Hot rolled high quality deformed bar ASTM A615 GR40

Hot rolled high quality deformed bar ASTM A615 GR40 System 1

Hot rolled high quality deformed bar ASTM A615 GR40

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Loading Port:: Qingdao

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 m.t./month

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Deformed Bar Details：

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

Steel Rebar / Deformed Bar / Reinforcing Bar

Q: What is the process of reinforcing concrete walls with steel rebars?: The process of reinforcing concrete walls with steel rebars involves several steps. First, the design and placement of rebars are determined based on the structural requirements. Then, the concrete wall is prepared by cleaning and ensuring a strong bond with the rebars. Next, the rebars are cut and bent according to the specified dimensions and patterns. These rebars are then placed in the desired positions within the formwork, ensuring proper spacing and alignment. Once the rebars are in place, the concrete is poured, encapsulating the rebars and forming a solid structure. The concrete is allowed to cure and harden, creating a reinforced concrete wall that is stronger and more resistant to cracking or structural failure.

Q: Do l 8, three grade steel have discs?: If small specifications or hot rolled straight line, the cost is high, not to say, production is still low, the general steel mills in order to produce the production of discoid small threads, and then according to the needs of the use of mechanical processing into a straight bar shape

Q: How do steel rebars affect the overall structural stability of a building?: Steel rebars play a critical role in enhancing the overall structural stability of a building. These reinforcing bars are commonly used in concrete structures to provide additional strength and support to the building's framework. By embedding steel rebars within the concrete, the overall structural integrity and load-bearing capacity of the building are significantly increased. The primary function of steel rebars is to reinforce and strengthen the concrete, which is vulnerable to tension forces. Concrete has excellent compressive strength but has limited resistance to tensile forces. Steel rebars, being highly tensile in nature, are able to counteract these tension forces and prevent the concrete from cracking or failing under stress. Rebars are strategically placed within the concrete to distribute and transfer loads more efficiently. This redistribution of forces helps to reduce the chances of localized structural failures and ensures that the building can withstand various external forces, such as wind, seismic activity, or heavy loads. Moreover, steel rebars also enhance the durability and longevity of a building. By reinforcing the concrete, rebars help to minimize cracking and prevent the propagation of cracks. This is particularly crucial in areas prone to seismic activity, as the rebars can absorb and dissipate the energy generated during an earthquake, reducing the risk of collapse. In addition to their role in ensuring structural stability, steel rebars also offer flexibility in design. They can be shaped and bent into various configurations, allowing architects and engineers to create complex and innovative structures with ease. This flexibility in design not only improves the aesthetics of the building but also enables the construction of unique architectural features that would otherwise be challenging or impossible to achieve. In summary, steel rebars are essential for enhancing the overall structural stability of a building. By reinforcing the concrete, they increase its load-bearing capacity, improve resistance to tensile forces, and distribute loads more efficiently. Their presence significantly reduces the risk of structural failure, enhances durability, and allows for greater design flexibility.

Q: What are the guidelines for spacing and positioning steel rebars in concrete structures?: To ensure the structural integrity and durability of concrete structures, it is critical to adhere to guidelines for spacing and positioning steel rebars. Consider the following key guidelines: 1. Rebar Spacing: The spacing of steel rebars is determined by the structural engineer or designer and is typically expressed in terms of center-to-center spacing or clear distance between rebars. It is dependent on load requirements, concrete strength, and project-specific factors. Common spacing ranges from 4 to 12 inches. 2. Cover Depth: Concrete cover depth refers to the distance between the concrete's outer surface and the nearest rebar surface. Sufficient cover is essential to protect rebars from environmental factors like corrosion and fire. The cover depth varies based on exposure conditions and is specified in the project's design. 3. Rebar Positioning: Proper positioning of rebars is crucial to ensure they are placed accurately within the concrete structure. During concrete pouring, rebars should be securely supported and maintained in the correct alignment. Specific positioning requirements may include lap lengths, overlaps, or hooking at junctions for proper load transfer and structural continuity. 4. Chair Supports: To maintain correct spacing and elevation, rebar chair supports are widely used. These supports are placed beneath rebars at regular intervals to prevent sagging or displacement during concrete placement. The appropriate support type and height depend on project requirements and rebar diameter. 5. Tying and Binding: Appropriate tying and binding of rebars are essential to maintain their position and spacing during concrete pouring. Rebars should be securely tied using wire or rebar ties at suitable intervals, typically every 12-18 inches. The ties must be tight enough to prevent movement but not excessively tight to avoid damaging rebars or causing concrete segregation. 6. Concrete Consolidation: Proper consolidation of concrete around rebars is crucial to eliminate air voids and ensure proper bonding between the concrete and rebars. Vibrators or other consolidation techniques should be utilized to achieve proper compaction and thorough embedding of rebars in the concrete. Adherence to guidelines for spacing and positioning steel rebars in concrete structures is vital for ensuring the construction's structural strength, durability, and safety. It is essential to consult and follow the project's design specifications and engage qualified professionals to guarantee proper execution and adherence to these guidelines.

