HRB400 Deformed Steel Bar,Reinforced Deformed Steel Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 100000 m.t./month
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Item specifice
Standard:
AISI,JIS,GB,BS,DIN,API,EN,ASTM
Technique:
Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring
Shape:
U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
Surface Treatment:
Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B)
Certification:
ISO,SGS,BV,IBR,RoHS,CE,API,BSI,UL
Thickness:
--
Length:
--
Net Weight:
--
Product Description:
Specifications of HRB400 Deformed Steel Bar,Reinforced 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 | ||
Chemical Composition of HRB400 Deformed Steel Bar,Reinforced Deformed Steel Bar
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 | |||||
Usage and Applications of HRB400 Deformed Steel Bar,Reinforced 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,Reinforced 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
Images of HRB400 Deformed Steel Bar,Reinforced Deformed Steel Bar
- Q:Can steel rebars be used in the construction of shopping malls and commercial buildings?
- Yes, steel rebars can be used in the construction of shopping malls and commercial buildings. Steel rebars are commonly used as reinforcement in concrete structures to enhance their strength and durability. Due to their high tensile strength and ability to withstand heavy loads, steel rebars provide structural stability and help prevent cracking and collapse in large-scale constructions like shopping malls and commercial buildings.
- Q:How do steel rebars affect the overall corrosion resistance of marine structures?
- Steel rebars have a significant impact on the overall corrosion resistance of marine structures. The presence of steel rebars in concrete marine structures can enhance or deteriorate their resistance to corrosion, depending on various factors. Firstly, steel rebars can enhance corrosion resistance when proper preventive measures are taken. For instance, if the rebars are adequately coated with anti-corrosion materials such as epoxy or zinc, they can provide an extra layer of protection against the corrosive effects of seawater. Additionally, proper concrete cover and compaction during construction can help prevent the penetration of seawater to the rebars, reducing the risk of corrosion. On the other hand, if steel rebars are not properly coated or if the concrete cover is insufficient, they can contribute to the degradation of marine structures. When exposed to the aggressive marine environment, rebars can undergo corrosion, leading to the formation of rust. The rust occupies more space than steel, causing an expansion that exerts pressure on the surrounding concrete. This pressure can result in cracking and spalling of the concrete, further exposing the rebars to corrosion and compromising the overall structural integrity of the marine structure. To mitigate the negative effects of steel rebars on corrosion resistance, regular maintenance and inspection are crucial. Periodic inspections can help identify any signs of corrosion, allowing for timely repairs or replacement of rebars. Additionally, cathodic protection systems can be implemented to provide an electrochemical countermeasure against corrosion, ensuring the longevity and durability of the marine structure. In conclusion, steel rebars play a vital role in the corrosion resistance of marine structures. Proper coating, concrete cover, and maintenance measures are essential in ensuring the rebars' positive contribution to corrosion resistance, while neglecting these factors can lead to the degradation of marine structures.
- Q:What is the impact of steel rebars on the sustainability of a structure?
- Steel rebars have a significant impact on the sustainability of a structure. They enhance the structural integrity and durability of buildings, improving their longevity and reducing the need for frequent repairs or replacements. The use of steel rebars also allows for the construction of taller and more complex structures, optimizing space utilization and reducing the environmental footprint. Additionally, steel rebars can be recycled, promoting resource efficiency and reducing the demand for new steel production, thereby contributing to the overall sustainability of the structure and the construction industry as a whole.
- Q:How are steel rebars classified based on their shapes?
- Various types of steel rebars are categorized according to their shapes. Among the commonly used types is the plain round bar, which is a straight cylindrical rod without any deformations or protrusions. Another type is the deformed bar, which possesses deformations or ribs on its surface. These deformations effectively enhance the bond between the bar and the concrete, thereby improving the overall structural strength. Deformed bars come in different patterns of deformations, including ribbed, twisted, and indented. Ribbed bars have evenly spaced protrusions along their length, which increase the surface area and enhance the grip with the concrete. Twisted bars, on the other hand, showcase a helical pattern of deformations, providing a strong grip. Indented bars feature small indentations or notches on their surface, thereby enhancing the bond strength. In addition to plain round and deformed bars, there are also specialized shapes available for specific applications. These include square bars, which have a square cross-section, and rectangular bars, which possess a rectangular cross-section. These shapes are often utilized in scenarios where the rebars need to be positioned in a particular orientation or where additional strength is required in a specific direction. Overall, the classification of steel rebars based on their shapes permits the selection of the most suitable type for various construction projects, taking into account factors such as bonding strength, load-bearing capacity, and specific design requirements.
- Q:What are the guidelines for the proper installation of steel rebars?
- The guidelines for the proper installation of steel rebars include ensuring proper alignment and spacing, adequate cover, secure anchorage, and appropriate placement within the concrete structure. The rebars should be cleaned of any dirt, rust, or oil before installation, and the concrete should be properly prepared to ensure good bonding between the rebars and the surrounding concrete. Additionally, proper supervision and inspection during the installation process are crucial to ensure compliance with engineering specifications and standards.
- Q:Are steel rebars resistant to chemicals?
- Yes, steel rebars are generally resistant to chemicals. The corrosion resistance properties of steel rebars make them suitable for use in various chemical environments. However, exposure to certain aggressive chemicals or environments may lead to corrosion over time, so it is essential to consider the specific conditions and choose the appropriate type of steel or protective coatings accordingly.
