Good quality deformed bars with grade HRB400

Good quality deformed bars with grade HRB400 System 1

Good quality deformed bars with grade HRB400

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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

Good quality deformed bars with grade HRB400

*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: What is the role of steel rebars in preventing cracks in concrete?: Steel rebars play a crucial role in preventing cracks in concrete by providing tensile strength. As concrete is strong in compression but weak in tension, rebars act as reinforcement, absorbing and distributing the tensile forces that would otherwise cause cracks. By resisting the tension, rebars reinforce the concrete structure, enhance its durability, and ensure it remains stable and crack-resistant over time.

Q: What are the factors that can cause steel rebars to corrode prematurely?: Premature corrosion of steel rebars can be influenced by various factors. Some of these include: 1. Moisture exposure: The presence of moisture is a primary catalyst for rebar corrosion. Prolonged exposure to water or high humidity levels can lead to rust or oxidation on the rebar surface. 2. Chloride ions: The corrosion process of steel rebars can be accelerated by chloride ions, commonly found in seawater or de-icing salts. These ions can enter the concrete cover and come into contact with the rebar, causing faster corrosion. 3. Carbonation of concrete: Concrete carbonation occurs when atmospheric carbon dioxide reacts with the alkaline components of concrete. This process reduces pH levels, diminishing the concrete cover's ability to passivate and increasing the likelihood of rebar corrosion. 4. Inadequate concrete cover: Insufficient concrete cover exposes rebars to external elements like moisture and chloride ions, leading to accelerated corrosion. Poor construction practices or inadequate design specifications can result in insufficient cover. 5. Poor concrete quality: Low-quality concrete used in construction may contain impurities or lack proper curing, making the concrete more permeable. This allows harmful substances like moisture and chlorides to penetrate easily, causing premature rebar corrosion. 6. Galvanic corrosion: Galvanic corrosion occurs when dissimilar metals come into contact in the presence of an electrolyte, such as moisture. For instance, if steel rebars come in contact with aluminum or copper materials, galvanic corrosion can occur. 7. Construction defects: Issues during the construction phase, such as inadequate workmanship or insufficient protective measures, can contribute to premature rebar corrosion. Examples include poor concrete compaction, improper reinforcement placement, or inadequate waterproofing. To prevent premature corrosion of steel rebars, it is essential to use high-quality materials, ensure adequate concrete cover, apply corrosion-resistant coatings or inhibitors, and employ appropriate construction practices. Regular inspections and maintenance can also help identify and address potential corrosion issues before they worsen.

Q: Are steel rebars suitable for use in earthquake-resistant structures?: Yes, steel rebars are suitable for use in earthquake-resistant structures. Steel rebars, also known as reinforcing bars, are commonly used in construction to provide structural strength and reinforcement. They have been proven to be effective in improving the strength and ductility of concrete structures, making them more resistant to seismic forces. During an earthquake, structures are subjected to intense shaking and ground motion. Steel rebars help in distributing and dissipating the energy generated by these seismic forces, thereby reducing the vulnerability of a structure to damage or collapse. The use of steel rebars enhances the overall structural integrity and stability, enabling buildings and other infrastructure to withstand the lateral and vertical forces associated with earthquakes. Moreover, steel rebars possess excellent tensile strength, which is crucial for seismic resistance. Unlike concrete, which is strong in compression but weak in tension, steel rebars provide the necessary reinforcement to counteract tensile stresses caused by seismic activity. This ability to resist both compression and tension makes steel rebars an ideal choice for earthquake-resistant structures. Additionally, steel rebars can be designed and installed in such a way that they provide additional ductility to a structure. Ductility refers to a material's ability to undergo deformation without fracturing. During an earthquake, structures with higher ductility can undergo significant deformations and absorb energy, reducing the risk of catastrophic failure. Steel rebars are known for their high ductility, allowing them to effectively absorb and dissipate seismic energy. In conclusion, steel rebars are highly suitable for use in earthquake-resistant structures. Their strength, ability to resist both compression and tension, and high ductility make them an essential component in ensuring the structural integrity and safety of buildings and infrastructure in seismic-prone areas.

Q: How do steel rebars contribute to the structural soundness of a building?: Steel rebars contribute to the structural soundness of a building by providing reinforcement to concrete structures. By adding strength and stability to the concrete, rebars help prevent cracks and structural failures, especially during heavy loads, seismic activities, or extreme weather conditions. They enhance the tensile strength of concrete, which is otherwise weak in tension, and allow it to withstand greater forces, thereby increasing the overall durability and longevity of the building.

Q: How do steel rebars affect the crack width in reinforced concrete?: Steel rebars play a crucial role in controlling and minimizing the crack width in reinforced concrete structures. The primary function of steel rebars is to provide tensile strength to the concrete, as concrete alone is weak in tension. When a load is applied to the reinforced concrete, the steel rebars resist the tensile forces, preventing cracks from widening. The presence of steel rebars helps distribute the stress and strain more evenly throughout the concrete. As a result, the cracks that may occur due to external loads or shrinkage are confined and their width is limited. The rebars act as reinforcement, inhibiting the propagation of cracks and reducing their width. This is especially important in structural elements such as beams and columns, where crack control is critical for maintaining the integrity and durability of the structure. The diameter, spacing, and arrangement of the rebars also influence the crack width in reinforced concrete. Properly designed and placed rebars provide optimal crack control. As the diameter and spacing of the rebars decrease, the crack width decreases as well. Additionally, the arrangement of rebars in a specific pattern, such as using a mesh or a grid, can further enhance crack control by providing additional resistance to crack propagation. Moreover, the bond between steel rebars and concrete is essential in crack width control. Adequate bond strength ensures that the rebars effectively transfer stress to the concrete, limiting crack width. Insufficient bond can lead to slip between the steel rebars and the concrete, allowing cracks to widen. In summary, steel rebars significantly affect crack width in reinforced concrete by providing tensile strength, distributing stress and strain, confining cracks, and enhancing the bond between the steel and concrete. Proper design, placement, and arrangement of rebars are crucial for effective crack control, improving the overall performance and longevity of reinforced concrete structures.

