Deformed bars in Grade HRB400 with Best Quality

Deformed bars in Grade HRB400 with Best Quality System 1

Deformed bars in Grade HRB400 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: What are the factors that determine the spacing of steel rebars in a concrete structure?: The spacing of steel rebars in a concrete structure is determined by several factors that ensure the structural integrity and strength of the concrete. These factors include: 1. Structural Design: The spacing of rebars is influenced by the structural design requirements and specifications of the concrete structure. Engineers consider the loads, stresses, and forces that the structure will experience and calculate the required reinforcement spacing accordingly. 2. Concrete Strength: The strength of the concrete being used in the structure is an essential factor in determining rebar spacing. Higher-strength concrete may require closer spacing of rebars to provide adequate reinforcement and prevent cracking or failure under load. 3. Rebar Diameter: The diameter of the steel rebars also plays a role in determining the spacing. Thicker or larger diameter rebars may require wider spacing, whereas thinner rebars typically require closer spacing to provide the desired reinforcement. 4. Bar Bending and Placing: The ease of bending and placing the rebars during construction is another important factor. The spacing is often determined by practical considerations, such as ensuring proper access for workers and equipment, and facilitating the concrete pouring process. 5. Environmental Factors: Environmental conditions, such as exposure to corrosive substances or extreme weather conditions, can influence the spacing of rebars. Closer spacing may be required in corrosive environments to provide additional protection against rust and deterioration. 6. Building Codes and Regulations: Building codes and regulations set by local authorities or relevant organizations also dictate the minimum requirements for rebar spacing in concrete structures. These codes ensure compliance with safety standards and provide guidelines for construction practices. Overall, the spacing of steel rebars in a concrete structure is a critical aspect of ensuring its strength, durability, and resilience. It is determined by a combination of structural design, concrete strength, rebar diameter, construction practicalities, environmental considerations, and adherence to building codes and regulations.

Q: How do steel rebars contribute to the structural stability of a building?: Steel rebars contribute to the structural stability of a building by providing reinforcement to concrete structures. They increase the tensile strength of concrete, allowing it to withstand bending and stretching forces. This reinforcement helps prevent cracks and failures in the building, making it more resistant to seismic activity, heavy loads, and other external factors that could compromise its stability.

Q: Can steel rebars be used in tunnels or underground mines?: Yes, steel rebars can be used in tunnels or underground mines. They are commonly used to reinforce the concrete structures in these environments, providing strength and stability to the tunnel or mine structure.

Q: What is the impact of steel rebars on the overall maintenance of a building?: Steel rebars have a significant impact on the overall maintenance of a building. These reinforced steel bars are commonly used in the construction industry to provide strength and stability to concrete structures. The presence of rebars enhances the structural integrity of the building, making it more resistant to external forces such as earthquakes, wind, and heavy loads. One of the key benefits of using steel rebars is their ability to prevent cracking and minimize the occurrence of structural failures. By reinforcing the concrete, rebars distribute the load more evenly, reducing the stress on the building. This helps to prevent cracks from forming and spreading, which can compromise the structural stability and lead to costly repairs. Furthermore, steel rebars also play a crucial role in increasing the durability and lifespan of a building. They provide additional strength to the concrete, making it more resistant to wear and tear over time. This means that the building requires less frequent maintenance and repairs, resulting in cost savings for the owners. In terms of maintenance, steel rebars require minimal attention once they are properly installed. However, regular inspection and maintenance of the rebars are necessary to ensure their continued effectiveness. This may include checking for signs of corrosion, which can weaken the rebars and compromise the structural integrity of the building. Appropriate measures such as protective coatings or regular cleaning can be taken to prevent corrosion and extend the lifespan of the rebars. In summary, steel rebars have a positive impact on the overall maintenance of a building. They enhance the structural integrity, prevent cracking, and increase the durability of the structure, resulting in reduced maintenance needs and extended lifespan. Regular inspection and maintenance of the rebars are essential to ensure their effectiveness and mitigate potential issues such as corrosion.