- Q:What is the effect of chloride ions on steel rebars?
- The presence of chloride ions in the environment can have a detrimental effect on steel rebars. Chloride ions can penetrate the protective oxide layer on the surface of the steel and react with the iron atoms, leading to the formation of iron chloride compounds. These compounds are highly corrosive and can cause the rebars to rust and eventually weaken. This corrosion process, known as chloride-induced corrosion, can significantly reduce the structural integrity and lifespan of steel rebars, posing a risk to the overall stability of reinforced concrete structures. Therefore, it is crucial to protect steel rebars from chloride exposure through proper design, construction, and maintenance practices to ensure their long-term durability and safety.
- Q:How are steel rebars used in the construction of dams?
- The construction of dams relies heavily on steel rebars, as they offer the necessary strength and stability to the structure. Dams, which are massive concrete constructions designed to contain water for various purposes like hydroelectric power generation, irrigation, and flood control, greatly benefit from the presence of steel rebars. Steel rebars, also referred to as reinforcing bars, are essential in reinforcing the concrete and enhancing its ability to withstand tension. Although concrete is excellent at withstanding compression, it is relatively weak when it comes to tension. This is where steel rebars come into play, as they are strategically positioned inside the concrete structure to counteract any tensile forces that may lead to cracks or failure. Typically, in the construction of dams, steel rebars are embedded within the concrete in a crisscross manner, forming a network of reinforcement. This configuration helps to evenly distribute the load and resist the immense pressure exerted by the water behind the dam. By reinforcing the concrete, steel rebars ensure that the dam can withstand various forces, including the weight of the water, water pressure, and external factors such as earthquakes. Moreover, steel rebars also serve to prevent cracks from spreading within the concrete. In the event of minor cracks caused by environmental factors or settlement, the rebars act as a barrier, preventing the cracks from expanding and compromising the structural integrity of the dam. To ensure their strength and durability, steel rebars used in dam construction must meet specific standards and specifications. Typically, they are made from high-strength steel capable of withstanding the immense pressures and forces encountered during dam construction. In conclusion, the presence of steel rebars is vital in the construction of dams as they reinforce the concrete, provide the necessary strength and stability, and prevent the propagation of cracks. Their strategic placement and configuration aid in load distribution, tension resistance, and the maintenance of the dam's structural integrity and reliability.
- Q:What is the role of steel rebars in beam and column design?
- The role of steel rebars in beam and column design is crucial, as they serve to reinforce and enhance the structural integrity of these elements. In reinforced concrete structures, rebars are utilized to withstand tensile forces that concrete alone is unable to bear. When it comes to beams, it is common practice to position rebars at the bottom to counteract the tensile stresses caused by bending moments. By distributing the load along the length of the beam, rebars effectively bolster its strength and prevent the occurrence of cracks or failures. The tension-resisting ability of rebars is instrumental in maintaining the beam's shape and its capacity to bear loads, thereby ensuring the overall stability of the entire construction. Similarly, in columns, rebars are placed throughout their length to withstand both axial and bending forces. They enhance the column's capacity to endure compression, while simultaneously offering additional resistance against lateral loads from seismic or wind forces. The presence of rebars in columns significantly amplifies their load-bearing capability and overall stability. To summarize, steel rebars play a pivotal role in beam and column design by providing reinforcement against tensile forces, augmenting structural strength, averting cracks, and guaranteeing the overall stability and safety of the structure.
- Q:What are the factors that can affect the lifespan of steel rebars in concrete structures?
- Several factors can impact the lifespan of steel rebars in concrete structures. Firstly, the structure's concrete quality and composition are significant. If the concrete is of low quality or contains harmful chemicals, it can corrode the rebars, leading to a shorter lifespan. During construction, it is essential to properly proportion and cure the concrete mixture. Secondly, the rebars' lifespan is greatly affected by the exposure conditions of the concrete structure. Factors like humidity, temperature fluctuations, and the presence of aggressive substances such as chloride ions or carbon dioxide can accelerate corrosion. Structures in coastal or industrial areas are especially vulnerable due to high salt levels in the air or pollutant presence. Thirdly, the design and construction practices employed have a significant impact on rebars' longevity. Adequate cover thickness, which is the distance between the rebar surface and the concrete's outer face, is crucial. Insufficient cover thickness can result in inadequate corrosion protection. Additionally, effective drainage systems should be incorporated into the design to prevent water accumulation around the rebars, as stagnant moisture accelerates corrosion. Furthermore, maintenance practices also affect rebars' lifespan. Regular inspections, cleaning, and repairs help identify and address issues before they worsen. The application of protective coatings or the use of corrosion inhibitors can also extend rebars' lifespan. Lastly, the type and quality of the rebars themselves are important factors. Rebars with higher carbon and alloying elements are generally more resistant to corrosion. The manufacturing process quality and the presence of impurities can also impact rebars' durability. In conclusion, the lifespan of steel rebars in concrete structures can be influenced by several factors, including concrete quality, exposure conditions, design and construction practices, maintenance, and rebars' quality. Proper attention to these factors ensures the longevity and structural integrity of concrete structures.
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HRB400 Deformed Steel Bar,Reinforced Deformed Steel Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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