High quality deformed bars with grade HRB400

High quality deformed bars with grade HRB400 System 1

High 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

High 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:Why can not the finish thread steel be welded?: Finish rolling thread steel can be directly connected with sleeve, and do not use wire; you want to weld can also, it is estimated that the user does not require welding, welding prone to appear strong phenomenon. If welding is used, buy the finish steel, which is more expensive than the other threads of the performance.

Q:What are the guidelines for the proper lap splicing of steel rebars?: Here are different grammar and expressions for the given guidelines: 1. Lap Length: To achieve the proper overlapping of rebars, a minimum distance, known as the lap length, must be maintained. This distance is determined based on factors such as bar diameter, strength, and the type of structure. Engineering codes and standards generally specify the required lap lengths. 2. Cleanliness: Before commencing lap splicing, it is crucial to ensure that the rebars are free from any dirt, rust, oil, or other contaminants. The presence of foreign materials on the rebar surface can impede the bond between the overlapping bars. 3. Alignment: The rebars intended for splicing must be accurately aligned and parallel to each other. Any misalignment can result in a weak splice, compromising the structural integrity of the construction. 4. Overlapping: The length of overlap between the rebars should be sufficient to transfer loads effectively and maintain reinforcement continuity. It is imperative to adhere to the specified lap length to achieve the required strength and performance of the reinforced concrete structure. 5. Splice Configuration: The choice of lap splice configuration depends on the structural requirements and the specific design of the project. Commonly used configurations include end-to-end splicing, staggered splicing, and mechanical splices. The selection of the appropriate configuration should comply with relevant codes and standards. 6. Splice Preparation: Thorough cleaning and preparation of the rebars at the lap splice area are necessary. This involves removing any loose rust or scale from the bar surface and ensuring adequate bond length between the bars. 7. Lap Splice Placement: The lap splice should be positioned at the designated location within the concrete member. It is crucial to avoid placing the splice too close to the edge of the concrete element, as this may reduce the cover depth and impact the structure's durability. 8. Splice Length Variations: In situations where achieving the required lap length is not feasible due to space limitations or other restrictions, alternative methods such as mechanical splices or welded splices can be considered. However, it is essential to consult the project engineer or designer to ensure compliance with the appropriate guidelines. 9. Quality Control: The lap splicing process should be subject to proper quality control measures. This includes monitoring the lap splice length, ensuring accurate alignment, and conducting periodic inspections to identify any defects or deficiencies. It is important to note that the above guidelines serve as general recommendations, and the specific requirements for lap splicing may vary depending on the design specifications, construction codes, and local regulations. Therefore, it is always advisable to consult the project engineer or designer for precise guidelines applicable to a particular project.

Q:What is the process of bending steel rebars into shapes other than straight bars?: The process of bending steel rebars into shapes other than straight bars typically involves using specialized machinery, such as a rebar bending machine or a hydraulic bender. The rebars are placed in the machine, which applies force to bend them into the desired shape. The operator may follow blueprints or use templates to ensure accurate bending. This process is commonly used in construction and concrete reinforcement projects to create custom shapes that fit specific architectural or structural requirements.

Q:14 screw steel 1 meters multiple?: The performance of classification (class), for example, China's current implementation of standards, (G B1499.2-2007) for steel wire for 1499.1-2008), according to the strength (tensile strength yield point / steel) will be divided into 3 levels; the Japanese industrial standard (JI SG3112), according to the comprehensive performance will be divided into thread steel 5 species; the British Standard (BS4461), also provides some level of performance test of thread steel. In addition, the thread steel can be classified according to the use, such as reinforced concrete, ordinary steel bars and reinforced concrete bars for heat treatment.

Q:Can steel rebars be used in structures with limited accessibility?: Indeed, structures with limited accessibility can utilize steel rebars. These rebars are frequently employed in reinforced concrete structures for their ability to enhance strength and durability. They possess versatility, enabling effortless transportation and installation, even in regions with restricted access. Under such circumstances, steel rebars can be conveniently cut, bent, and assembled on-site to precisely accommodate the structure's specific requirements. Furthermore, steel rebars can be prefabricated off-site and subsequently transported to the construction site, facilitating simpler handling and installation in areas with restricted entry. Consequently, steel rebars emerge as a fitting choice for structures located in remote areas or regions with limited available space.