Q: What are the common challenges in handling steel rebars during construction?: Some common challenges in handling steel rebars during construction include their heavy weight, which can make them difficult to lift and maneuver, the need for proper storage to prevent rusting and damage, the risk of injury if not handled correctly, and the need for precision in cutting and bending them to fit specific structures.

Q: What is the lifespan of steel rebars in marine structures?: The lifespan of steel rebars in marine structures can vary depending on various factors such as the quality of the steel, the environment in which they are exposed, and the maintenance practices employed. However, properly designed, constructed, and maintained marine structures with steel rebars can typically have a lifespan of 50 to 100 years. Steel rebars used in marine structures are generally coated with corrosion-resistant materials, such as epoxy or zinc, to protect them from the harsh marine environment. These coatings provide an additional layer of defense against corrosion, extending the lifespan of the rebars. However, it is important to note that the marine environment is highly corrosive due to the presence of saltwater, humidity, and other corrosive agents. Over time, these factors can lead to the degradation of the protective coatings and the exposure of the rebars to corrosion. If adequate maintenance measures are not taken, such as regular inspections, cleaning, and reapplication of protective coatings, the rebars may experience accelerated corrosion and their lifespan may be shortened. Additionally, the design and construction of marine structures play a crucial role in determining the lifespan of steel rebars. Proper considerations must be given to factors such as structural design, material selection, and detailing to minimize the risk of corrosion and ensure the longevity of the rebars. In summary, the lifespan of steel rebars in marine structures can range from 50 to 100 years, depending on factors such as the quality of the steel, the environmental conditions, and the maintenance practices employed. Proper design, construction, and maintenance are essential to maximizing the lifespan of steel rebars in marine structures.

Q: What are the different types of steel rebars used in dam constructions?: There are generally three types of steel rebars commonly used in dam constructions: mild steel rebar, high-strength deformed rebar, and epoxy-coated rebar. These rebars serve different purposes based on their properties and are chosen accordingly for specific areas of the dam structure. Mild steel rebars are typically used in non-structural areas, while high-strength deformed rebars provide greater tensile strength for critical structural elements. Epoxy-coated rebars are used in environments where corrosion resistance is crucial, such as areas exposed to water or chemicals.

Q: What is the effect of steel rebars on the durability of concrete structures?: Steel rebars have a significant effect on the durability of concrete structures. When used as reinforcement within the concrete, rebars enhance the strength and longevity of the structure. Concrete on its own is strong in compression but weak in tension. By incorporating steel rebars, which have high tensile strength, into the concrete, the overall structural integrity is greatly improved. The presence of rebars in concrete mitigates the potential for cracking and structural failure. When subjected to external forces or natural phenomena like earthquakes or temperature fluctuations, the rebars distribute the load and help resist bending, shearing, and tension forces. This prevents the occurrence of cracks and ensures that the concrete structure remains intact and stable. Furthermore, steel rebars also protect the concrete from corrosion. Concrete is susceptible to moisture and chemicals that can penetrate its surface and lead to the corrosion of embedded reinforcement. However, rebars act as a protective barrier, preventing moisture and harmful substances from reaching the concrete and causing corrosion. This extends the lifespan of the structure and reduces maintenance and repair costs. In summary, the inclusion of steel rebars in concrete structures significantly enhances their durability. They provide increased strength, resistance to external forces, and protection against corrosion. The combination of concrete and steel rebars creates a robust and long-lasting structure that can withstand various environmental and structural challenges.

Q: Can steel rebars be used in tunnels or underground mines?: Yes, steel rebars can be used in tunnels or underground mines. They are commonly used to reinforce the concrete structures in these environments, providing strength and stability to the tunnel or mine structure.

Q: How are steel rebars installed in concrete?: Steel rebars are installed in concrete by first placing them in the desired locations within the concrete formwork. The rebars are then secured in place using wire ties or rebar chairs to ensure they remain in the correct position during the pouring and curing process. This helps to reinforce the concrete and provide strength to the structure.

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