the use of steel rebars is indispensable in commercial buildings to ensure structural integrity and safety. Although they may contribute to the overall cost, their benefits outweigh the expenses. Steel rebars reinforce concrete, enhancing its tensile strength and ability to withstand external forces like earthquakes, wind, and heavy loads. Ultimately, this results in a longer lifespan for the building and reduces the likelihood of expensive repairs or structural failures in the future. In conclusion, the cost of steel rebars impacts the overall construction cost of commercial buildings due to the cost of the rebars themselves, the labor required for installation, and the quantity needed based on the structural design. Nevertheless, the use of steel rebars is crucial to guarantee the strength and durability of the building, reduce long-term maintenance costs, and ensure the safety of occupants.
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HRB400 deformed bars with competitive price
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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