Hot Rolled Deformed Steel Bar 12M Straight

Hot Rolled Deformed Steel Bar 12M Straight

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 100000 m.t./month

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Usage and Applications

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.

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

Packaging & Delivery

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

Cold Rolled Techniques

Yield Point: 545-565mpa

Q: How do steel rebars improve the strength and durability of concrete?: The strength and durability of concrete are greatly improved by steel rebars in several ways. Firstly, the inclusion of rebars reinforces the concrete structure, significantly increasing its tensile strength. While concrete is adept at resisting compression forces, it is weaker in tension. By embedding steel rebars within the concrete, the structure's ability to resist bending, cracking, and collapsing under heavy loads or external forces is greatly enhanced. Secondly, the presence of steel rebars prevents the occurrence of cracking and shrinkage in the concrete. As concrete dries and cures, it tends to shrink, leading to the formation of cracks. However, rebars help control and restrict this shrinkage by providing additional support and structural integrity. This effectively reduces the occurrence of cracks and ensures the long-term strength and durability of the concrete. Furthermore, the overall structural stability of the concrete is improved by steel rebars. When subjected to dynamic loads or seismic activity, concrete can undergo significant deformation or even fail. The inclusion of rebars helps distribute the load more evenly throughout the concrete structure, minimizing the risk of localized damage or collapse. This ultimately enhances the stability and safety of the concrete construction. Lastly, steel rebars contribute to the longevity and durability of concrete structures. The steel used in rebars is highly resistant to corrosion, which is a common issue in concrete exposed to harsh environmental conditions or moisture. By providing a protective layer called passivation, rebars prevent corrosion and maintain the structural integrity of the concrete over an extended period. This ensures that the concrete remains strong, durable, and resistant to degradation throughout its lifespan. In conclusion, steel rebars play a critical role in enhancing the strength and durability of concrete. They improve tensile strength, prevent cracking and shrinkage, enhance structural stability, and increase the lifespan of concrete structures. With the inclusion of steel rebars, concrete becomes a dependable and long-lasting construction material capable of withstanding various loads and environmental conditions.

Q: What is the process of testing the quality of steel rebars?: The process of testing the quality of steel rebars involves several steps to ensure their compliance with industry standards and specifications. 1. Visual Inspection: This initial step involves a visual examination of the rebars to identify any visible defects, such as cracks, surface irregularities, or improper dimensions. 2. Chemical Composition Analysis: A sample of the steel rebars is taken and subjected to chemical analysis to determine its composition, including the percentage of carbon, manganese, sulfur, phosphorus, and other elements. This analysis ensures that the steel meets the required composition standards for strength and durability. 3. Tensile Strength Test: A tensile strength test is conducted to measure the maximum amount of stress that the steel rebars can withstand without deformation or failure. This is achieved by applying a gradually increasing load to a sample of the rebar until it breaks. The tensile strength is then determined by dividing the breaking load by the cross-sectional area of the sample. 4. Bend Test: In the bend test, a sample of the rebar is bent to a specified angle without any cracks or fractures occurring. This test evaluates the rebar's ductility, which is crucial for its ability to withstand bending and shaping during construction. 5. Weldability Test: If the steel rebars are intended for use in welded structures, a weldability test is performed. This test assesses the ability of the rebars to be welded without any issues, such as cracking or loss of strength. 6. Dimensional and Weight Inspection: The rebars are measured for their dimensions, including length, diameter, and weight, to ensure compliance with the required specifications. Any deviations may indicate a potential quality issue. 7. Corrosion Resistance Test: Steel rebars are often exposed to harsh environmental conditions, including moisture and corrosive substances. Therefore, a corrosion resistance test is conducted to evaluate the rebar's ability to withstand corrosion over time. This test is typically carried out by subjecting the rebars to a corrosive environment or by using accelerated corrosion testing methods. 8. Non-Destructive Testing (NDT): NDT techniques, such as ultrasonic testing, magnetic particle inspection, or radiographic testing, may be employed to detect any internal defects or irregularities that are not visible to the naked eye. These tests help ensure the integrity and quality of the rebars. 9. Certification and Documentation: Once all the tests are completed and the steel rebars meet the required standards, they are certified and documented accordingly. This documentation serves as evidence of the quality and compliance of the rebars and is crucial for construction projects to ensure safety and durability. By following these comprehensive testing procedures, the quality of steel rebars can be thoroughly assessed, providing assurance to builders, engineers, and end-users that the steel rebars meet the necessary quality standards for their intended applications.

