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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Specification
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: What are the common defects or issues associated with steel rebars?
- Steel rebars can encounter various defects or issues, including the following: 1. Rust: When exposed to moisture or corrosive substances, steel rebars are prone to rusting. This rust weakens their load-bearing capacity and compromises the structural integrity of the reinforced concrete. 2. Poor bonding with concrete: Inadequate cleaning or the presence of rust can prevent rebars from bonding well with the concrete. This can result in reduced strength and durability of the reinforced concrete structure. 3. Incorrect size or shape: Structural problems can arise from rebars that are improperly sized or shaped. For instance, rebars that are too short or have insufficient coverage might not provide enough reinforcement, making the structure susceptible to cracking or collapse. 4. Improper placement: Weak points in the reinforced concrete can occur due to incorrect rebar placement. This can happen when rebars are not adequately spaced, aligned, or when there are gaps between the rebar and the concrete. 5. Inappropriate storage and handling: To prevent rust, it is crucial to store rebars in a dry and well-ventilated area. Improper storage or handling can lead to surface damage, bending, or twisting of the rebars, affecting their performance in reinforced concrete. 6. Welding defects: Welded rebars may have defects such as insufficient fusion, cracks, or lack of penetration. These defects can compromise the strength and integrity of the reinforcement. 7. Overlapping issues: Overlapping rebars is a common practice to ensure reinforcement continuity. However, improper overlapping, such as insufficient overlap length or inadequate lapping of rebars, can result in weak joints and reduced structural strength. 8. Quality control concerns: Defects or issues in rebars can arise from inadequate quality control during manufacturing or installation. This can encompass problems like improper chemical composition, inadequate strength, or deviations from specified standards. Addressing and rectifying these defects or issues during the design, manufacturing, and construction stages is crucial to ensure the safe and reliable performance of reinforced concrete structures. Regular inspection, maintenance, and adherence to industry standards and guidelines are essential in mitigating these common issues associated with steel rebars.
- Q: What is the process of testing the quality of steel rebars?
- The process of testing the quality of steel rebars involves several steps. First, the rebars are visually inspected for any surface defects, such as cracks or corrosion. Then, they are subjected to various mechanical tests, including tensile strength and elongation tests, to determine their mechanical properties. Additionally, rebars are checked for their dimensional accuracy, weight, and straightness. Finally, chemical composition analysis is conducted to ensure that the steel meets the required standards and specifications. Overall, this comprehensive testing process helps ensure the quality and reliability of steel rebars for use in construction and other applications.
- Q: How do steel rebars affect the overall fire resistance of a structure?
- Steel rebars, which are commonly used in reinforced concrete structures, play a significant role in enhancing the overall fire resistance of a building. The presence of steel rebars provides structural stability and prevents the collapse of a building during a fire event. Steel is inherently fire-resistant and has a high melting point. When exposed to fire, the steel rebars heat up gradually, allowing them to maintain their integrity and structural strength. The slow heat transfer property of steel helps in preventing the spread of fire and slows down the rate at which the temperature rises. Moreover, the thermal conductivity of steel rebars is relatively lower compared to other construction materials, such as concrete. This property enables the steel rebars to act as a heat sink, absorbing and dissipating heat away from the vulnerable areas of the structure. By doing so, the rebars help in reducing the overall temperature within the building, thus extending the time before the critical temperature for structural failure is reached. Additionally, the presence of steel rebars in the concrete matrix creates a composite structure that benefits from the concrete's fire-resistant properties. Concrete has a high heat capacity and is known for its ability to resist fire and heat transfer. The combination of steel rebars and concrete creates a synergistic effect, enhancing the fire resistance of the structure. Furthermore, steel rebars contribute to the overall fire resistance by improving the load-bearing capacity of a building during a fire. The structural integrity provided by the steel rebars helps in maintaining the stability of the structure, preventing structural collapse, and facilitating safer evacuation. In conclusion, steel rebars have a positive impact on the overall fire resistance of a structure. They provide structural stability, slow down the rise in temperature, act as a heat sink, and enhance the load-bearing capacity. The combination of steel rebars and concrete creates a fire-resistant composite structure, thereby improving the safety and integrity of the building during a fire event.
- Q: Are there any restrictions on the use of steel rebars in certain regions?
