GB Standard HRB400 Steel Deformed Bar 18mm/20mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 m.t
- Supply Capability:
- 20000 m.t/month
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Steel Deformed Bar of GB Standard HRB400 Steel Deformed Bar 18mm/20mm
Description:
-Standard: GB
-Material: HRB400
-Specification:
| Diameter(mm) | Section Area(mm2) | Mass(Kg/m) | Length(m) |
| 18 | 254.5 | 2.00 | 9, 12 or as customs' request |
| 20 | 314.2 | 2.47 | 9, 12 or as customs' request |
Chemical Composition(%) of GB Standard HRB400 Steel Deformed Bar 18mm/20mm:
| 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 18mm/20mm:
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) |
≥400 | ≥570 | ≥14 |
Usage and Applications of GB Standard HRB400 Steel Deformed Bar 18mm/20mm:
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 18mm/20mm:
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 18mm/20mm:
*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 is the process of epoxy-coating steel rebars?
- To achieve a durable and corrosion-resistant coating on steel rebars, several steps are involved in the process of epoxy-coating. Here is a general overview of the process: Firstly, the steel rebars undergo thorough surface preparation to eliminate any rust, oil, or other contaminants. This can be accomplished through techniques such as sandblasting or chemical cleaning. Once the rebars are cleaned, a primer is applied to enhance adhesion between the steel surface and the epoxy coating. Additionally, the primer provides an extra layer of protection against corrosion. After the primer has dried, the epoxy coating is applied to the rebars. This can be done using various methods, including spray application or immersing the rebars in an epoxy tank. Following the application of the epoxy coating, the rebars are left to cure. This controlled process allows the coating to harden and fully bond with the steel surface. The curing time varies depending on the specific epoxy and environmental conditions. Once the rebars have cured, a thorough inspection is conducted to ensure the uniform application of the epoxy coating and that it meets the required specifications. This inspection may involve visual checks, adhesion tests, and measurements of coating thickness. After passing inspection, the epoxy-coated steel rebars are packaged and stored in a controlled environment to protect them from damage or further contamination. It is important to note that the specific process may vary depending on factors such as the manufacturer, project requirements, and the type of epoxy coating used. Following industry standards and guidelines is crucial to ensure the quality and effectiveness of the epoxy-coated steel rebars.
- Q: Can steel rebars be used in structures with high electromagnetic shielding requirements?
- To a certain extent, structures with high electromagnetic shielding requirements can make use of steel rebars. Steel is inherently conductive, meaning it can redirect and absorb electromagnetic waves, which is why steel rebars are beneficial for reducing the infiltration of electromagnetic radiation into structures. Nevertheless, it is important to consider that the effectiveness of steel rebars in providing electromagnetic shielding relies on various factors. The thickness and quality of the steel rebars, the design and construction of the structure, and the frequency and intensity of the electromagnetic waves all contribute to determining the level of shielding that can be achieved. In situations where extremely high electromagnetic shielding requirements are necessary, additional measures may be required. These measures may involve the utilization of specialized materials that are specifically designed for electromagnetic shielding, such as conductive coatings or composite materials with high conductivity. Furthermore, it is crucial to take into account the overall design and construction of the structure to ensure that the steel rebars are properly grounded. Proper grounding facilitates the safe channeling and dissipation of electromagnetic energy, preventing the accumulation of potentially hazardous electromagnetic fields. In conclusion, although steel rebars can contribute to electromagnetic shielding in structures, the level of shielding provided can vary depending on multiple factors. For structures with stringent electromagnetic shielding requirements, it is advisable to seek guidance from experts in the field to determine the most suitable materials and construction techniques.
- Q: How do steel rebars contribute to the overall seismic performance of a building?
- Steel rebars contribute to the overall seismic performance of a building by providing reinforcement and strength to the structure. They help resist the forces generated during an earthquake by increasing the ductility and tensile strength of the concrete. This reinforcement prevents the building from collapsing or suffering severe damage during seismic events, making it more resistant to lateral and vertical movements caused by ground shaking.
- Q: What are the common problems associated with steel rebars in construction?
- Steel rebars in construction can pose several common problems. One of the primary concerns is corrosion, as moisture and oxygen can cause rusting, particularly in humid or coastal areas. This rusting weakens the rebars and compromises the structure's integrity. Improper installation is another issue. If rebars are not correctly positioned or adequately secured, they fail to provide the necessary reinforcement and support, leading to safety hazards and structural failures. Concerns also arise regarding the size and spacing of rebars. Inadequate distribution of loads or poor resistance to bending and cracking can occur if the rebars are too small or spaced too far apart. Conversely, if the rebars are too large or closely placed, construction costs increase, and the concrete mix becomes difficult to work with. Poor bonding between the rebar and the concrete poses another challenge. Inadequate contact or bonding between these materials compromises the structure's integrity and reduces the load-bearing capacity of the reinforced concrete. Lastly, the quality of the steel rebars themselves can be problematic. Defects such as impurities or inconsistencies in composition weaken the reinforcement and compromise the overall strength of the structure. To address these issues, it is crucial to use high-quality rebars, adhere to proper installation techniques, and ensure maintenance and protection against corrosion. Regular inspections and testing aid in identifying problems and ensuring the longevity and safety of the reinforced concrete structure.
