High quality deformed bar 6mm-50mm BS4449

High quality deformed bar 6mm-50mm BS4449 System 1

High quality deformed bar 6mm-50mm BS4449

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 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: Are steel rebars susceptible to rust?: Yes, steel rebars are susceptible to rust. Rebars are typically made of carbon steel, which contains iron. When exposed to moisture and oxygen, iron reacts to form iron oxide, commonly known as rust. This process is accelerated in the presence of salt or other corrosive substances. Rust formation weakens the rebars and can eventually lead to structural damage if left untreated. Therefore, it is crucial to protect steel rebars by applying an appropriate coating or using other corrosion prevention methods to ensure the longevity and structural integrity of reinforced concrete structures.

Q: What is the difference between hot-rolled and cold-worked steel rebars?: Hot-rolled steel rebars are produced by heating the steel billet to high temperatures and then passing it through rollers to shape and form it. This process results in rebars with a rough surface and varying dimensions. On the other hand, cold-worked steel rebars are produced by subjecting the hot-rolled rebars to a process called cold working, which involves further shaping and sizing by passing them through dies or rollers at room temperature. This process results in rebars with a smoother surface, tighter dimensional tolerances, and increased strength.

Q: Can steel rebars be replaced with other reinforcement materials?: Yes, steel rebars can be replaced with other reinforcement materials. While steel rebars have been widely used in construction for their strength and durability, alternative materials have been developed that offer similar or even improved properties. One such alternative is fiber-reinforced polymer (FRP) bars, which are made of high-strength fibers embedded in a polymer matrix. FRP bars are lightweight, corrosion-resistant, and have a high tensile strength, making them an attractive replacement for steel rebars. They are also non-conductive and non-magnetic, making them suitable for use in areas with electromagnetic interference or in sensitive industries such as electronics. Another alternative is carbon fiber reinforced polymer (CFRP) bars, which are similar to FRP bars but are specifically reinforced with carbon fibers. CFRP bars offer even higher tensile strength and stiffness compared to steel rebars, making them particularly suitable for structures that require exceptional load-bearing capabilities. Furthermore, natural fiber reinforced composites (NFRC) have also been explored as a replacement for steel rebars. NFRC can be made from materials such as bamboo, jute, or sisal fibers embedded in a matrix material like cement or polymer. These natural fibers offer good tensile strength and can be a sustainable and cost-effective alternative to steel rebars, especially in regions where these fibers are abundantly available. In conclusion, while steel rebars have been the traditional choice for reinforcement materials in construction, alternatives such as FRP bars, CFRP bars, and NFRC can be viable substitutes. The choice of reinforcement material depends on various factors such as structural requirements, environmental conditions, and cost-effectiveness.

Q: What are the challenges associated with the installation of steel rebars?: The installation of steel rebars presents numerous challenges. Firstly, the weight of the rebars can pose a significant obstacle. These heavy structures may require the use of heavy machinery or manual labor to lift and maneuver them into position, potentially endangering workers' safety and demanding additional time and resources for proper installation. Secondly, accurately placing the rebars can be a complex task, particularly in intricate or complicated structures. Achieving precise positioning according to design and structural requirements proves challenging in areas with limited accessibility or congested reinforcement zones. Skilled labor and careful coordination with other trades involved in the construction process are necessary. Another challenge relates to protecting the rebars from corrosion. When exposed to moisture and environmental chemicals, steel rebars are prone to corrosion. Consequently, appropriate measures must be implemented to ensure adequate corrosion protection, such as applying protective coatings or ensuring sufficient concrete cover. This adds complexity to the installation process. Additionally, seamless integration between different construction teams is crucial in rebar installation. Properly integrating the rebars with other structural elements like columns, beams, and walls requires effective communication and collaboration among the design team, steel fabricators, and construction teams. Failure to achieve such coordination may result in conflicts or delays. Furthermore, working at heights or in confined spaces poses additional challenges in terms of safety and accessibility during rebar installation. To mitigate associated risks, it is imperative to implement adequate safety measures, including scaffolding, harnesses, and providing workers with appropriate training. Lastly, the cost of steel rebars can be a challenge, particularly when facing budgetary constraints. As a significant component of the construction process, the cost of rebars may fluctuate due to market conditions or availability. Consequently, project managers must meticulously plan and budget for rebar installation to avoid unexpected cost overruns. In conclusion, the installation of steel rebars presents a multitude of challenges, encompassing the weight of the rebars, accurate placement, corrosion protection, coordination with other trades, working at heights or in confined spaces, and cost considerations. Addressing these challenges necessitates skilled labor, thorough planning, effective communication, and adherence to safety protocols.

Q: What are the different types of steel rebars used in tunneling?: There are several types of steel rebars commonly used in tunneling, including deformed steel bars, epoxy-coated rebars, stainless steel rebars, and galvanized rebars. Each type offers specific advantages such as improved corrosion resistance, enhanced bond strength, or increased durability, allowing engineers to choose the most suitable option based on the project requirements and site conditions.

