Deformed bars in Grade HRB400/500 with Best Quality

Deformed bars in Grade HRB400/500 with Best Quality System 1

Deformed bars in Grade HRB400/500 with Best 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: How do steel rebars affect the overall longevity of a structure?: Steel rebars play a crucial role in enhancing the overall longevity and durability of a structure. These reinforced bars, made of high-strength steel, are strategically placed within concrete structures to provide strength, stability, and resistance against external forces. The primary function of steel rebars is to resist the tensile forces that concrete alone cannot bear. Concrete has good compressive strength but is weak in tension. By incorporating steel rebars into the concrete, the structure becomes significantly stronger and capable of withstanding various loads and stresses. The presence of rebars in a structure helps to distribute the applied load evenly throughout the structure, preventing localized cracking or failure. This ensures that the structure can withstand the weight of its own components, as well as any external loads such as wind, earthquakes, or heavy equipment. Steel rebars also play a crucial role in preventing the formation and propagation of cracks within the concrete. When exposed to environmental factors, such as temperature changes or moisture, concrete tends to expand and contract, leading to the development of cracks. However, the presence of rebars restrains the movement of the concrete, reducing the formation and size of cracks. This helps to maintain the structural integrity of the building over time, preventing further deterioration and extending its overall longevity. Moreover, steel rebars have high resistance to corrosion, which is a common problem in concrete structures exposed to harsh environments. The corrosion of rebars can lead to the development of rust, which weakens the steel and compromises the structure's strength. However, rebars are typically coated with materials such as epoxy or galvanized coatings, which act as a protective barrier against corrosion. This ensures that the rebars remain in good condition, maintaining their strength and contributing to the long-term durability of the structure. In conclusion, steel rebars are essential components in enhancing the overall longevity of a structure. By providing additional strength, distributing loads, preventing cracks, and resisting corrosion, rebars significantly improve the structural integrity and durability of concrete structures, ensuring their ability to withstand various forces and maintain their functionality over time.

Q: How do steel rebars affect the structural capacity of concrete beams and columns?: The role of steel rebars in enhancing the structural capacity of concrete beams and columns cannot be overstated. These rebars serve as reinforcement, providing added strength and durability to the concrete elements. When steel rebars are incorporated into the concrete, the load-bearing capacity of the beams and columns is significantly increased. One of the main functions of steel rebars is to counteract the tensile forces that concrete alone cannot withstand. Concrete is strong under compression but weak under tension, which makes it prone to cracking and failure when subjected to tensile stress. By integrating steel rebars into the concrete, the tensile strength of the reinforced element is greatly improved. The steel rebars act as a framework within the concrete, distributing the load more evenly and reducing the risk of localized failure. When external loads or forces are applied, the rebars bear the tensile stress while the concrete maintains its compressive strength. This combination of materials creates a reinforced concrete element that can handle heavier loads, thus increasing the structural capacity of the beams and columns. Moreover, steel rebars also enhance the ductility and flexibility of the concrete elements. This means that the reinforced beams and columns can undergo greater deformations before reaching failure. The ability to deform without breaking is particularly important in regions prone to earthquakes, as it allows the structure to absorb and dissipate energy, thereby minimizing the risk of collapse. Additionally, steel rebars improve the resistance of concrete beams and columns against shrinkage and thermal stresses. Concrete tends to shrink as it cures and expand and contract due to temperature variations. The presence of steel rebars helps minimize these effects by providing a reinforcing network that restrains the concrete from excessive movements, preventing cracks and preserving the overall structural integrity. In conclusion, steel rebars have a profound impact on the structural capacity of concrete beams and columns. They enhance tensile strength, improve ductility, reduce shrinkage and thermal stresses, and increase overall load-bearing capacity. The combination of concrete and steel reinforcement produces a significantly stronger and more durable structural element that can withstand higher loads, ensuring the stability and safety of the entire structure.

Q: What is the typical weight per meter of a steel rebar?: The weight per meter of a steel rebar may vary depending on its size and grade. Typically, a 10 mm mild steel rebar weighs approximately 0.616 kg/m. However, for larger sizes like a 20 mm rebar, the weight per meter can be around 2.47 kg/m. It should be noted that these values are approximate and may differ slightly based on manufacturing standards and regional regulations.

Q: How are steel rebars used in airport runway construction?: Steel rebars are used in airport runway construction to reinforce and strengthen the concrete pavement. They are placed within the concrete to provide additional support and prevent cracking or shifting of the runway surface under heavy aircraft loads.

