Deformed bars in Grade HRB400 with High Quality

Deformed bars in Grade HRB400 with High Quality System 1

Deformed bars in Grade HRB400 with High Quality

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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	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Place of origin	Hebei, China mainland
Advantages	exact size, regular package, chemical and mechanical properties are stable.
Type	Hot rolled deformed steel bar
Brand name	DRAGON

Chemical Composition: (Please kindly find our chemistry of our material based on HRB500 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)
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 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

Q:What are the guidelines for protecting steel rebars during concrete placement and compaction?: To ensure the structural integrity and durability of the concrete structure, it is essential to adhere to guidelines for safeguarding steel rebars during concrete placement and compaction. Here are some key guidelines to consider: 1. Covering and Support: Adequate coverage and support are necessary to shield rebars from corrosion and damage. The minimum cover requirements specified in the design or relevant standards must be met. Additionally, rebars should be positioned accurately, avoiding direct contact with the ground or formwork. 2. Cleanliness: Prior to concrete placement, thorough cleaning of rebars is crucial to eliminate rust, scale, dirt, or other contaminants. This can be achieved through wire brushing, sandblasting, or other appropriate methods. Clean rebars promote better bonding with the concrete and reduce the risk of corrosion. 3. Moisture Control: During concrete placement and compaction, rebars should remain dry. Excessive moisture, particularly in high humidity or chloride-exposed areas, can accelerate corrosion. To prevent moisture accumulation, proper drainage systems and the use of waterproofing membranes are recommended. 4. Spacing and Tying: Adequate spacing and tying of rebars are necessary to maintain the desired concrete cover and prevent displacement during placement and compaction. This ensures proper embedding of rebars in the concrete, providing the required structural strength. 5. Vibrating and Compaction: Care should be taken to avoid direct contact between the vibrator and rebars during concrete placement, as this can cause damage or displacement. Vibrating should be done carefully and gradually to ensure uniform and tight compaction of the concrete around the rebars. 6. Concrete Placement Techniques: Proper techniques for concrete placement should be followed to minimize the risk of rebar displacement. Gentle and even placement of concrete should be prioritized, avoiding excessive dropping or splashing that could displace rebars. Additionally, proper compaction and consolidation techniques should be employed to eliminate voids and fully encapsulate rebars. 7. Protection from External Factors: Rebars should be protected from environmental factors that can induce corrosion, such as moisture, chemicals, or aggressive soils. Adequate curing of the concrete is vital to prevent rapid drying or carbonation, which can lead to corrosion and reduced durability. By adhering to these guidelines, rebars can be effectively protected during concrete placement and compaction, ensuring the long-lasting and safe nature of the concrete structure. It is advisable to consult relevant design codes, specifications, and industry best practices for project-specific guidelines.

Q:How do steel rebars affect the flexibility of a concrete structure?: Steel rebars can greatly affect the flexibility of a concrete structure. Rebars, which are essentially steel bars inserted into concrete to provide reinforcement, enhance the structural strength and durability of the concrete. The presence of rebars increases the tensile strength of the concrete, making it more resistant to cracking and bending under external loads. By distributing the load across the entire structure, steel rebars help to prevent localized stress concentrations. This is particularly important in areas such as beams or columns, where large amounts of weight or pressure can be concentrated. The rebars act as a support system, effectively transferring the load to different parts of the structure, ensuring that the concrete can withstand the applied forces without failure. Additionally, steel rebars provide flexibility to the concrete structure by allowing for controlled cracking. Concrete is a brittle material and tends to crack under tensile stress. However, the presence of rebars helps to control and limit the size and extent of cracks that may occur. As the rebars absorb some of the tensile forces, they help to distribute the stress and prevent large cracks from forming. This enhances the overall flexibility of the structure, as controlled cracking allows for slight movements and deformation without compromising the structural integrity. In summary, steel rebars play a crucial role in enhancing the flexibility of a concrete structure. They provide reinforcement and increase the tensile strength of the concrete, preventing cracking and bending under external loads. The rebars also allow for controlled cracking, which helps to distribute stress and maintain the structural integrity of the concrete.

Q:Can steel rebars be used in the construction of residential buildings?: Steel rebars are indeed suitable for the construction of residential buildings due to their strength and durability. When it comes to reinforced concrete structures, steel rebars are commonly utilized. Within residential construction, their primary purpose is to reinforce concrete foundations, beams, columns, and slabs. This reinforcement provides added support and enhances the structural integrity of the building, allowing it to withstand various loads and forces. Steel rebars are preferred over alternative materials due to their high tensile strength, resistance to corrosion, and ability to withstand extreme weather conditions. Furthermore, they are readily available, cost-effective, and can be customized to meet specific building requirements. Consequently, steel rebars play a vital role in the construction of residential buildings, ensuring their long-lasting stability and safety.

Q:Can steel rebars be used in other construction materials apart from concrete?: Yes, steel rebars can be used in other construction materials apart from concrete. They can also be utilized in masonry structures, timber frames, and even in composite materials. The high strength and durability of steel rebars make them suitable for reinforcing various construction materials, enhancing their structural integrity and load-bearing capacity.