Q: How do steel rebars improve the structural integrity of a building?: Enhancing the structural integrity of buildings, steel rebars, also known as reinforcement bars, play a crucial role. Used in concrete construction, they provide strength, durability, and resistance against different forces that a structure may face. One way in which steel rebars enhance the structural integrity of a building is by increasing its load-bearing capacity. When rebars reinforce concrete, it becomes more capable of withstanding heavy loads and forces generated by gravity, wind, earthquakes, or dynamic loads from human activities. Acting as a network of reinforcement, the rebars distribute the load evenly throughout the structure, preventing excessive deflection and minimizing the risk of structural failure. Furthermore, steel rebars improve the tensile strength of concrete, which is traditionally weak in tension. While concrete is excellent at bearing compression forces, it lacks the ability to efficiently resist pulling or stretching forces. By incorporating rebars into the concrete, the combination of materials works together to withstand compression and tension forces more effectively. This prevents cracks and fractures from spreading in the concrete, as the rebars act as a support system that holds the structure together. Another advantage of using steel rebars is their resistance to corrosion. Steel is highly durable and can withstand harsh environmental conditions, reducing the risk of degradation over time. This ensures the longevity of the building's structural elements and reduces the need for expensive repairs or replacements. Additionally, steel rebars offer flexibility in design and construction. They can be molded into various shapes and sizes to meet specific structural requirements, allowing for optimal distribution of reinforcement where it is most needed. This flexibility enables architects and engineers to design buildings that are aesthetically pleasing and safe, without compromising on structural integrity. In conclusion, steel rebars significantly enhance the structural integrity of buildings by increasing load-bearing capacity, improving tensile strength, resisting corrosion, and providing design flexibility. By reinforcing concrete, they ensure that structures are better equipped to withstand various forces and maintain stability and safety over time.

Q: How do steel rebars prevent cracking in concrete?: Steel rebars prevent cracking in concrete by providing additional tensile strength to the composite material. As concrete is strong in compression but weak in tension, the steel rebars act as reinforcement and resist the tensile forces that can cause cracking. By distributing the applied loads more evenly throughout the structure, rebars help to enhance the structural integrity and durability of the concrete, preventing the formation and propagation of cracks.

Q: What are the guidelines for the proper cover thickness of steel rebars?: The guidelines for the proper cover thickness of steel rebars vary depending on the specific application and the code or standard being followed. However, in general, the cover thickness for steel rebars is determined based on factors such as the exposure conditions (e.g., moisture, chemicals), the structural requirements (e.g., load-bearing capacity), and the durability considerations. It is recommended to consult the applicable building codes, design standards, or engineering specifications to determine the specific guidelines for cover thickness in a given situation.

Q: What is the impact of steel rebars on the construction timeline?: The construction timeline is greatly affected by steel rebars. These rebars are essential in reinforced concrete structures and provide strength and durability to the overall construction. It is crucial to properly install and integrate them into the concrete elements to ensure the building's structural integrity. To begin with, delays in procuring or delivering steel rebars can have a significant impact on the construction timeline. This can cause a ripple effect, postponing or slowing down construction activities that require the presence of rebars, such as formwork, concrete pouring, and curing. As a result, the overall construction timeline may be delayed. Furthermore, the installation of rebars is a meticulous and time-consuming process. Construction teams must accurately place and secure the rebars according to design specifications and engineering drawings. This involves cutting, bending, and tying rebars to create the necessary reinforced structures. Any errors or rework needed during this phase can lead to additional time being spent, potentially causing delays in subsequent construction activities. In addition, coordination between different construction trades is crucial when working with rebars. The integration of electrical and plumbing systems with rebars must be done correctly before pouring the concrete. Miscommunication or lack of coordination can result in conflicts and rework, causing delays in the construction timeline. Moreover, the quality of rebars is vital to the construction timeline. Poor quality or defective rebars can pose safety concerns and potential structural issues. In such cases, remedial actions, such as removing and replacing faulty rebars, need to be taken, leading to delays and additional costs. In conclusion, steel rebars significantly impact the construction timeline. Factors such as availability, timely delivery, accurate installation, coordination with other trades, and quality influence the overall progress of a construction project. Proper planning, communication, and monitoring are essential to effectively incorporate rebars into the construction process, minimizing potential delays, and keeping the project on schedule.

Q: What are the different sizes of steel rebars available?: The different sizes of steel rebars available vary depending on the specific requirements of the construction project. Common sizes include #3 (3/8 inch diameter), #4 (1/2 inch diameter), #5 (5/8 inch diameter), #6 (3/4 inch diameter), #7 (7/8 inch diameter), #8 (1 inch diameter), and so on. These sizes are standardized and widely used in the construction industry.

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