High quality deformed bar 6mm-50mm BS4449

High quality deformed bar 6mm-50mm BS4449 System 1

High quality deformed bar 6mm-50mm BS4449

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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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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: Which is more expensive, rebar or round steel? Which is your business opportunity, such as thread steel and round bar?: The two thread steel and round steel, which will be more expensive, steel and round steel prices now are soaring, steel prices per ton in 4300 yuan / ton, quality steel grade three Beijing qianshengcheng price is in 3950-4200 yuan / ton.

Q: How do steel rebars affect the fire resistance of concrete structures?: Steel rebars can significantly enhance the fire resistance of concrete structures. The presence of steel rebars in concrete acts as reinforcement, providing added strength and stability to the structure. This reinforcement helps the concrete withstand the intense heat generated during a fire. The fire resistance of concrete structures is primarily due to the low thermal conductivity of concrete. When exposed to high temperatures, concrete undergoes a process called spalling, where the outer layer of the concrete breaks off due to the rapid expansion of water trapped within. However, the presence of steel rebars helps minimize spalling by holding the concrete together, preventing it from falling apart. Furthermore, steel rebars have a higher melting point compared to concrete. This means that even when exposed to extreme heat, the steel rebars retain their strength and integrity. As a result, the overall structural stability of the concrete structure is maintained, even under fire conditions. Steel rebars also act as a heat sink, absorbing and dissipating heat away from the surrounding concrete. This heat dissipation prevents localized hotspots from forming and spreading throughout the structure, minimizing the risk of structural failure. To improve the fire resistance of concrete structures further, special types of steel rebars, known as fire-resistant or fire-rated rebars, can be used. These rebars are specifically designed to withstand high temperatures for extended periods without losing their strength. They are often coated with materials such as epoxy or intumescent coatings that provide additional protection against fire. In conclusion, steel rebars play a crucial role in enhancing the fire resistance of concrete structures. Their presence improves the overall structural stability, minimizes spalling, dissipates heat, and provides added strength to withstand the intense heat generated during a fire.

Q: How do steel rebars prevent corrosion in concrete structures?: Steel rebars prevent corrosion in concrete structures through a process called passivation. When rebars are embedded in concrete, the alkaline environment of the concrete causes the formation of a protective oxide layer on the surface of the steel. This oxide layer acts as a barrier, preventing the penetration of oxygen and moisture that are necessary for corrosion to occur. Additionally, rebars are often coated with epoxy or galvanized to provide an extra layer of protection against corrosion.

Q: How do steel rebars affect the cost of a construction project?: Several factors come into play when considering how steel rebars can affect the cost of a construction project. To start, reinforced concrete structures often rely on steel rebars for strength and stability. The specific quantity and quality of rebars necessary for a project depend on factors like the structure's size, design, and intended use. The cost of steel rebars is a significant factor to consider. Fluctuations in market conditions, availability, and demand can cause the price of steel rebars to vary, which can have a substantial impact on the overall project cost. Additionally, the grade and quality of rebars can also differ, with higher grades typically being more expensive. Moreover, the quantity of rebars needed directly influences the cost. Large-scale projects that require a significant amount of rebars, such as high-rise buildings or infrastructure projects, can incur considerable expenses related to rebars. The cost is influenced by factors like the structure's size, complexity, and the engineering and design requirements. Labor costs associated with handling, cutting, bending, and placing rebars are another critical consideration. Skilled labor is necessary to ensure proper installation, correct positioning, and securement of rebars. The more complex the structure or design, the more labor-intensive and time-consuming the rebar installation becomes, resulting in higher labor costs. In addition, the use of rebars can impact project scheduling and timelines. Additional time may be required for procuring, delivering, and installing rebars, potentially leading to delays in the overall construction schedule. Any delays can result in increased project costs due to extended labor and overhead expenses. Lastly, it is crucial to consider the long-term cost implications of using rebars. Steel rebars provide durability and strength to concrete structures, which can lead to reduced maintenance and repair costs over the project's lifespan. Investing in high-quality rebars from the start can save money in the long run by minimizing the need for future repairs or replacements. In conclusion, the use of steel rebars has a significant impact on the cost of a construction project. The cost of rebars themselves, the quantity required, labor expenses, project scheduling, and long-term durability considerations all contribute to the overall impact on project cost. Construction professionals must carefully analyze and plan for these factors to ensure accurate cost estimations and successful project execution.

