HRB400 deformed bars with competitive price

HRB400 deformed bars with competitive price System 1

HRB400 deformed bars with competitive price

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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

HRB400 deformed bars with competitive price

*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: How do steel rebars contribute to the fire resistance of concrete?: Concrete's fire resistance is enhanced by steel rebars in several ways. Firstly, steel rebars possess a non-combustible nature and a high melting point, ensuring they do not burn or add fuel to fires. This characteristic aids in preventing the spread of fire and maintaining the concrete's structural stability during fire incidents. Additionally, steel rebars act as reinforcement within the concrete, boosting its overall strength and load-bearing capacity. This reinforcement effectively prevents cracking or fragmentation of the concrete under high temperatures caused by fire. The presence of steel rebars also enhances the concrete's ductility, enabling it to deform and absorb energy during fires, rather than abruptly shattering or collapsing. Moreover, steel's thermal conductivity surpasses that of concrete, enabling it to effectively conduct heat away from the fire zone. This assists in dissipating heat and preventing it from reaching critical levels that could compromise the concrete's structural integrity. By absorbing and distributing heat, steel rebars contribute to slowing down the temperature rise within the concrete during fires. In conclusion, steel rebars contribute to concrete's fire resistance by providing structural stability, improving strength and load-bearing capacity, enhancing ductility, and dissipating heat. These attributes make concrete structures reinforced with steel rebars more resilient, enabling them to withstand fires for extended periods. As a result, the safety of occupants is increased, and potential property damage is reduced.

Q: What is the effect of steel rebars on the formwork design?: The formwork design in construction projects is significantly impacted by steel rebars. These reinforcement bars, also known as rebars, play a crucial role in providing strength and stability to concrete structures. One important aspect influenced by steel rebars in formwork design is the proper positioning and spacing of the rebars within the formwork. To ensure the structural integrity of the concrete element, the formwork must be designed to accommodate the rebars and allow for their correct placement. This may involve creating openings or recesses in the formwork to facilitate the passage of the rebars. The presence of steel rebars also affects the size and dimensions of the formwork. As the rebars occupy space within the concrete element, the formwork needs to be adjusted accordingly to accommodate these additional materials. This may require increasing the size or thickness of the formwork to provide the desired concrete cover over the rebars. Another factor influenced by steel rebars in formwork design is the consideration of the weight and load-bearing capacity of the formwork system. The addition of steel rebars significantly increases the weight of the concrete structure, necessitating the design of formwork that can withstand this additional load. This may involve using stronger and more durable materials for the formwork and ensuring proper bracing and support. Furthermore, the presence of steel rebars can impact the formwork construction process. The formwork design must carefully consider the installation and removal of the rebars without compromising the integrity of the formwork system. This may involve incorporating removable sections or panels in the formwork design to facilitate the placement and removal of the rebars. In conclusion, steel rebars have a profound impact on formwork design in construction projects. Proper consideration and planning are necessary to ensure the correct positioning, spacing, and support of rebars within the formwork. The presence of rebars also affects the size, dimensions, weight, and construction process of the formwork system. Overall, the successful construction of durable and structurally sound concrete elements relies on the proper integration of steel rebars within the formwork design.

Q: Can steel rebars be used in structures with high seismic activity?: Yes, steel rebars can be used in structures with high seismic activity. Steel rebars are commonly used in seismic-resistant structures due to their high strength and ductility, which allows them to absorb and dissipate seismic energy effectively. Additionally, steel rebars can be designed and reinforced to enhance the overall seismic performance of a structure, making them a suitable choice for buildings located in regions prone to earthquakes.

Q: What are the different types of tests conducted on steel rebars for quality assurance?: There are several types of tests conducted on steel rebars for quality assurance. Some common tests include tensile testing, bend testing, impact testing, hardness testing, and chemical composition analysis. These tests help ensure that the rebars meet the required mechanical properties, dimensional tolerances, and chemical composition standards, ensuring their quality and suitability for various construction applications.

Q: How do steel rebars affect the durability of concrete?: The durability of concrete structures is greatly enhanced by steel rebars, as they play a crucial role in various aspects. Firstly, steel rebars increase the tensile strength of concrete. While concrete has impressive compressive strength, it lacks strength when it comes to tension. When external forces or loads are applied, concrete tends to crack and fail under tension. However, by embedding steel rebars within the concrete, the load is effectively distributed throughout the structure, preventing cracking and the propagation of cracks. This reinforcement allows the concrete to withstand greater tensile forces, thus improving its durability. Moreover, steel rebars assist in controlling the shrinkage and cracking of concrete. During the curing process, concrete shrinks due to water evaporation. This shrinkage can lead to the formation of cracks, compromising the structure's integrity. By incorporating steel rebars, the concrete is reinforced, restraining shrinkage and minimizing the occurrence and propagation of cracks. This ensures the durability of the concrete by maintaining its structural integrity. Furthermore, steel rebars have high resistance to corrosion. Concrete is generally alkaline, creating a protective layer on the surface of the steel rebars, preventing rusting or corrosion. This resistance to corrosion is crucial in maintaining the durability of concrete structures, especially in environments where they are exposed to moisture, chemicals, or other corrosive agents. The presence of steel rebars guarantees that the concrete remains structurally sound, preventing any potential weakening or deterioration due to corrosion. In conclusion, steel rebars have a significant impact on the durability of concrete structures. They enhance the tensile strength, control shrinkage and cracking, and provide resistance to corrosion. By reinforcing the concrete, steel rebars ensure that the structure can withstand external forces, maintain its structural integrity, and have a longer lifespan.