Q: What are the advantages of using high-strength steel rebars?: There are several advantages of using high-strength steel rebars. Firstly, they have a higher tensile strength compared to regular steel rebars, which means they can withstand higher loads and stresses without breaking. This makes them ideal for construction projects that require reinforced concrete structures to bear heavy loads or withstand seismic activity. Secondly, high-strength steel rebars have a smaller diameter compared to regular rebars with equivalent strength. This allows for more efficient use of concrete, as less of it is needed to cover the rebars. Additionally, the smaller diameter makes them easier to handle and install, reducing construction time and labor costs. Lastly, high-strength steel rebars offer increased durability and longevity. They have better resistance to corrosion, which is a common problem in reinforced concrete structures. This ensures the longevity and structural integrity of the construction, reducing maintenance and repair costs in the long run. Overall, the advantages of using high-strength steel rebars include enhanced load-bearing capacity, improved efficiency in construction, and increased durability, making them a preferred choice for various construction projects.

Q: How are steel rebars used in the construction of water treatment plants?: Steel rebars are commonly used in the construction of water treatment plants to reinforce concrete structures such as tanks, pipelines, and basins. These rebars provide additional strength and durability to the concrete, allowing it to withstand the harsh operating conditions and the weight of water storage and treatment equipment.

Q: What is the impact of steel rebars on the constructability of a project?: Steel rebars have a significant impact on the constructability of a project. These reinforcement bars play a crucial role in strengthening and providing structural integrity to concrete structures. By incorporating steel rebars, the overall strength, durability, and resilience of a construction project are greatly improved. One of the key impacts of using steel rebars is the increased load-bearing capacity of the structure. Rebars are designed to withstand tension, which complements the concrete's ability to resist compression. This combination enhances the structural strength of the project, enabling it to withstand heavy loads and external forces, such as earthquakes or high winds. Moreover, steel rebars also enhance the ductility of the concrete structure. Ductility refers to the material's ability to deform without breaking. By adding rebars, the concrete becomes more flexible, allowing it to absorb energy and deform under stress before reaching its breaking point. This is particularly important in areas prone to seismic activities, as it helps prevent sudden and catastrophic failure of the structure. Another aspect of constructability impacted by steel rebars is the overall lifespan of the project. The corrosion resistance properties of rebars, especially when coated or galvanized, significantly extend the lifespan of the structure. This is particularly relevant in environments with high humidity, coastal areas, or regions with harsh weather conditions. By preventing corrosion and maintaining the integrity of the rebars, the entire project's longevity and durability are greatly enhanced. Additionally, steel rebars also facilitate the construction process itself. Their availability in various lengths, shapes, and sizes allows for flexible and efficient design and construction. Contractors can easily cut, bend, and shape rebars to fit specific project requirements, reducing construction time and costs. Moreover, rebars can be prefabricated off-site, minimizing on-site labor and simplifying the construction process. In conclusion, the impact of steel rebars on the constructability of a project is highly significant. They improve the overall strength, load-bearing capacity, ductility, and lifespan of the structure. Additionally, the flexibility and ease of use of steel rebars contribute to efficient construction practices. Therefore, incorporating steel rebars into a project is essential for ensuring its structural integrity and long-term success.

Q: What are the guidelines for the proper curing of concrete with steel rebars?: The proper curing of concrete with steel rebars requires adherence to the following guidelines: 1. Moisture: To ensure proper hydration and strength development, it is necessary to maintain moisture during the curing process. However, excessive moisture should be avoided when curing concrete with steel rebars to prevent corrosion and damage. Therefore, it is important to strike a balance between providing sufficient moisture and preventing the accumulation of standing water around the rebars. 2. Covering: During the pouring process, it is crucial to adequately cover the steel rebars with concrete to protect against corrosion. The thickness of the cover should meet the design specifications to ensure adequate strength and durability. 3. Curing time: The curing time for concrete with steel rebars is typically longer than that of plain concrete. This is due to the need for the steel to bond with the concrete and achieve proper adhesion. The recommended curing period may vary depending on factors such as ambient temperature, humidity, and the specific type of steel used. It is important to refer to the project specifications or consult with a structural engineer to determine the appropriate curing time for the specific application. 4. Temperature control: Temperature control is essential during the curing process to ensure uniform hydration and prevent thermal stress. Rapid temperature changes can lead to cracking and compromise the integrity of the concrete. Therefore, it is important to protect the concrete from extreme temperature variations and provide insulation or shading as necessary. 5. Protection from external elements: Concrete with steel rebars must be safeguarded against external elements that can cause damage or corrosion. This includes protection from chloride ions, carbonation, and chemicals. Additional protection can be provided by applying suitable surface coatings or sealants. 6. Inspection and maintenance: Regular inspection and maintenance are vital for ensuring the long-term durability of concrete with steel rebars. It is important to monitor for signs of corrosion, cracking, or deterioration and take appropriate action promptly. This may involve repairing damaged areas, applying protective coatings, or implementing measures to prevent corrosion. By following these guidelines, the proper curing of concrete with steel rebars can be achieved, resulting in a construction material that is structurally sound and durable, capable of withstanding the test of time.

Q: What is the purpose of ribbing on a steel rebar?: The purpose of ribbing on a steel rebar is to improve the bond between the rebar and the surrounding concrete. Raised deformations, known as ribs, run along the length of the rebar, creating a larger surface area for the concrete to grip onto. This larger surface area enhances the mechanical interlock between the rebar and concrete, resulting in better load transfer and improved structural integrity. Additionally, the ribbing prevents slippage or movement of the rebar within the concrete, ensuring that the reinforcement remains in its intended position, even under heavy loads or seismic activity. In summary, the ribbing on a steel rebar is vital for enhancing the performance and durability of reinforced concrete structures.

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