High Quality Steel Deformed Bar HRB400 25/28/32mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 m.t
- Supply Capability:
- 10000 m.t/month
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High Quality Steel Deformed Bar HRB400 25/28/32mm
Product Description:
Specifications of High Quality Steel Deformed Bar HRB400 25/28/32mm:
Standard | GB | HRB400 | |
Diameter | 25mm,28mm,32mm | ||
Length | 6M, 12M | ||
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 High Quality Steel Deformed Bar HRB400 25/28/32mm: (Please kindly find our chemistry of our material based on HRB400 as below for your information)
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 | |||||
Theoretical weight and section area of High Quality Steel Deformed Bar HRB400 25/28/32mm as below for your information:
Diameter(mm) | Section area (mm²) | Mass(kg/m) | Weight of 12m bar(kg) |
25 | 490.9 | 3.85 | 46.2 |
28 | 615.8 | 4.83 | 57.96 |
32 | 804.2 | 6.31 | 75.72 |
Usage and Applications of High Quality Steel Deformed Bar HRB400 25/28/32mm:
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 High Quality Steel Deformed Bar HRB400 25/28/32mm:
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
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will arrange production. The shipping date is dependent upon the quatity, how many sizes you want and the plan of production, but is typically 1 month to 2 month days from the beginning of production.
Images of High Quality Steel Deformed Bar HRB400 25/28/32mm:
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- Q: 4E DG 164 is a steel grade 3 steel, DG steel, E is what mean
- Individual numbers 3, 4 and 5 indicate strength levels of steel bars 335MPa, 400MPa and 500MPa, characters 3E, 4E and 5E, respectively, and mark the corresponding strength levels of seismic reinforcement. C3, C4 and C5 mark fine grained reinforcing steel bars of corresponding strength grade, and C3E, C4E and C5E identify fine grain reinforced steel bars of corresponding strength grade.
- Q: What are the common quality control tests for steel rebars?
- Steel rebars undergo several quality control tests to ensure they meet industry standards and specifications. These tests assess the rebars' physical, mechanical, and chemical properties to guarantee their durability and performance. Common quality control tests for steel rebars include: 1. Tensile Test: This test determines the rebars' tensile strength, yield strength, and elongation. It involves gradually applying force to the rebar until it breaks, measuring the maximum force it can withstand. 2. Bend Test: This test evaluates the rebars' ability to withstand bending without cracking. The rebar is bent to a specific angle and inspected for visible cracks. 3. Chemical Composition Analysis: This test determines the rebars' chemical composition, ensuring they meet required standards. It involves analyzing the levels of carbon, manganese, phosphorus, sulfur, and other elements. 4. Visual Inspection: This test visually examines the rebars for surface defects like cracks or irregularities that could impact structural integrity. 5. Dimensional Inspection: This test verifies the rebars' dimensions and shape, checking for deviations from specified requirements. Instruments are used to measure diameter, length, and shape. 6. Weldability Test: If the rebars will be welded, a test is performed to assess their suitability for welding. The quality of the weld joint, including strength and brittleness, is evaluated. 7. Corrosion Resistance Test: This test determines the rebars' resistance to corrosion, which is crucial for long-term durability. It involves subjecting the rebars to accelerated corrosion conditions and assessing their resistance. These tests are essential in ensuring the quality and reliability of steel rebars used in construction projects. Manufacturers and inspectors can identify non-compliant or substandard rebars through these tests, ensuring the safety and structural integrity of buildings and infrastructure.
- Q: How are steel rebars protected against alkali attacks?
