Steel rebar Grade HRB400 for Construction
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
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Specification
Steel rebar is metal bars often used in construction for pouring concrete or supporting walls and columns. The rebar can
be smooth, though they are frequently manufactured with deformations that create greater texture to which concrete can
adhere, creating a stronger bond that helps prevent cracking of concrete. These deformations do not create weaknesses in
the rebar, and when rebar is measured to determine its diameter, it is typically measured at the narrowest point. Strength
grades indicate the amount of pressure the steel rebar can withstand, and grade and diameter are typically presented in both
imperial and metric units.
Features
1、Pure steel quality, stable chemical contents, small tolerance.
2、Constant Quality, good drawing performance.
3、High dimension accuracy degree, accuracy degree of Level C up to 80%, smooth surface, less scale, easy to be pickled.
4、Automatic bundling with 4 lines by Machine in tidy and good looks
5、Big high quality percentage, small coil percentage, and heavy coil weight for Hard Coil.
6、High sorbitizing percentage.
Product Description :
Chemical composition (%): | Steel | C | Si | Mn | P | S | Ceq | ||||
HRB335 |
0.25 |
0.80 |
1.60 |
0.045 |
0.045 | 0.52 | |||||
HRB400 | 0.54 | ||||||||||
HRB500 | 0.55 | ||||||||||
Mechanical properties | Steel | Rel/ MPa | Rm/ MPa | A/ % | Agt/ % | ||||||
≥ | |||||||||||
HRB335 | 335 | 455 | 17 |
7.5 | |||||||
HRB400 | 400 | 540 | 16 | ||||||||
HRB500 | 500 | 630 | 15 | ||||||||
Package: | Standard export packing or as customer's request | ||||||||||
Application: | Construction, building, bridge, road. ect | ||||||||||
Payment terms | 1).100% irrevocable L/C at sight. | ||||||||||
Delivery time | 15-30 days after receipt of L/C or deposit by T/T | ||||||||||
Packing:
In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.
Our service
(1) We cooperate with famous factories with advanced equipment and well trained workers.
(2) We can provide factory price with trading company service.
(3) We continuously work on the improvement of our processes, guaranteeing consistently high standards
of quality to keep none compensation.
(4) We guarantee 24 hours response and 48 hours solution providing service.
(5) We accept small order quantity before formal cooperation.
(6) We deliver the agreed quality at the agreed time, reacting to changes in customer wishes in a flexible way.
(7) Due to our volume and selling power, we have excellent freight rates with shipping lines.
(8) We strive to always be fair and honest in our dealings with customers.
(9) We strive to work together with customers to achieve much more than we can achieve alone.
(10) Through our passion and commitment we aim to be a market leader in all our key markets. To maintain
our position as market leader we must continue to add value in all that we do.
FAQ:
1.Q: What's your MOQ(minimum order quantity)?
A: One full container, mixed acceptable .
2. Q: What's your packing methods?
A: Packed in bundle or bulk ..
3. Q: How can I buy CNBM products in my country?
A:Please send us an inquiry or email ,we will reply to you if there is distributor in your country
4. Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
5. Q: How long does it take to get the product if i place an order?
A:With the process of your requirements,we will pack and deliver in 3-7 days. If it is by sea shipment,it will take 15-45 days depending on different locations
- Q: What is the process of connecting steel rebars to structural members?
- To establish a secure and dependable connection, several steps are involved in connecting steel rebars to structural members. To begin with, the structural member's design specifications necessitate the precise positioning of the long, ridged or deformed steel bars called rebars. This is typically accomplished by using spacers or chairs to maintain the appropriate spacing between the rebars and the surrounding formwork. Following that, the rebars are connected to the structural member through various means. A common method is lap splicing, where the rebars overlap for a designated distance and are then tied together using wire or mechanical connectors. The length of the overlap is determined by engineering calculations to ensure adequate strength and load transfer. Another approach involves the use of pre-fabricated mechanical couplers, which provide a dependable connection between the rebars. These couplers are designed to securely grip the rebars and effectively transfer the load. They offer advantages such as quicker installation, reduced labor costs, and enhanced structural integrity. In addition to splicing, the rebars may also need to be anchored or hooked into the structural member. Anchoring involves extending the rebar's length beyond the connection point and bending it back into the concrete to create a hook shape. This provides additional resistance against pull-out forces. Throughout the process, it is crucial to ensure that the rebars are clean, free from rust, and properly aligned. Any contaminants or misalignments can weaken the connection and compromise the structural integrity. Therefore, comprehensive inspection and quality control measures are essential to ensure a successful connection. Overall, the process of connecting steel rebars to structural members requires meticulous planning, precise positioning, proper splicing or coupling, and thorough inspection. By following these steps, a robust and long-lasting connection can be achieved, guaranteeing the safety and stability of the structure.
