High quality hot rolled deformed bar 6mm-50mm

High quality hot rolled deformed bar 6mm-50mm System 1

High quality hot rolled deformed bar 6mm-50mm

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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:What is the typical elongation of steel rebars?: The typical elongation of steel rebars is around 8-10%.

Q:What are the main properties of steel rebars?: Steel rebars, also known as reinforcing bars, are essential components in reinforced concrete structures. They possess several key properties that make them ideal for providing strength and durability to these structures. 1. Strength: One of the primary properties of steel rebars is their high tensile strength. They can withstand significant pulling forces and provide the necessary reinforcement to resist cracking and structural failure in concrete. 2. Ductility: Steel rebars exhibit excellent ductility, meaning they can deform without fracturing under stress. This property allows them to absorb energy during seismic events or other extreme loads, enhancing the overall structural performance and resilience of the reinforced concrete. 3. Corrosion resistance: Steel rebars are typically manufactured with a protective layer, such as epoxy or galvanized coating, to prevent corrosion. This property is crucial as exposure to moisture, chloride ions, and other corrosive elements can significantly weaken the rebars and compromise the integrity of the structure. 4. Weldability: Steel rebars can be easily welded together, allowing for efficient and effective construction. This property ensures that rebars can be connected to form a continuous and robust reinforcement network, enhancing the overall strength and stability of the concrete structure. 5. Thermal compatibility: Steel rebars have similar thermal expansion and contraction properties to concrete, minimizing the risk of cracking or structural damage due to temperature changes. This compatibility ensures the long-term durability and stability of reinforced concrete structures. 6. Availability and cost-effectiveness: Steel rebars are widely available and relatively cost-effective compared to other reinforcing materials. This affordability, combined with their excellent mechanical properties, makes them a popular choice for structural reinforcement across various construction projects. In conclusion, the main properties of steel rebars include high tensile strength, ductility, corrosion resistance, weldability, thermal compatibility, and cost-effectiveness. These properties make steel rebars indispensable for providing structural strength and durability to reinforced concrete structures.

Q:How is steel rebar made?: Steel rebar, which is short for reinforcing bar, undergoes a process known as steel reinforcement fabrication to be produced. The initial stage of manufacturing steel rebar involves melting down raw materials such as iron ore, coal, and limestone in a blast furnace. This procedure, called smelting, results in the creation of molten iron. Following smelting, the molten iron is refined and purified in a basic oxygen furnace to eliminate impurities such as carbon, sulfur, and phosphorous. By refining the molten iron, the steel that is produced attains the desired strength and properties. Once the refining process is complete, the steel is cast into long, solid bars called billets. These billets are then heated and rolled into elongated strands known as rebars. The rolling process entails passing the billets through a series of rollers that gradually shape and elongate the steel. After the rebars have been formed, they are cooled and cut into various lengths based on their intended use, such as reinforcing concrete in structures like buildings and bridges. To further enhance the strength and durability of the rebar, it can undergo a process called quenching and tempering. This involves subjecting the rebar to high temperatures, followed by rapid cooling and subsequent reheating and slow cooling. This process significantly improves the mechanical properties of the rebar, making it more resistant to wear, corrosion, and other external forces. Finally, the rebar undergoes a surface treatment process, such as hot-dip galvanizing or epoxy coating, to safeguard it against rust and corrosion. This coating ensures that the rebar maintains its structural integrity and longevity when utilized in various construction applications. In summary, the production of steel rebar involves a series of steps, including smelting, refining, casting, rolling, cutting, heat treatment, and surface coating. These processes guarantee that the final product meets the necessary strength and durability requirements for reinforcing concrete structures.

Q:How do steel rebars improve the load-carrying capacity of concrete?: Steel rebars improve the load-carrying capacity of concrete through a combination of reinforcement and strength enhancement. When steel rebars are embedded within the concrete, they provide tensile strength to a material that is otherwise weak in tension. This is because concrete is strong in compression but relatively weak in tension. The rebars act as a support system within the concrete, distributing the load more evenly and preventing cracks or failure. When a load is applied to the concrete, the rebars resist the tensile forces and help to hold the concrete together, increasing its ability to carry and distribute the load. Furthermore, steel rebars also enhance the ductility of concrete. Ductility refers to the ability of a material to deform without fracturing. By adding steel rebars, the concrete becomes more flexible and capable of withstanding greater stress and strain without failure. This is particularly important in structures subject to earthquakes, as the ability to absorb and dissipate energy is crucial for their overall integrity. In summary, steel rebars improve the load-carrying capacity of concrete by reinforcing it with tensile strength, distributing the load more evenly, preventing cracks, and enhancing its overall ductility. This combination of reinforcement and strength enhancement significantly increases the structural stability and durability of concrete structures.

Q:What are the guidelines for ensuring proper bond between steel rebars and concrete?: The guidelines for ensuring proper bond between steel rebars and concrete include ensuring clean and rust-free rebars, providing adequate concrete cover, using proper bar spacing and diameter, using mechanical bond enhancers if necessary, and properly compacting the concrete around the rebars. Additionally, proper curing and hydration of the concrete are essential for achieving a strong bond between the rebars and concrete.