Q:What is the effect of improper handling on the quality of steel rebars?: Improper handling can have a significant detrimental effect on the quality of steel rebars. It can lead to various issues such as surface damage, corrosion, bending or deformation, and even structural failure. Improper handling can introduce scratches, dents, or other forms of physical damage, compromising the rebar's integrity and strength. Additionally, exposure to moisture or corrosive substances due to mishandling can accelerate corrosion, reducing the rebars' lifespan and undermining their structural performance. Moreover, mishandling during transportation or storage can result in bending or deformation, rendering the rebars unsuitable for their intended application. Therefore, proper handling practices are crucial to preserving the quality and reliability of steel rebars.

Q:Are steel rebars resistant to termites and other pests?: No, steel rebars are not resistant to termites and other pests.

Q:Are there any standards or specifications for steel rebars?: Yes, there are several standards and specifications for steel rebars. The most widely recognized standards for steel rebars include ASTM A615/A615M, ASTM A706/A706M, and BS 4449:2005+A2:2009. These standards provide guidelines on the composition, mechanical properties, dimensions, and tolerances of steel rebars, ensuring their quality and performance in construction applications. The standards also cover requirements for testing, marking, and certification of steel rebars to ensure compliance with industry standards and regulations.

Q:What are the different methods for cutting steel rebars on-site?: Cutting steel rebars on-site can be achieved using various methods, which depend on the specific project requirements and limitations. The following are some commonly used techniques: 1. For smaller projects or areas where power tools are inaccessible, manual cutting proves to be a suitable method. Handheld manual tools like rebar cutters or bolt cutters are utilized to cut through the steel rebars. 2. Abrasive cutting, also known as grinding or cut-off saws, employs a high-speed rotating disc with abrasive particles that grind through the steel rebars. This method is effective for cutting rebars of different sizes and is frequently employed on construction sites. 3. Torch cutting involves the use of oxy-fuel or plasma torches. The method entails heating the steel rebars to a high temperature and then cutting through them using the intense heat. Torch cutting is ideal for thicker and larger rebars, although caution and safety measures must be observed due to the open flame involved. 4. Shear cutting utilizes hydraulic or mechanical shears to cut through the steel rebars. It is an efficient method for quickly and accurately cutting rebars, particularly for larger projects. 5. Hydraulic cutting involves the use of hydraulic pumps to generate high pressure, which is then utilized to power the cutting blade. This method is commonly employed for heavy-duty cutting tasks and can easily cut through thick rebars. 6. Electric cutting is achieved using electric cutters, such as electric rebar cutters or portable band saws. These tools are powered by electricity and provide a clean and precise cut. They are commonly utilized on construction sites where power is readily available. When selecting the appropriate method for cutting steel rebars on-site, it is crucial to consider the specific project requirements, including the size and thickness of the rebars, available power sources, and safety considerations.

Q:What are the factors that can cause corrosion in steel rebars?: The corrosion of steel rebars can be influenced by several factors. Firstly, the exposure to moisture and oxygen is a significant contributor to the corrosion process. When the steel rebar's surface comes into contact with moisture, it triggers an electrochemical reaction with the oxygen in the air, resulting in the formation of rust. This reaction is sped up in environments with high humidity or continuous water exposure, like coastal areas or submerged structures. Another factor that can cause corrosion is the presence of chloride ions. These can be found in seawater, deicing salts, or industrial environments, and they can penetrate the protective oxide layer on the steel rebar, making it more susceptible to corrosion. Once the chloride ions reach the metal surface, they break down the passive film, which allows the corrosion process to happen more quickly. The pH level of the environment is also crucial. Steel rebars are more prone to corrosion in highly acidic or alkaline conditions. Acidic environments, such as those in industrial areas with high air pollution or chemical exposure, can corrode the steel rapidly. Conversely, alkaline conditions, often found in concrete structures due to the presence of cement, can create a highly alkaline environment on the rebar's surface, leading to the breakdown of the protective oxide layer and promoting corrosion. Additionally, the presence of other impurities or contaminants can accelerate the corrosion process. For example, sulfur compounds can react with the steel rebar, forming sulfide corrosion products that weaken the structure. Similarly, exposure to certain organic compounds or acids can also contribute to corrosion. Lastly, the design and maintenance of structures can also play a role in the corrosion of steel rebars. Inadequate concrete cover or poor quality concrete can make it easier for moisture and oxygen to reach the steel, increasing the chances of corrosion. Lack of proper maintenance, such as neglecting to repair cracked or damaged concrete, can also lead to water infiltration and subsequent corrosion of the rebars. In conclusion, factors like moisture and oxygen exposure, chloride ions, pH level, presence of contaminants, and insufficient design or maintenance can all contribute to the corrosion of steel rebars. It is vital to understand and address these factors to ensure the longevity and durability of structures that incorporate steel rebars.

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