Hot rolled deformed bar BS4449 G460B HRB400

Hot rolled deformed bar BS4449 G460B HRB400 System 1

Hot rolled deformed bar BS4449 G460B HRB400

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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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Deformed Bar Details:

Minimum Order Quantity:	m.t.	Unit:	m.t.	Loading Port:
Supply Ability:	m.t./month	Payment Terms:	TT OR LC	Package:	wire rod packing

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 is the effect of carbonation on steel rebars?: The effect of carbonation on steel rebars is primarily detrimental. Carbonation refers to the process in which carbon dioxide from the atmosphere reacts with the alkaline compounds in concrete, lowering its pH level. This reduction in pH causes a gradual decrease in the passivation layer of steel rebars, which is a protective layer that prevents corrosion. When the passivation layer is compromised due to carbonation, the steel rebars become more susceptible to corrosion. Carbon dioxide reacts with moisture in the concrete, producing carbonic acid, which further lowers the pH level and accelerates the corrosion process. As corrosion progresses, the steel rebars can lose their structural integrity, compromising the overall strength and durability of the concrete structure. The expansion of corrosion products can also exert pressure on the surrounding concrete, leading to cracking and spalling. This can expose the steel rebars to more moisture and oxygen, exacerbating the corrosion process. Furthermore, carbonation can also reduce the effectiveness of any protective coatings applied on the rebars, making them even more vulnerable to corrosion. To mitigate the effects of carbonation on steel rebars, several preventive measures can be taken. These include using concrete with a lower permeability to carbon dioxide, ensuring proper concrete cover thickness, and using corrosion-resistant steel with a higher level of chromium and/or other alloying elements. Regular monitoring and maintenance of the concrete structures are also essential to detect and address any signs of corrosion at an early stage. In summary, carbonation can have a detrimental effect on steel rebars by compromising the passivation layer, leading to corrosion and weakening of the structure. Therefore, it is crucial to implement preventive measures and regular maintenance to ensure the long-term durability and safety of steel-reinforced concrete structures.

Q:Can steel rebars be used in parking structure construction?: Using steel rebars in parking structure construction is a common practice. They provide strength and durability to reinforced concrete structures. The use of steel rebars is especially important in parking structures due to the heavy loads and traffic they experience. These rebars are typically placed in the concrete slabs, walls, and columns of the structure, improving its load-bearing capacity and resistance to compression, tension, and bending. Additionally, steel rebars can also reinforce ramps, driveways, and other areas that require extra support. Overall, incorporating steel rebars is crucial in parking structure construction to comply with safety standards and ensure the facility's longevity.

Q:Can steel rebars be used in structures with limited accessibility?: Yes, steel rebars can be used in structures with limited accessibility. Due to their small size and flexibility, rebars can be easily maneuvered and installed in areas with restricted access, making them suitable for various construction projects.

Q:Are steel rebars suitable for use in industrial structures?: Industrial structures can benefit from the use of steel rebars. These reinforcing bars, also known as steel rebars, are frequently used in the construction industry to enhance the strength and stability of concrete structures. Crafted from high-strength steel, they possess exceptional tensile strength, making them perfect for fortifying concrete in industrial structures that encounter hefty loads, vibrations, or other dynamic forces. Steel rebars also boast good ductility, enabling them to endure bending without fracturing. This is a crucial characteristic in industrial structures that demand high structural integrity. Moreover, steel rebars display commendable resistance to corrosion, a vital quality in industrial environments where exposure to moisture, chemicals, or other corrosive agents is common. In summary, steel rebars serve as a dependable and long-lasting option for reinforcing industrial structures, preserving their structural stability and safety over time.

Q:What are the factors to consider while calculating the required number of steel rebars in a project?: There are several factors to consider while calculating the required number of steel rebars in a project. Some of these factors include the structural design, the load-bearing capacity, the concrete strength, the reinforcement spacing and arrangement, the bar diameter and size, the project specifications and requirements, and any applicable building codes and regulations. Additionally, factors such as the length and width of the structure, the type of construction (e.g., residential, commercial, industrial), and the environmental conditions should also be taken into account.

Q:What is the role of steel rebars in maintaining structural integrity?: Steel rebars play a crucial role in maintaining structural integrity by reinforcing and strengthening concrete structures. They provide tensile strength to resist cracking, bending, and shearing forces, enhancing the overall stability and durability of buildings, bridges, and other infrastructure.

Q:How do steel rebars affect the overall lifespan of a structure?: Steel rebars can significantly enhance the overall lifespan of a structure. By providing reinforcement and increasing the structural strength, rebars help the structure withstand external forces, such as earthquakes or heavy loads, thus reducing the risk of collapse or structural failure. Additionally, rebars prevent cracks and minimize the effects of corrosion, ensuring the longevity and durability of the structure.

Q:What is the average lifespan of a reinforced concrete structure with steel rebars?: The average lifespan of a reinforced concrete structure with steel rebars can vary depending on various factors such as the quality of construction, maintenance, exposure to environmental conditions, and usage patterns. However, with proper design, construction, and maintenance, reinforced concrete structures with steel rebars can have an average lifespan of 50 to 100 years or more. Reinforced concrete structures are known for their durability and strength due to the combination of concrete and steel reinforcement. The concrete provides compressive strength, while the steel rebars provide tensile strength, making the structure resistant to various loads and forces. However, over time, reinforced concrete structures may experience degradation due to factors such as exposure to moisture, chemicals, temperature changes, and loading conditions. These factors can lead to the corrosion of steel rebars, which is a common concern for the longevity of such structures. Corrosion occurs when moisture and oxygen penetrate the concrete, causing the steel rebars to rust. This rusting process can lead to the expansion of the steel rebars, causing cracks in the concrete and further accelerating the deterioration of the structure. To mitigate the effects of corrosion and extend the lifespan of reinforced concrete structures, various measures can be taken. These include using high-quality concrete and steel rebars, applying protective coatings, implementing proper drainage systems, and conducting regular inspections and maintenance. With appropriate maintenance and upkeep, reinforced concrete structures can last well beyond their average lifespan. However, it is crucial to note that the lifespan can vary depending on specific conditions and circumstances. Therefore, it is essential to consult with structural engineers and industry professionals to assess and determine the expected lifespan of a particular reinforced concrete structure.

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:How are steel rebars protected against chemical attacks in concrete?: Steel rebars are protected against chemical attacks in concrete by using different strategies such as using high-quality concrete with low permeability, adding corrosion inhibitors or protective coatings to the rebars, and ensuring proper concrete cover to prevent direct contact between the steel and aggressive chemicals.

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