- Q: How are steel rebars used in water treatment plants?
- Steel rebars are used in water treatment plants to reinforce the concrete structures, such as tanks and pipelines, that are essential for the treatment and transportation of water. The rebars provide strength and stability to these structures, ensuring their durability and ability to withstand the harsh conditions and pressures involved in the water treatment process.
- 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: Are steel rebars suitable for use in foundation structures?
- Yes, steel rebars are suitable for use in foundation structures. Steel rebars, also known as reinforcing bars, are commonly used in concrete construction to provide strength and reinforcement to the structure. The use of steel rebars in foundation structures helps to increase the load-bearing capacity and durability of the foundation. Steel rebars are made from steel, which has high tensile strength and is resistant to corrosion, making it an ideal material for use in foundation structures. The rebars are placed in the concrete during construction, providing additional strength and preventing cracks or fractures in the foundation. They help to distribute the load evenly throughout the foundation, reducing the risk of settlement or failure. Furthermore, steel rebars can be easily customized to meet the specific requirements of the foundation structure. They come in various sizes, shapes, and grades, allowing for flexibility in design and construction. This versatility makes steel rebars suitable for use in different types of foundation structures, including residential, commercial, and industrial buildings. Overall, steel rebars are a reliable and cost-effective choice for reinforcing foundation structures. They enhance the structural integrity and longevity of the foundation, ensuring a solid and stable base for the entire building.
- Q: What are the guidelines for proper splicing of steel rebars in concrete structures?
- Ensuring the structural integrity and safety of concrete structures requires strict adherence to guidelines for splicing steel rebars. The following are key guidelines to follow: 1. Lap Splicing Length: The overlapping distance between rebars, known as lap splicing length, must adhere to the design plans or structural codes. Typically, minimum lap lengths are specified as a multiple of rebar diameter, such as 40 times for tension members and 25 times for compression members. 2. Cleanliness: Prior to splicing, rebars must be thoroughly cleaned to remove rust, scale, dirt, and other contaminants. Proper cleaning guarantees a strong bond during splicing. 3. Proper Alignment: Rebars to be spliced should be aligned correctly to maintain reinforcement continuity. Misalignment can cause stress concentration and weaken the structure. The bars should be parallel, evenly spaced, and in a straight line. 4. Splice Type: Various splice connections, including lap splicing, mechanical splicing, and welded splicing, are available. The choice of splice type should consider project requirements, structural design, and local building codes. 5. Reinforcement Bar Preparation: Before splicing, rebars should be prepared by removing scale, rust, and other contaminants. This can be achieved through brushing, grinding, or shot blasting. Additionally, the bar ends must be clean and free of deformations or irregularities. 6. Testing and Inspection: Regular testing and inspection are crucial to ensure the quality and integrity of spliced rebars. Non-destructive testing methods like ultrasound or magnetic particle testing can be used to check bond strength and ensure correct splicing. 7. Adequate Cover: Spliced rebars require sufficient concrete cover to protect against corrosion and fire. The concrete cover thickness should comply with local building codes and design specifications. 8. Proper Grouting: When using mechanical splices, ensure proper grouting or filling of splice sleeves or couplers with approved non-shrink grout. This ensures full load transfer and prevents rebars from moving or slipping. 9. Documentation: All splicing activities should be thoroughly documented, including the splice type, lap lengths, inspection reports, and any deviations from the original design. This documentation is important for future reference, maintenance, and regulatory compliance. These guidelines serve as general recommendations, and project-specific requirements and local building codes must always be followed. Consulting a qualified structural engineer or reputable construction professional is vital to ensure the highest standards of safety and compliance.
- Q: How are steel rebars connected to each other in a reinforced concrete structure?
- Steel rebars are typically connected to each other in a reinforced concrete structure through a process called rebar splicing. This involves overlapping the rebars and securing them together using mechanical couplers, welding, or by using threaded connections. These connections ensure that the rebars work together to provide the necessary strength and stability to the structure.
- Q: How do steel rebars affect the construction cost of high-rise buildings?