Q: What are the different types of steel rebars used in airport construction?: To ensure the durability and structural integrity of airport infrastructure, a variety of steel rebars are utilized in airport construction. Airport construction commonly employs the following types of steel rebars: 1. Mild Steel Rebars: These rebars, made from carbon steel with a smooth surface, are the fundamental and widely used reinforcement in airport construction. They provide general reinforcement and are applicable to airport runways, taxiways, and aprons. 2. High Strength Deformed (HSD) Steel Rebars: HSD rebars undergo a heat treatment process, enhancing their strength and ductility. These rebars have ribbed surfaces that adhere better to concrete, making them ideal for critical structural elements like beams, columns, and foundations in airport construction. 3. Epoxy-Coated Rebars: For environments prone to corrosion, epoxy-coated rebars are employed. These rebars have an epoxy resin coating that shields the steel from moisture and chemicals in concrete. Epoxy-coated rebars are frequently used in airport construction, particularly in areas exposed to corrosive substances and de-icing salts. 4. Stainless Steel Rebars: Stainless steel rebars possess excellent corrosion resistance and are commonly utilized in coastal airports or high-humidity regions. They are especially suitable for reinforcing concrete structures in airport terminals, hangars, and other areas where durability and aesthetics are crucial. 5. Galvanized Rebars: Galvanized rebars are coated with a layer of zinc to protect against corrosion. They are commonly used in areas with high moisture content or where concrete is exposed to harsh weather conditions. In airport construction, galvanized rebars reinforce structures such as retaining walls, drainage systems, and other external components. 6. Welded Wire Fabric (WWF): WWF consists of parallel and perpendicular steel wires welded to form a mesh-like structure. This rebar type is employed in airport construction for concrete slabs, pavements, and large surface areas. WWF ensures uniform reinforcement and even distribution of loads across the structure. It is essential to consider specific factors such as application, structural requirements, environmental conditions, and local building codes when selecting steel rebars for airport construction. Consulting with structural engineers and construction professionals is crucial to determine the most suitable type of steel rebar for each application in airport construction projects.

Q: How do steel rebars help in load distribution within a structure?: Steel rebars, also referred to as reinforcing bars, are essential for the distribution of loads within a structure. They are extensively utilized in concrete structures, like buildings, bridges, and highways, to enhance their strength and durability. The main objective of steel rebars is to provide tensile strength to the concrete. While concrete is highly capable of withstanding compression, it is relatively frail when it comes to tension. Any structure exposed to loads, whether from the weight of the building itself or external forces, will encounter both compression and tension forces. By incorporating steel rebars into the concrete, they act as reinforcements and resist tensile forces. When an external load is applied to the structure, the rebars bear a significant portion of the generated tension forces. This prevents the concrete from cracking or failing under the applied load. Furthermore, steel rebars aid in the distribution of the load throughout the structure. When a load is imposed on a structure, it generates stress that is spread across the various components. The presence of rebars enables a more uniform distribution of these stresses, reducing the concentration of forces in specific areas. This prevents localized failures and ensures that the load is evenly dispersed across the structure, thereby improving its overall strength and stability. Another crucial aspect of steel rebars is their capacity to bond with concrete. The rough surface of the rebars prevents them from slipping or separating from the concrete, ensuring a robust bond between the two materials. This bond further enhances the distribution of loads by enabling the rebars to effectively transfer the tensile forces to the surrounding concrete. In conclusion, steel rebars play a critical role in the distribution of loads within a structure. They furnish the necessary tensile strength to withstand tension forces, distribute the load evenly across the structure, and bond with the concrete, guaranteeing a sturdy and stable construction. Without steel rebars, concrete structures would be considerably weaker and more prone to cracking or failure under load.

Q: Can steel rebars be used in the construction of sound barriers and noise walls?: Yes, steel rebars can be used in the construction of sound barriers and noise walls. Steel rebars are commonly used as reinforcement in concrete structures, which are often used to build sound barriers and noise walls. They provide strength, durability, and structural integrity to these barriers, ensuring they can effectively reduce noise pollution.