Q:Can steel rebars be used in high-rise building construction?: Yes, steel rebars can be used in high-rise building construction. Steel rebars are commonly used as reinforcement in concrete structures, including high-rise buildings, to provide strength and stability. The use of steel rebars helps distribute and withstand the load and stresses that such tall structures experience.

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 are steel rebars spliced or connected in construction joints?: In construction joints, steel rebars are typically spliced or connected using various methods to ensure the structural integrity and strength of the reinforced concrete. One common method is known as lap splicing, where the rebars are overlapped and then mechanically connected or tied together using steel wires or couplers. The length of the overlap required for lap splicing depends on the diameter of the rebars and the design specifications. It is usually specified in terms of the rebar diameter or as a multiple of it. The overlapping length ensures that the load transfer between the two rebars is efficient and prevents any potential failure at the connection point. Another method of splicing steel rebars is the use of mechanical couplers. These couplers are pre-fabricated devices that are designed to connect two rebars together securely. They eliminate the need for lap splicing and provide a more precise and reliable connection. Mechanical couplers are particularly useful in situations where the rebar size is larger or where it is not feasible to have long lap lengths. Additionally, in some cases, welded splicing may be used. This method involves welding the ends of the rebars together, creating a solid and continuous connection. Welded splicing is commonly used when the rebars are larger in diameter, and the joint needs to withstand higher loads. However, it is essential to ensure that proper welding techniques and practices are followed to maintain the integrity of the connection. Overall, the splicing or connection of steel rebars in construction joints is a critical aspect of reinforced concrete construction. It ensures that the rebars act as a continuous reinforcement, allowing the structure to resist applied loads effectively. The choice of splicing method depends on factors such as rebar size, design specifications, and project requirements.

Q:Can steel rebars be used for both residential and commercial construction?: Yes, steel rebars can be used for both residential and commercial construction. Steel rebars are commonly used as reinforcement in concrete structures to provide additional strength and stability. They are suitable for various construction projects, including residential buildings, commercial buildings, bridges, and infrastructure projects. The use of steel rebars ensures that the concrete structure can withstand heavy loads, seismic activity, and other external forces. Whether it is a small residential house or a large commercial complex, steel rebars are a reliable and commonly used material for reinforcing concrete structures in both residential and commercial construction.

Q:What is the difference between three - grade steel and two - grade steel?: Two grade steel thread subway project a little more, three grade steel room building project a little more. In addition, the original use of two steel more, and now are promoting the new three grade steel, concrete structure among the application has been very common. Three grade thread steel used in beam column main reinforcement is more, two grade thread steel used in more stirrups, recently, the state also issued expressly eliminated HRB335 two grade steel and HPB235 high wire.

Q:What are the guidelines for proper splicing of steel rebars in concrete structures?: Ensuring the structural integrity and safety of concrete structures requires strict adherence to guidelines for splicing steel rebars. The following are key guidelines to follow: 1. Lap Splicing Length: The overlapping distance between rebars, known as lap splicing length, must adhere to the design plans or structural codes. Typically, minimum lap lengths are specified as a multiple of rebar diameter, such as 40 times for tension members and 25 times for compression members. 2. Cleanliness: Prior to splicing, rebars must be thoroughly cleaned to remove rust, scale, dirt, and other contaminants. Proper cleaning guarantees a strong bond during splicing. 3. Proper Alignment: Rebars to be spliced should be aligned correctly to maintain reinforcement continuity. Misalignment can cause stress concentration and weaken the structure. The bars should be parallel, evenly spaced, and in a straight line. 4. Splice Type: Various splice connections, including lap splicing, mechanical splicing, and welded splicing, are available. The choice of splice type should consider project requirements, structural design, and local building codes. 5. Reinforcement Bar Preparation: Before splicing, rebars should be prepared by removing scale, rust, and other contaminants. This can be achieved through brushing, grinding, or shot blasting. Additionally, the bar ends must be clean and free of deformations or irregularities. 6. Testing and Inspection: Regular testing and inspection are crucial to ensure the quality and integrity of spliced rebars. Non-destructive testing methods like ultrasound or magnetic particle testing can be used to check bond strength and ensure correct splicing. 7. Adequate Cover: Spliced rebars require sufficient concrete cover to protect against corrosion and fire. The concrete cover thickness should comply with local building codes and design specifications. 8. Proper Grouting: When using mechanical splices, ensure proper grouting or filling of splice sleeves or couplers with approved non-shrink grout. This ensures full load transfer and prevents rebars from moving or slipping. 9. Documentation: All splicing activities should be thoroughly documented, including the splice type, lap lengths, inspection reports, and any deviations from the original design. This documentation is important for future reference, maintenance, and regulatory compliance. These guidelines serve as general recommendations, and project-specific requirements and local building codes must always be followed. Consulting a qualified structural engineer or reputable construction professional is vital to ensure the highest standards of safety and compliance.

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