- Yes, there can be restrictions on the use of steel rebars in certain regions due to building codes, regulations, and safety standards. These restrictions are typically implemented to ensure structural integrity, prevent corrosion, and comply with seismic requirements. It is important to consult local authorities and construction guidelines to determine specific restrictions in a particular region.
- Q: How do steel rebars affect the overall construction cost of residential buildings?
- The overall construction cost of residential buildings can be significantly influenced by steel rebars. To begin with, steel rebars play a vital role in reinforced concrete structures by adding strength and durability. However, the cost of steel rebars can vary depending on factors such as size, grade, and the quantity required for the project. The inclusion of steel rebars in residential buildings can lead to increased construction costs due to expenses related to their purchase and installation. The cost of steel itself is subject to market fluctuations and can change over time. Furthermore, the complexity of the design and the amount of reinforcement needed can also impact the overall cost. Moreover, the installation of steel rebars involves skilled labor, which further contributes to construction expenses. The process of cutting, bending, and placing rebars requires expertise and precision, which adds to the cost of labor. Additionally, the time required for proper installation can affect the construction schedule, potentially resulting in additional expenses if there are delays. However, it is important to note that although steel rebars may initially increase the upfront construction cost of residential buildings, their long-term benefits outweigh the initial expenses. Reinforced concrete structures with steel rebars offer improved resistance against structural failures, such as cracking or collapsing, which can save significant costs in terms of future repairs and maintenance. In conclusion, steel rebars are essential components in residential construction as they enhance the strength and durability of reinforced concrete structures. While their use may increase the initial construction cost, the long-term advantages in terms of structural integrity and reduced maintenance expenses justify their inclusion in residential building projects.
- Q: Are there any specific guidelines for storing steel rebars on-site?
- Yes, there are specific guidelines for storing steel rebars on-site. These guidelines typically include keeping the rebars off the ground using racks or pallets, ensuring proper alignment and support to prevent bending or warping, protecting them from moisture and corrosion by covering with waterproof material, and organizing them in a way that allows easy access and identification. It is also important to follow any manufacturer recommendations and local building codes for safe storage of steel rebars.
- Q: Can steel rebars be used in structures subjected to chemical exposure?
- Steel rebars can be used in structures subjected to chemical exposure, but their suitability depends on the specific type and concentration of chemicals involved. In general, stainless steel rebars or epoxy-coated rebars are preferred for such applications as they provide better resistance to corrosion and chemical attack compared to plain carbon steel rebars. However, it is important to conduct a thorough evaluation of the chemical environment and consult with experts to determine the most appropriate rebar material for the specific structure and its intended use.
- Q: What are the factors to consider while designing with steel rebars?
- There are several factors to consider while designing with steel rebars. 1. Strength and durability: The rebars should be selected based on the required strength and durability to withstand the anticipated loads and environmental conditions. 2. Size and shape: The size and shape of the rebars should be chosen to ensure proper placement, spacing, and anchorage within the concrete structure. 3. Corrosion resistance: The rebars should have adequate corrosion resistance, especially in environments where they may be exposed to moisture or chemicals. This can be achieved through proper material selection or by applying protective coatings. 4. Bond strength: The bond between the rebars and the concrete is crucial for transferring loads. The design should consider the factors that influence bond strength, such as surface roughness, bar diameter, and the use of proper concrete cover. 5. Construction constraints: The design should take into account any construction constraints, such as limitations in handling and placing the rebars, and ensure that the design is feasible and practical to implement. 6. Code compliance: Designing with steel rebars should adhere to relevant building codes and standards to ensure structural safety and regulatory compliance. By considering these factors, designers can create robust and reliable structures that effectively utilize the strength and versatility of steel rebars.
- Q: Can steel rebars be used in the construction of residential towers?
- Yes, steel rebars can be used in the construction of residential towers. Steel rebars provide strength and durability to reinforced concrete structures, making them an ideal choice for high-rise buildings like residential towers. They help reinforce the concrete and enhance its load-bearing capacity, ensuring the structural integrity and safety of the construction.
- Q: Can steel rebars be used in combination with other reinforcement materials?
- Yes, steel rebars can be used in combination with other reinforcement materials such as fibers, wire mesh, or carbon fiber sheets to enhance the overall strength and durability of concrete structures. This combination of reinforcement materials provides a more effective solution for reinforcing concrete and can meet specific project requirements.
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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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