Q: How do steel rebars contribute to the crack-resistance of concrete?: Steel rebars, also known as reinforcement bars, play a crucial role in enhancing the crack-resistance of concrete structures. When embedded within concrete, rebars act as a reinforcement system that helps to distribute and resist tensile forces. This is important because concrete is known for its high compressive strength but relatively low tensile strength. The primary way in which rebars contribute to crack-resistance is by absorbing tensile stresses that would otherwise cause cracks to develop in the concrete. As the load is applied to the structure, the rebars bear the tension forces, preventing the concrete from undergoing excessive tensile stress and cracking. This is particularly significant in areas where the structure is subjected to bending or flexing forces. Moreover, the bond between the steel rebars and the surrounding concrete, known as the bond strength, also plays a role in crack-resistance. The presence of rebars enhances this bond, preventing the concrete from separating or debonding under stress. This ensures that the load is effectively transferred between the rebars and the concrete, further reducing the likelihood of cracks. Furthermore, steel rebars can help control crack widths in concrete. When tensile forces are applied, the rebars act as a restraint, limiting the width of any cracks that may form. This prevents the cracks from widening and becoming more severe, preserving the overall integrity and durability of the structure. In summary, steel rebars significantly contribute to the crack-resistance of concrete by absorbing tensile stresses, enhancing the bond strength, and controlling crack widths. Their presence within the concrete structure helps to distribute and resist forces, preventing cracks from forming and ensuring the longevity and safety of the construction.

Q: What is the effect of impurities on the corrosion resistance of steel rebars?: Impurities in steel rebars can have a negative impact on their corrosion resistance. These impurities, such as sulfur, phosphorus, and certain non-metallic inclusions, can promote the formation of localized corrosion sites and accelerate the corrosion process. Additionally, impurities can weaken the protective oxide layer on the surface of the steel, making it more susceptible to corrosion. Therefore, minimizing impurities in steel rebars is crucial to ensure their long-term corrosion resistance and structural integrity.

Q: Are there any specific guidelines for storing and handling steel rebars?: Yes, there are specific guidelines for storing and handling steel rebars. These guidelines typically include storing rebars on a flat surface to prevent bending and distortion, keeping them off the ground to prevent rusting, and protecting them from moisture and exposure to chemicals. Additionally, rebars should be handled with care to avoid any damage or injury, and they should be stored in a well-organized manner to ensure easy identification and retrieval.

Q: Are steel rebars resistant to chemical attacks?: Yes, steel rebars are generally resistant to chemical attacks. The high strength and durability of steel make it less susceptible to damage from various chemicals, including acids and alkalis. However, certain aggressive chemicals or environments may cause corrosion over time, which can be mitigated by applying protective coatings or using corrosion-resistant alloys.

Q: What are the different types of steel rebars used in underground constructions?: Underground constructions commonly employ various types of steel rebars, each serving a specific purpose. These rebars fortify concrete structures, enhancing their durability and strength. 1. Carbon Steel Rebars: The most prevalent kind of rebar used underground is carbon steel rebars. They boast high tensile strength due to their composition of carbon steel, rendering them suitable for diverse applications. 2. Epoxy-Coated Rebars: Carbon steel rebars receive an epoxy coating, transforming them into epoxy-coated rebars. This protective layer makes them resistant to corrosion, rendering them ideal for underground constructions where moisture and chemicals are present. 3. Stainless Steel Rebars: Stainless steel rebars offer exceptional resistance to corrosion and possess excellent strength properties. They are commonly employed in underground constructions that anticipate extreme environmental conditions, such as high humidity or exposure to saltwater. 4. Galvanized Rebars: Carbon steel rebars undergo a zinc coating process, resulting in galvanized rebars. This coating enhances their corrosion resistance, making them suitable for underground constructions situated in areas with elevated moisture levels or exposure to chemicals. 5. Fiberglass Rebars: Fiberglass rebars consist of glass fibers embedded within a resin matrix. They are lightweight, corrosion-resistant, and possess high tensile strength. Fiberglass rebars are frequently utilized in underground constructions that necessitate non-magnetic properties, such as proximity to sensitive equipment or areas susceptible to electromagnetic interference. The selection of a specific type of steel rebar for an underground construction project is based on its unique advantages and the project's specific requirements. Factors such as environmental conditions, load-bearing capacity, and anticipated lifespan are carefully considered when determining the appropriate steel rebar for a particular application.

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