- High-rise buildings' construction costs are significantly influenced by steel rebars. These reinforced steel bars are vital for providing strength and stability to the structure, particularly in high-rise buildings that face greater structural loads. To begin with, the cost of steel rebars can make up a substantial portion of the overall construction budget. Market fluctuations affect steel rebars' prices, meaning any increase in steel prices can directly impact construction costs. Additionally, high-rise buildings typically require a higher quantity and quality of rebars compared to low-rise structures, further increasing the overall cost. Furthermore, the installation of steel rebars adds to the construction cost due to the need for skilled labor and specialized equipment. Reinforcing concrete with steel rebars necessitates careful planning, precise placement, and adherence to construction codes and safety standards. Hiring experienced and qualified workers results in higher labor costs. Moreover, the use of steel rebars enhances the durability and longevity of high-rise buildings. By reinforcing the structure, rebars improve the building's structural integrity, making it more resistant to forces like earthquakes, wind, and vibrations. This reduces maintenance and repair costs over the building's lifespan, making the initial investment in steel rebars worthwhile. Lastly, steel rebars impact the overall construction timeline and project schedule. As a critical component of the building's structure, installing rebars is typically time-consuming. Delays or errors in this process can lead to project delays and additional costs. Therefore, proper planning, coordination, and supervision are necessary to ensure the efficient and timely installation of rebars, minimizing any potential cost overruns. In conclusion, steel rebars play a crucial role in high-rise building construction, significantly impacting the overall cost. Despite the direct costs of rebars, labor, and specialized equipment, their use ultimately enhances the building's strength, durability, and longevity. Considering the long-term benefits and the importance of structural integrity, including steel rebars is necessary, despite their impact on construction costs.
- Q: How are steel rebars tested for quality and strength?
- Quality and strength of steel rebars are assessed through a series of standardized tests, ensuring adherence to required standards and ability to withstand anticipated loads and stresses. A primary test is the Tensile Test, which measures the maximum stress a rebar can endure before breaking. A sample rebar is pulled until it fractures, and the force needed to cause this fracture is measured. This test offers valuable data about the rebar's ultimate tensile strength, yield strength, and elongation. Another critical examination is the Bend Test, which evaluates the rebar's ductility and ability to resist breaking when bent. A sample rebar is bent to a specific angle, and any cracks or fractures are closely inspected. If there are no indications of failure, the rebar is considered acceptable. Furthermore, Chemical Analysis is performed to determine the rebar's chemical composition. This test ensures compliance with required chemical composition standards, as variations can impact the rebar's strength and durability. The Dimensional Test is conducted to verify that the rebar meets the specified standards in terms of dimensions, weight, and shape. Deviations from the required measurements can compromise the rebar's structural integrity. Additionally, the rebar's Surface Condition is visually evaluated to identify signs of rust, cracks, or other defects that could affect its performance. Proper surface condition is crucial for ensuring effective bonding with the surrounding concrete. Lastly, certain rebars undergo Non-Destructive Testing, such as ultrasonic testing or magnetic particle inspection, to identify hidden defects or cracks that may not be visible to the naked eye. In conclusion, these testing methods guarantee that steel rebars possess the necessary quality and strength for use in construction projects, providing essential reinforcement for reinforced concrete structures.
- Q: Are there any limitations on using steel rebars in cold climates?
- Using steel rebars in cold climates comes with certain limitations. The primary concern is the possibility of corrosion caused by moisture, salt, and de-icing chemicals commonly applied to roads and bridges during winter. Exposure to these elements can lead to rusting and gradual weakening of steel rebars, compromising the concrete's structural integrity. To address this issue, there are several measures that can be taken. One common approach is the use of epoxy-coated rebars, which offer protection against moisture and chemicals. Another option is to utilize stainless steel rebars, as they have high resistance to corrosion. However, it is worth noting that these alternatives can be more expensive compared to traditional steel rebars. Additionally, the construction process in cold climates presents its own set of challenges. Low temperatures result in slower curing and strengthening of concrete, which can affect the overall project timeline. To ensure proper curing, special precautions such as heating the concrete or using accelerators may be necessary. To guarantee compliance and safety, it is crucial to consult local building codes and regulations that are specific to cold climates. Seeking guidance from engineering professionals experienced in cold weather construction practices can provide valuable insights and recommendations to address the limitations associated with using steel rebars in these conditions.
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Steel rebar Grade HRB400 for Construction
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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