Q: What is the purpose of using steel rebars in construction?: The purpose of using steel rebars in construction is to provide reinforcement and strength to concrete structures. Steel rebars enhance the structural integrity of buildings, bridges, and other constructions by improving their resistance to tension forces, preventing cracks, and enhancing overall durability.

Q: What is the role of steel rebars in preventing concrete creep?: The role of steel rebars in preventing concrete creep is crucial. Concrete creep refers to the gradual deformation or movement of concrete over time under sustained load. This phenomenon occurs due to the long-term stress on the concrete, causing it to slowly deform and creep. Steel rebars, which are reinforced steel bars, are used in concrete structures to counteract this creep behavior. They play a significant role in preventing concrete creep by providing tensile strength and reinforcing the structure. When concrete is subjected to a load, it experiences both compressive and tensile forces. While concrete is excellent at withstanding compressive forces, it is relatively weak in tension. This is where steel rebars come into play. By placing steel rebars within the concrete, the tensile strength of the structure is significantly enhanced. Steel has high tensile strength, making it ideal for bearing the tension experienced by the concrete. When the concrete begins to creep under a sustained load, the steel rebars resist the deformation and distribute the tensile forces throughout the structure. The presence of steel rebars helps to restrain the concrete from excessive deformation, reducing the potential for long-term creep. By reinforcing the concrete with steel rebars, the structure becomes more resistant to creep and maintains its stability and integrity over time. Moreover, steel rebars also enhance the overall durability and structural performance of the concrete. They improve the load-bearing capacity, prevent cracking, and enhance the resistance against external forces such as earthquakes or environmental factors. In conclusion, steel rebars play a vital role in preventing concrete creep by providing tensile strength and reinforcing the structure. They resist the deformation of the concrete under sustained load, ensuring its stability and long-term integrity. The use of steel rebars significantly enhances the durability and structural performance of concrete structures, making them more resistant to creep and other potential issues.

Q: What is the role of steel rebars in ensuring structural stability?: Steel rebars play a crucial role in ensuring structural stability by providing reinforcement to concrete structures. They enhance the tensile strength of concrete, which is otherwise weak in tension. By absorbing and distributing stresses, rebars prevent cracks and structural failures, making the structure more durable and resistant to external forces such as earthquakes or heavy loads.

Q: Can steel rebars be used in historical building restoration?: Yes, steel rebars can be used in historical building restoration. Rebars are commonly used in construction to reinforce concrete structures and provide additional strength and durability. When it comes to historical building restoration, the goal is to preserve the original character and aesthetics of the structure while ensuring its structural integrity. Steel rebars can be carefully integrated into the restoration process to strengthen weak areas or replace deteriorated or damaged sections. The use of rebars allows for a more stable and long-lasting structure, ensuring the building's longevity for future generations. However, it is important to ensure that the use of steel rebars in historical building restoration is done in a way that respects the historical significance of the structure. The integration of rebars should be done discreetly, ensuring they do not compromise the building's original appearance or architectural features. Additionally, any restoration work on historical buildings should adhere to strict preservation guidelines and be carried out by skilled professionals with expertise in historical preservation. This ensures that the restoration process maintains the historical integrity of the building while incorporating necessary structural reinforcements, such as steel rebars.

Q: How do steel rebars contribute to the overall fire safety of a structure?: Steel rebars contribute to the overall fire safety of a structure by providing reinforcement and stability to the concrete. They have high melting points, which means they can withstand high temperatures for an extended period of time before losing their strength. This helps prevent the collapse of the structure during a fire, allowing occupants more time to evacuate and firefighters more time to control the blaze.

Q: How do steel rebars affect the overall flexibility of a structure?: Steel rebars can significantly enhance the overall flexibility of a structure. Rebars, being strong and durable, provide reinforcement to concrete, increasing its tensile strength. This reinforcement prevents cracking and enhances the structure's ability to withstand external forces, such as earthquakes or heavy loads. By distributing stress more evenly, steel rebars enhance the flexibility of the structure, allowing it to better adapt to dynamic forces and maintain its integrity.

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