- Q: Can steel rebars be used in cold weather conditions?
- Cold weather conditions allow for the use of steel rebars. Steel is renowned for its durability and strength, rendering it a viable material for construction endeavors in frigid climates. Nevertheless, when employing steel rebars in cold weather, it is imperative to exercise certain precautions. For instance, it is vital to ensure that the rebars are stored and shielded adequately to prevent corrosion caused by moisture. Moreover, the concrete mixture utilized in conjunction with the rebars must be modified to withstand freezing temperatures and avert cracking. Ultimately, with meticulous planning and adherence to precautions, steel rebars can be employed effectively in cold weather conditions.
- Q: Can steel rebars be used in historical monument conservation?
- Yes, steel rebars can be used in historical monument conservation. They can be used to reinforce and strengthen the structures of historical monuments, ensuring their long-term stability and preservation. However, it is important to use appropriate and compatible materials to maintain the authenticity and historical integrity of the monument. Proper planning, expertise, and consultation with conservation experts are crucial in determining the best approach for incorporating steel rebars in historical monument conservation.
- Q: Are rebar bars = rebar?
- Generally speaking (not absolute circle) steel is usually made of plate steel as the main form of packing, while threads are usually packed in straight strips.Turn left and turn right |
- Q: Can steel rebars be used in structures with high resistance to fatigue?
- Structures with high resistance to fatigue can utilize steel rebars. These rebars are commonly employed as reinforcement in concrete structures due to their durability and high tensile strength. They enhance the strength and support of the concrete, making it more resilient against various loads and stresses, including fatigue. Fatigue occurs when a material weakens due to repeated stress cycles, potentially causing structural failure over time. Steel rebars, particularly those made from high-strength steel, are specifically designed to withstand cyclic loading and offer exceptional resistance to fatigue. With their high fatigue strength, they can endure multiple stress cycles without significant deterioration. In structures with high fatigue resistance, engineers strategically position steel rebars to distribute and dissipate applied loads. This reduces stress concentrations and minimizes the risk of fatigue failure. The reinforcement provided by steel rebars improves the overall structural integrity and longevity of the construction. Furthermore, the use of steel rebars allows for the implementation of various design techniques, including the inclusion of additional reinforcing elements like stirrups and tie hooks. These elements further enhance the structure's resistance to fatigue. By considering these design considerations, steel rebars effectively mitigate the effects of cyclic loading and maintain the structure's stability and performance over time. However, it is important to note that the fatigue resistance of a structure does not solely rely on steel rebars. Other factors, such as the quality of concrete, proper detailing and placement of rebars, and adherence to proper construction practices, also impact the overall fatigue performance. Therefore, it is crucial to adopt a comprehensive approach that incorporates appropriate design, material selection, and construction techniques to achieve structures with high resistance to fatigue.
- Q: Can steel rebars be used in sustainable construction practices?
- Yes, steel rebars can be used in sustainable construction practices. They are commonly used in reinforced concrete structures, which have a long lifespan and can be recycled at the end of their life. Additionally, steel rebars can contribute to the overall strength and durability of a building, reducing maintenance and replacement needs. Furthermore, using steel rebars can enhance the energy efficiency of a structure by providing thermal mass, which helps in reducing heating and cooling requirements.
- Q: How do steel rebars help in load distribution within a structure?
- Steel rebars, also referred to as reinforcing bars, are essential for the distribution of loads within a structure. They are extensively utilized in concrete structures, like buildings, bridges, and highways, to enhance their strength and durability. The main objective of steel rebars is to provide tensile strength to the concrete. While concrete is highly capable of withstanding compression, it is relatively frail when it comes to tension. Any structure exposed to loads, whether from the weight of the building itself or external forces, will encounter both compression and tension forces. By incorporating steel rebars into the concrete, they act as reinforcements and resist tensile forces. When an external load is applied to the structure, the rebars bear a significant portion of the generated tension forces. This prevents the concrete from cracking or failing under the applied load. Furthermore, steel rebars aid in the distribution of the load throughout the structure. When a load is imposed on a structure, it generates stress that is spread across the various components. The presence of rebars enables a more uniform distribution of these stresses, reducing the concentration of forces in specific areas. This prevents localized failures and ensures that the load is evenly dispersed across the structure, thereby improving its overall strength and stability. Another crucial aspect of steel rebars is their capacity to bond with concrete. The rough surface of the rebars prevents them from slipping or separating from the concrete, ensuring a robust bond between the two materials. This bond further enhances the distribution of loads by enabling the rebars to effectively transfer the tensile forces to the surrounding concrete. In conclusion, steel rebars play a critical role in the distribution of loads within a structure. They furnish the necessary tensile strength to withstand tension forces, distribute the load evenly across the structure, and bond with the concrete, guaranteeing a sturdy and stable construction. Without steel rebars, concrete structures would be considerably weaker and more prone to cracking or failure under load.
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GB Standard HRB400 Steel Deformed Bar 18mm/20mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 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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