GB Standard HRB400 Steel Deformed Bar 10mm/12mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25 m.t
- Supply Capability:
- 20000 m.t/month
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GB Standard HRB400 Steel Deformed Bar 10mm/12mm
Description:
-Standard: GB
-Material: HRB400
-Specification:
| Diameter(mm) | Section Area(mm2) | Mass(Kg/m) | Length(m) |
| 10 | 78.54 | 0.617 | 9, 12 or as customs' request |
| 12 | 113.1 | 0.888 | 9, 12 or as customs' request |
Chemical Composition(%) of GB Standard HRB400 Steel Deformed Bar 10mm/12mm:
| C | Mn | Si | S | P | V |
| ≤0.25 | ≤1.60 | ≤0.08 | ≤0.045 | ≤0.045 | 0.04-0.12 |
Mechanical Properties of GB Standard HRB400 Steel Deformed Bar 10mm/12mm:
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) |
≥400 | ≥570 | ≥14 |
Usage and Applications of GB Standard HRB400 Steel Deformed Bar 10mm/12mm:
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 GB Standard HRB400 Steel Deformed Bar 10mm/12mm:
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 GB Standard HRB400 Steel Deformed Bar 10mm/12mm:
*If you would like to get our price, please inform us the size, standard/material and quantity. Thank you very much for your attention.
- Q: What are the factors that can cause steel rebars to corrode prematurely?
- There are several factors that can contribute to the premature corrosion of steel rebars. These include exposure to moisture, high levels of chloride ions, carbonation of concrete, inadequate concrete cover, poor quality of concrete or protective coatings, and the presence of other aggressive chemicals such as sulfates or acids. Environmental conditions, such as high humidity, coastal areas, or industrial environments, can also accelerate the corrosion process. Additionally, improper construction practices, such as inadequate compaction or curing of concrete, can lead to the initiation and progression of corrosion in steel rebars.
- 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 reinforced masonry walls?
- Reinforced masonry walls often incorporate steel rebars to boost their strength and longevity. It is a common practice to employ steel rebars in the construction of these walls. The rebars are typically inserted into the mortar joints between the masonry units, such as bricks or concrete blocks. They serve to distribute any tensile forces that may arise in the masonry wall as a result of external loads or structural movements. Masonry materials are inherently strong in compression but weak in tension, so the addition of steel rebars helps fortify the structure. By incorporating steel rebars, the reinforced masonry walls become more resistant to lateral forces like wind or seismic loads, thereby reducing the likelihood of cracks or structural failures. Furthermore, the use of steel rebars enhances the overall stability and load-bearing capacity of the masonry wall, making it suitable for a wide array of construction projects.
- Q: What factors affect the cost of steel rebars?
- The factors that affect the cost of steel rebars include the price of raw materials such as iron ore and scrap metal, the cost of production and manufacturing processes, transportation and logistics expenses, market demand and supply dynamics, currency exchange rates, and any applicable tariffs or trade policies. Additionally, economic factors such as inflation, interest rates, and overall market conditions can also impact the cost of steel rebars.
- Q: What are the factors that can cause corrosion in steel rebars?