Q: What is the role of steel rebars in the construction of highway overpasses?: Steel rebars play a crucial role in the construction of highway overpasses as they provide reinforcement and strength to the concrete structures. Rebars are embedded within the concrete to enhance its tensile strength, making the overpass capable of withstanding heavy loads, vibrations, and external forces. This reinforcement ensures the durability, stability, and structural integrity of the highway overpasses, ensuring the safety of vehicles and pedestrians using them.

Q: How are steel rebars used in construction?: Steel rebars, also known as reinforcing bars, play a crucial role in construction projects. They are primarily used to reinforce concrete structures and provide strength and stability to building elements such as beams, columns, slabs, and foundations. In construction, rebars are typically laid in a grid pattern within the concrete formwork before pouring the concrete. This grid formation allows the rebars to distribute the tensile forces that occur in concrete structures, preventing cracking and enhancing structural integrity. The rebars are carefully placed at specific locations within the concrete elements based on the design and engineering specifications. They are generally spaced apart at predetermined intervals to ensure optimal reinforcement and to bear the anticipated loads. During the concrete pouring process, the wet concrete fully envelops the rebars, creating a bond between the two materials. As the concrete hardens and cures, it tightly grips the rebars, creating a composite structure that can resist bending, shearing, and other types of stress. Steel rebars are available in various sizes and grades, depending on the specific requirements of the construction project. They are typically made from carbon steel and may have different surface finishes to enhance their bonding capabilities with concrete. In addition to providing strength, rebars also help in controlling cracking caused by shrinkage, temperature changes, and external forces. By absorbing and distributing these forces, they minimize the risk of structural failure and ensure the overall stability and durability of the concrete components. Overall, steel rebars are essential components in construction as they reinforce concrete structures, increase load-bearing capacity, and enhance the longevity of buildings and infrastructure. Their proper placement and utilization are critical for building resilience, safety, and structural integrity.

Q: How do steel rebars contribute to the overall seismic performance of a structure?: Steel rebars contribute to the overall seismic performance of a structure by enhancing its strength, ductility, and energy dissipation capacity. These reinforcement bars are embedded in concrete and help to resist the forces generated during an earthquake. By providing tensile strength to the concrete, rebars prevent cracks and brittle failure, enabling the structure to withstand the seismic forces and safely dissipate the energy. Overall, steel rebars significantly improve the resilience and structural integrity of buildings during seismic events.

Q: What are the considerations for using epoxy-coated steel rebars?: When considering the use of epoxy-coated steel rebars, there are several important factors to take into account. These considerations include the corrosion resistance, durability, cost-effectiveness, and construction requirements. One primary consideration is the corrosion resistance provided by epoxy-coated steel rebars. The epoxy coating acts as a protective barrier against moisture, chemicals, and other corrosive elements that are typically present in concrete structures. This coating significantly reduces the risk of corrosion, thus increasing the lifespan of the rebar and the overall durability of the reinforced concrete. Durability is another key consideration. Epoxy-coated steel rebars are designed to withstand harsh environmental conditions, including exposure to chloride ions, which are known to accelerate corrosion in traditional black steel rebars. This enhanced durability ensures that the structure remains structurally sound over an extended period, reducing the need for costly repairs or replacements. Cost-effectiveness is also an important consideration. While epoxy-coated steel rebars may have a higher initial cost compared to black steel rebars, their long-term cost-effectiveness is evident. The reduced risk of corrosion and subsequent maintenance or repair expenses can result in significant savings over the life of a structure. Additionally, the extended lifespan of the rebar can contribute to lower life-cycle costs. Construction requirements must also be taken into consideration when using epoxy-coated steel rebars. The application of the epoxy coating requires careful handling and storage to prevent damage or contamination. Special care must be taken during transportation, storage, and installation to ensure the integrity of the coating. Contractors must also be trained and experienced in working with epoxy-coated steel rebars to ensure proper installation and adherence to industry standards. In conclusion, the considerations for using epoxy-coated steel rebars include their corrosion resistance, durability, cost-effectiveness, and the specific construction requirements they impose. While they may have a higher initial cost and require additional care during handling and installation, the long-term benefits of increased corrosion resistance and durability make them a favorable choice for reinforced concrete structures.