Q:How are steel rebars installed in concrete slabs?: The process of reinforcing concrete slabs involves the installation of steel rebars. These rebars are placed in a specific pattern within the concrete slab to provide additional strength and support. To begin, the area where the concrete slab will be poured is prepared by excavating and leveling the ground. A layer of compacted gravel or crushed stone, known as the base, is then placed to create a stable foundation. Once the base is in place, the rebars are positioned within the slab according to the desired locations. Typically, they are arranged in a grid-like pattern, with horizontal rebars placed parallel to each other and vertical rebars placed perpendicular to the horizontal ones. The spacing and diameter of the rebars depend on the design requirements and load capacity. To ensure proper positioning, plastic bar supports or chairs are used to lift the rebars off the ground and hold them in place. Additionally, the rebars are tied together at the intersections using wire or metal ties to maintain their relative positions during the concrete pouring process. After the rebars are properly positioned, the concrete is poured over them. The concrete mixture is carefully spread evenly across the entire area of the slab, fully encasing the rebars. Vibrating tools may be utilized to eliminate air bubbles and consolidate the concrete around the rebars. Once the concrete is poured, it is left to cure and harden. During this time, the rebars provide reinforcement, increasing the strength and load-bearing capacity of the slab. Once fully cured, the concrete slab with embedded rebars becomes a durable and structurally sound element capable of withstanding various loads and stresses. In conclusion, the installation of steel rebars in concrete slabs involves positioning them in a grid-like pattern and pouring the concrete over them. This reinforcing process enhances the strength and durability of the slab, making it suitable for a wide range of applications.

Q:How do steel rebars contribute to the durability of a structure?: Steel rebars contribute to the durability of a structure by reinforcing and strengthening concrete. They provide structural integrity, increase resistance to bending and cracking, and enhance the overall load-bearing capacity of the building. The steel rebars help distribute the applied loads evenly throughout the structure, preventing potential failures and ensuring long-term durability.

Q:How do steel rebars affect the overall construction cost of commercial buildings?: Steel rebars can have a significant impact on the overall construction cost of commercial buildings. These rebars, which are typically used to reinforce concrete structures, play a crucial role in ensuring the strength and durability of the building. Firstly, the cost of steel rebars themselves can add to the construction budget. The price of steel rebars fluctuates based on market conditions and availability, and since they are a necessary component in construction, their cost can have a direct impact on the overall project expenses. Secondly, the installation of steel rebars requires skilled labor and specialized equipment, which adds to the construction cost. Skilled ironworkers are needed to precisely place the rebars in the correct positions as per the structural design. The labor cost associated with this skilled work can be a significant portion of the overall construction budget. Moreover, the amount and density of steel rebars used in the construction also affect the cost. The structural engineer determines the necessary quantity and spacing of rebars based on the building's design and load-bearing capacities. In some cases, more rebars are required to meet specific safety standards or to withstand higher levels of stress. This increased quantity of steel rebars will inevitably lead to higher material and labor costs. However, it is important to note that the use of steel rebars in commercial buildings is essential for ensuring the structural integrity and safety of the construction. While they may contribute to the overall cost, their benefits outweigh the expenses. Steel rebars provide reinforcement to concrete, increasing its tensile strength and ability to withstand external forces such as earthquakes, wind, and heavy loads. This ultimately leads to a longer lifespan for the building and reduces the likelihood of costly repairs or structural failures in the future. In conclusion, steel rebars do impact the overall construction cost of commercial buildings due to the cost of the rebars themselves, the labor required for their installation, and the quantity needed based on the structural design. However, the use of steel rebars is crucial for ensuring the strength and durability of the building, reducing long-term maintenance costs, and ensuring the safety of occupants.

Q:How do steel rebars affect the overall fire resistance of concrete structures?: Steel rebars can significantly improve the fire resistance of concrete structures. The high thermal conductivity of steel helps in dissipating heat away from the concrete, preventing rapid temperature rise and structural failure. Additionally, the presence of rebars enhances the load-bearing capacity of the structure during a fire, enabling it to withstand the intense heat for a longer duration before collapsing.

Q:How do steel rebars affect the overall structural stability of a building?: The overall structural stability of a building is greatly improved with the use of steel rebars. These reinforcing bars are commonly employed in concrete structures to provide additional strength and support to the building's framework. By embedding steel rebars within the concrete, the building's overall structural integrity and load-bearing capacity are significantly heightened. The main purpose of steel rebars is to reinforce and strengthen concrete, which is susceptible to tension forces. Concrete possesses excellent compressive strength but has limited resistance to tensile forces. Steel rebars, which are highly tensile in nature, counteract these tension forces and prevent the concrete from cracking or failing when under stress. Rebars are strategically placed within the concrete to more efficiently distribute and transfer loads. This redistribution of forces reduces the likelihood of localized structural failures and ensures that the building can withstand external forces such as wind, seismic activity, or heavy loads. Furthermore, steel rebars also improve the durability and longevity of a building. By reinforcing the concrete, rebars help minimize cracking and prevent the propagation of cracks. This is particularly important in areas prone to seismic activity since rebars can absorb and dissipate energy generated during an earthquake, reducing the risk of collapse. In addition to their role in ensuring structural stability, steel rebars also offer design flexibility. They can be shaped and bent into various configurations, enabling architects and engineers to create complex and innovative structures effortlessly. This design flexibility not only enhances the aesthetics of the building but also allows for the construction of unique architectural features that would otherwise be difficult or impossible to achieve. In summary, steel rebars are vital for enhancing the overall structural stability of a building. By reinforcing the concrete, they increase its load-bearing capacity, improve resistance to tensile forces, and more efficiently distribute loads. Their presence significantly reduces the risk of structural failure, enhances durability, and allows for greater design flexibility.

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