- There are several factors that can contribute to the corrosion of steel rebars. Firstly, exposure to moisture and oxygen is a significant factor in the corrosion process. When moisture comes into contact with the surface of the steel rebar, it initiates an electrochemical reaction with the oxygen in the air, leading to the formation of rust. This reaction is accelerated in environments with high humidity or constant exposure to water, such as coastal areas or structures submerged in water. Another factor that can cause corrosion is the presence of chloride ions. Chlorides, commonly found in seawater, deicing salts, or industrial environments, can penetrate the protective oxide layer on the steel rebar, making it more susceptible to corrosion. Once the chloride ions reach the metal surface, they initiate the breakdown of the passive film, allowing the corrosion process to occur more rapidly. The pH level of the environment is also crucial. Steel rebars are more prone to corrosion in highly acidic or alkaline conditions. Acidic environments, such as those found in industrial areas with high air pollution or chemical exposure, can rapidly corrode the steel. On the other hand, alkaline conditions, often found in concrete structures due to the presence of cement, can lead to the formation of a highly alkaline environment on the surface of the rebar, causing the breakdown of the protective oxide layer and promoting corrosion. Additionally, the presence of other contaminants or impurities can accelerate the corrosion process. Sulfur compounds, for example, can react with the steel rebar, leading to the formation of sulfide corrosion products that weaken the structure. Similarly, exposure to certain organic compounds or acids can also contribute to corrosion. Lastly, the design and maintenance of structures can also play a role in the corrosion of steel rebars. Insufficient concrete cover or poor quality concrete can allow moisture and oxygen to reach the steel more easily, increasing the likelihood of corrosion. Lack of proper maintenance, such as failure to repair cracked or damaged concrete, can also lead to water infiltration and subsequent corrosion of the rebars. In conclusion, factors such as moisture and oxygen exposure, chloride ions, pH level, presence of contaminants, and inadequate design or maintenance can all contribute to the corrosion of steel rebars. Understanding and addressing these factors is crucial in ensuring the durability and longevity of structures that incorporate steel rebars.
- Q: How do steel rebars contribute to the overall structural integrity of a building?
- Steel rebars contribute to the overall structural integrity of a building by providing reinforcement to concrete structures. They enhance the strength and durability of concrete by withstanding tensile forces, which concrete alone is not able to withstand. This reinforcement system helps distribute and resist the loads and stresses acting on the building, increasing its resistance to bending, cracking, and collapsing. Ultimately, steel rebars ensure that the building can withstand various external forces, such as wind, earthquakes, and heavy loads, thereby ensuring the overall stability and safety of the structure.
- Q: What are the different grades of steel rebars available in the market?
- There are several grades of steel rebars available in the market, including Grade 40, Grade 60, and Grade 75. These grades indicate the minimum yield strength of the rebars, with Grade 40 having a yield strength of 40,000 pounds per square inch (psi), Grade 60 having a yield strength of 60,000 psi, and Grade 75 having a yield strength of 75,000 psi. The choice of grade depends on the specific application and structural requirements.
- 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: Are steel rebars suitable for use in aggressive environments?
- Indeed suitable for use in aggressive environments are steel rebars. Commonly utilized in construction projects, particularly in reinforced concrete structures, steel rebars possess high tensile strength and durability. However, when exposed to corrosive elements like moisture, chloride ions, and chemicals, corrosion may occur, leading to weakened rebars and compromised structural integrity of the concrete. To counteract this issue, protective materials such as epoxy or zinc are often applied to steel rebars, creating a barrier against corrosion. Moreover, stainless steel rebars, with their superior corrosion resistance properties, are also employed in aggressive environments. In conclusion, although steel rebars generally prove suitable for aggressive environments, it is essential to consider specific conditions and implement appropriate protective measures to prevent corrosion and uphold the longevity of the reinforced concrete structure.
- Q: Can steel rebars be used in structures with heavy dynamic loads?
- Structures with heavy dynamic loads can indeed make use of steel rebars. In reinforced concrete structures, steel rebars are commonly employed to enhance tensile strength and improve overall structural integrity. Their specific design enables them to withstand heavy loads, including dynamic ones caused by vibrations, earthquakes, or moving vehicles. The remarkable tensile strength of steel rebars allows for effective absorption and distribution of dynamic loads, effectively preventing structural failure or collapse. Moreover, steel rebars exhibit exceptional resistance to fatigue, thereby maintaining their strength and integrity even under repeated loading and unloading cycles. To ensure optimal performance under heavy dynamic loads, engineers take into account various factors, such as the size, shape, and spacing of rebars, as well as the quality of the concrete and the design of the structure itself. By meticulously designing and reinforcing the structure with steel rebars, it becomes possible to create a building that is both safe and durable, capable of withstanding heavy dynamic loads.
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GB Standard HRB400 Steel Deformed Bar 10mm/12mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25 m.t
- Supply Capability:
- 20000 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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