Q: Can steel rebars be used in structures with high aesthetic requirements?: Indeed, structures with high aesthetic standards can make use of steel rebars. Although steel rebars are mainly employed for their robustness and longevity, they can also be fashioned and integrated in a manner that satisfies aesthetic necessities. Rebars have the potential to be molded, curved, or even coated to align with the desired visual appeal of the structure. Furthermore, they can be concealed within the framework or concealed under alternate materials to preserve a pristine and visually captivating facade. Through meticulous forethought and design, steel rebars can be effectively employed in structures with demanding aesthetic prerequisites without compromising their functionality or visual allure.

Q: What is the difference between steel rebars and steel mesh?: Concrete structures in construction projects commonly use steel rebars and steel mesh to reinforce them. However, there are notable distinctions regarding their design and application. Steel rebars, also called reinforcing bars, are lengthy cylindrical steel rods. They are typically employed to provide tensile strength to concrete structures. These rebars are usually arranged in a grid-like pattern within the concrete, preventing cracks and improving the overall structural integrity. Rebars come in various sizes and are used in applications where significant tensile force is anticipated, such as columns, beams, and slabs. On the other hand, steel mesh, also known as wire mesh or welded wire fabric, consists of interconnected steel wires that are welded together to create a grid-like pattern. This mesh is usually produced in large rolls and can be easily cut or bent into the desired shape. Steel mesh primarily offers both tensile and shear strength to concrete structures. It is commonly used in applications where a lower amount of tensile force is expected, like walls, foundations, and pavements. Regarding installation, steel rebars are usually placed and secured within the concrete formwork prior to pouring the concrete. They are positioned at specific locations according to the structural design requirements. Conversely, steel mesh is laid on top of the formwork or within the concrete pour itself, providing reinforcement throughout the entire concrete structure. Both steel rebars and steel mesh possess their own advantages and disadvantages. Rebars provide greater tensile strength and are excellent for applications involving heavy loads or high amounts of force. However, they can be more time-consuming and labor-intensive to install due to the individual placement and tying process. On the other hand, steel mesh offers easier and faster installation due to its continuous form, making it more commonly used in smaller-scale projects or applications with lighter loads. In conclusion, while both steel rebars and steel mesh serve the purpose of reinforcing concrete structures, they differ in terms of design, installation method, and application. The choice between rebars and mesh depends on specific structural requirements, project scale, and load expectations. It is advisable to consult with a structural engineer or construction professional to determine the most suitable reinforcement solution for a particular project.

Q: How do steel rebars affect the overall maintenance requirements of concrete structures?: Steel rebars play a crucial role in the overall maintenance requirements of concrete structures. These reinforcing bars are used to enhance the strength and durability of concrete by providing tensile strength and preventing cracks. By adding steel rebars to concrete, the structure becomes better equipped to resist the forces that it may encounter during its lifespan. One of the primary ways that steel rebars affect maintenance requirements is by reducing the likelihood of cracks in concrete structures. Concrete on its own is strong in compression but weak in tension. When subjected to tensile forces, such as loads or temperature fluctuations, concrete tends to crack. However, by incorporating steel rebars within the concrete, these cracks are minimized or prevented altogether. This is because the steel rebars absorb the tensile forces, allowing the concrete to remain intact and intact structures require less maintenance. Furthermore, steel rebars also increase the overall strength of concrete structures, making them more resistant to external forces. This added strength reduces the chances of structural failure, thereby decreasing the maintenance requirements in terms of repairs or replacements. Additionally, the use of steel rebars can extend the lifespan of concrete structures, as they provide the necessary reinforcement to withstand the test of time. However, it is essential to note that steel rebars can also be susceptible to corrosion over time, which can impact the maintenance requirements of concrete structures. When steel rebars corrode, they expand, causing cracks and spalling in the concrete. This corrosion can be accelerated by various factors such as exposure to moisture, chloride ions, or carbonation. Therefore, regular inspections and maintenance measures, such as protective coatings or cathodic protection, must be implemented to prevent or manage the corrosion of steel rebars. In conclusion, steel rebars have a significant impact on the overall maintenance requirements of concrete structures. They enhance the strength, durability, and resistance of concrete, reducing the occurrence of cracks and structural failures. However, proper maintenance and protection against corrosion are necessary to ensure the continued effectiveness of steel rebars, ultimately contributing to the longevity and low maintenance needs of concrete structures.

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