Q: What are the guidelines for cutting and bending steel rebars on-site?: The guidelines for cutting and bending steel rebars on-site typically include using appropriate tools such as a rebar cutter and bender, ensuring safety measures such as wearing protective gear, following the required dimensions and angles specified in the construction plans, and using proper techniques to achieve clean and accurate cuts and bends. It is crucial to follow local building codes, manufacturer's instructions, and industry best practices to ensure structural integrity and worker safety.

Q: Can steel rebars be welded to other steel components?: Yes, steel rebars can be welded to other steel components. Welding is a common method used to join steel structures, including rebars, to create strong and durable connections.

Q: What are the guidelines for installing steel rebars in concrete columns?: To ensure the structural integrity and durability of concrete columns, there are several important considerations to be made when installing steel rebars. Here are some guidelines to follow: 1. Reinforcement design: Begin by creating a proper reinforcement design that specifies the rebars' size, length, and spacing. This design should be prepared by a qualified engineer or consultant, keeping in mind the load-bearing requirements of the column and the structural design standards. 2. Rebar preparation: Before installation, thoroughly clean the steel rebars to eliminate any rust, oil, or other contaminants that could hinder the bond between the rebar and the concrete. Additionally, cut and bend the rebars' ends correctly according to the reinforcement design. 3. Placement: Accurately position the rebars as specified in the reinforcement design. They should be placed in the center of the column and secured to maintain the required spacing and alignment. Avoid allowing the rebars to touch the formwork or be placed too close to the edges of the column. 4. Splicing: If the height of the column exceeds the length of the rebar, splicing becomes necessary. Follow approved methods such as lap splicing, mechanical couplers, or welded splices. Ensure the spliced rebars have sufficient overlap length and provide a continuous load path. 5. Tying: Properly tying the rebars is crucial to maintain their position during concrete pouring. Use binding wire or other approved tying methods to securely tie the rebars at the intersections. The ties should be tight enough to prevent displacement but not so tight as to damage the rebars. 6. Concrete pouring: Once the rebars are installed, pour the concrete into the formwork, completely surrounding the rebars. Take care to avoid segregation or honeycombing in the concrete, as this can compromise the bond between the rebars and the concrete. 7. Concrete cover: The reinforcement design will specify the required concrete cover over the rebars. This cover protects the rebars from corrosion and provides fire resistance. It is crucial to maintain the specified concrete cover throughout the height of the column and ensure it is not compromised during construction. 8. Quality control: Regularly inspect and implement quality control measures during the installation process. This includes checking the alignment, spacing, and cover of the reinforcement, as well as verifying the use of proper tying methods and splicing techniques. By following these guidelines, you can effectively install steel rebars in concrete columns, ensuring their structural strength and durability. Remember to adhere to local building codes and standards and seek professional advice if necessary to ensure the proper installation of rebars in concrete columns.

Q: What are the safety precautions when handling steel rebars?: When handling steel rebars, it is important to follow several safety precautions. Firstly, always wear appropriate personal protective equipment (PPE) such as gloves, goggles, and steel-toed boots to protect yourself from potential injuries. Secondly, ensure that the work area is clear of any debris or obstacles that may cause trips or falls. Additionally, use proper lifting techniques and team lifting when necessary to avoid strain or back injuries. It is crucial to be aware of the weight and length of the rebars being handled to prevent them from falling or causing accidents. Lastly, remember to store and stack the rebars securely to prevent them from toppling over and causing injuries.

Q: How do steel rebars affect the overall sustainability of bridge constructions?: Steel rebars play a crucial role in enhancing the overall sustainability of bridge constructions. By reinforcing the concrete structure, steel rebars improve the durability and strength of the bridge, allowing it to withstand heavy loads and harsh environmental conditions for an extended period. This increased lifespan reduces the need for frequent repairs or replacements, thereby minimizing resource consumption and waste generation. Additionally, steel rebars can be recycled at the end of their life cycle, reducing the environmental impact associated with their production. Hence, the use of steel rebars contributes to the long-term sustainability of bridge constructions.

Q: Are steel rebars susceptible to corrosion?: Yes, steel rebars are susceptible to corrosion. Corrosion is a natural process that occurs when steel is exposed to moisture, oxygen, and other environmental factors. When steel rebars are used in concrete structures, they are exposed to the elements and can come in contact with water or moisture, which can lead to the formation of rust. This rust can weaken the rebars and eventually compromise the structural integrity of the concrete. To prevent corrosion, various protective measures can be taken, such as applying a protective coating or using corrosion-resistant steel rebars. Regular maintenance and inspection of the concrete structures are also crucial to detect and address any signs of corrosion in a timely manner.

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