Q: How are steel rebars used in the construction of tunnels and underground passages?: Steel rebars are used in the construction of tunnels and underground passages to reinforce the concrete structures. They are embedded within the concrete to increase its strength and prevent cracking or collapsing under the pressure exerted by the surrounding soil or water. The rebars provide structural integrity and durability, ensuring the tunnels and passages can withstand the forces and stresses they encounter.

Q: Can steel rebars be used in structures with limited construction technology?: Indeed, structures with limited construction technology can still make use of steel rebars. Steel rebars are frequently employed in construction as a means of reinforcing concrete structures, providing them with strength and longevity. They possess versatility, enabling their usage in a variety of structure types such as buildings, bridges, and dams. Even in regions with limited construction technology, the utilization of steel rebars remains a feasible option. The fundamental procedure involves the bending and cutting of rebars to the necessary sizes and shapes, subsequently placing them within the concrete forms prior to pouring the concrete. This process can be executed with basic tools and equipment commonly found on construction sites with restricted resources. Moreover, the availability of steel rebars in various sizes and grades allows for flexibility in design and construction, rendering them suitable for a wide array of structures. By employing steel rebars, concrete structures can withstand diverse loads and forces, thereby enhancing their overall strength and durability. Although advanced construction technology may enhance the efficiency and precision of the construction process, it is not a prerequisite for employing steel rebars. Through proper training and expertise, construction workers can effectively utilize steel rebars in structures, even in situations where technology is limited, in order to create secure and dependable structures.

Q: Are there any specific safety precautions to be taken while handling steel rebars?: Yes, there are several safety precautions that should be taken while handling steel rebars. Here are some key points to consider: 1. Personal Protective Equipment (PPE): Always wear appropriate PPE, including safety goggles or glasses, gloves, and steel-toed boots. This will help protect against eye injuries, cuts, and crushed toes. 2. Lifting Techniques: When lifting rebars, use proper lifting techniques such as bending at the knees, keeping the back straight, and using leg muscles to lift the load. Avoid twisting or jerking motions while lifting to prevent strains or sprains. 3. Proper Storage: Store rebars in an organized and secure manner, ensuring they are not leaning against walls or other structures. This will prevent them from falling and causing injuries. 4. Sharp Edges: Be cautious of the sharp edges on rebars. Always handle them with care to avoid cuts or punctures. It is recommended to wear protective gloves to reduce the risk of hand injuries. 5. Secure Transportation: When transporting rebars, secure them properly to prevent movement or falling off the vehicle. Use appropriate restraints such as ropes or straps to secure the load safely. 6. Electrical Hazards: Be aware of any overhead power lines or live electrical sources near the working area. Maintain a safe distance from them to prevent accidental contact with the rebars, which can conduct electricity. 7. Communication and Awareness: Always communicate with other workers in the vicinity to ensure everyone is aware of the presence of rebars. This will help prevent accidental injuries caused by tripping or colliding with the rebars. By following these safety precautions, you can minimize the risk of accidents or injuries while handling steel rebars. It is also important to undergo proper training and adhere to any specific safety guidelines provided by your employer or industry regulations.

Q: Can steel rebars be bent or shaped during construction?: Yes, steel rebars can be bent or shaped during construction. Steel rebars are commonly used in reinforced concrete structures to provide strength and stability. They are typically manufactured in straight lengths but can be easily bent or shaped to fit the specific design requirements of the construction project. This flexibility allows contractors to customize the rebars to reinforce different areas of the structure, such as columns, beams, or slabs. The process of bending or shaping rebars is usually done using specialized equipment, such as rebar benders or hydraulic tools. By bending or shaping the rebars, construction professionals can ensure that the reinforced concrete structure meets the necessary load-bearing and structural integrity standards.

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