- Steel rebars are protected against alkali attacks through the use of various techniques and materials. One common method is to apply a protective coating on the surface of the rebars. This coating acts as a barrier, preventing direct contact between the alkaline environment and the steel. Some commonly used coatings include epoxy, zinc, and polyethylene. These coatings are designed to be durable and provide long-term protection against alkali attacks. Another method of protection is through the use of corrosion inhibitors. These inhibitors are added to the concrete mixture during construction. They work by reducing the corrosive effects of alkali on the steel rebars. Corrosion inhibitors form a protective film on the surface of the steel, preventing the alkali from reaching the rebar and causing damage. In addition to coatings and corrosion inhibitors, proper concrete mix design can also play a significant role in protecting rebars against alkali attacks. By optimizing the composition of the concrete mix, engineers can reduce the alkalinity of the environment surrounding the rebars. This helps to minimize the risk of alkali attacks and subsequent corrosion. Regular maintenance and inspection of structures is crucial in ensuring the continued protection of steel rebars against alkali attacks. Monitoring the condition of the rebars and taking prompt action in case of any signs of corrosion or damage is essential for their long-term durability. Overall, a combination of protective coatings, corrosion inhibitors, proper concrete mix design, and regular maintenance are key factors in safeguarding steel rebars against alkali attacks. By implementing these measures, the lifespan and structural integrity of concrete structures can be significantly extended.
- Q: What are the factors that determine the spacing of steel rebars in a concrete structure?
- The spacing of steel rebars in a concrete structure relies on various factors that guarantee the concrete's structural integrity and strength. These factors encompass: 1. Structural Design: The spacing of rebars is influenced by the structural design requisites and specifications of the concrete structure. Engineers take into account the loads, stresses, and forces that the structure will endure and compute the necessary reinforcement spacing accordingly. 2. Concrete Strength: The concrete's strength used in the structure is a pivotal determinant in establishing rebar spacing. Higher-strength concrete may necessitate closer spacing of rebars to provide ample reinforcement and prevent cracking or failure under load. 3. Rebar Diameter: The diameter of the steel rebars also contributes to determining the spacing. Thicker or larger diameter rebars may require wider spacing, while thinner rebars typically necessitate closer spacing to deliver the desired reinforcement. 4. Bar Bending and Placing: The ease of bending and placing the rebars during construction is another crucial factor. Often, practical considerations dictate the spacing, such as guaranteeing proper access for workers and equipment and facilitating the concrete pouring process. 5. Environmental Factors: Environmental conditions, including exposure to corrosive substances or extreme weather conditions, can impact rebar spacing. Closer spacing may be necessary in corrosive environments to provide additional protection against rust and deterioration. 6. Building Codes and Regulations: Local authorities or relevant organizations establish building codes and regulations that set the minimum requirements for rebar spacing in concrete structures. These codes ensure compliance with safety standards and offer guidelines for construction practices. In conclusion, the spacing of steel rebars in a concrete structure is a crucial aspect in ensuring its strength, durability, and resilience. It relies on a combination of factors, including structural design, concrete strength, rebar diameter, construction practicalities, environmental considerations, and adherence to building codes and regulations.
- Q: How do steel rebars affect the overall durability of concrete?
- Concrete structures benefit greatly from the presence of steel rebars, as they significantly contribute to their overall durability. Steel rebars enhance the strength of concrete and its ability to resist external forces and environmental conditions. One of the main functions of steel rebars is to provide tensile strength to concrete, which is naturally weak in resisting tension. Concrete is known for its excellent compressive strength but tends to crack under tension. By embedding steel rebars within the concrete, these cracks are effectively controlled and prevented from expanding, ultimately improving the durability of the structure. Steel rebars also increase the flexural strength of concrete, allowing it to withstand bending and deformations more effectively. This is particularly important in structures such as beams, columns, and slabs that experience significant loads and forces throughout their lifespan. Furthermore, steel rebars act as reinforcement in concrete, enhancing its resistance to external factors like earthquakes, wind, and impact loads. The presence of rebars helps distribute and dissipate these forces throughout the structure, reducing the risk of structural failure and increasing overall durability. Another crucial aspect is the prevention of corrosion in reinforced concrete structures. Steel rebars are typically coated with materials that protect them from corrosion caused by moisture and chemical reactions. This protective coating, combined with the alkaline environment of concrete, forms a barrier that significantly slows down the corrosion process, ultimately increasing the longevity and durability of the concrete structure. To conclude, steel rebars play a vital role in enhancing the overall durability of concrete structures. They provide necessary tensile strength, improve flexural strength, enhance resistance to external forces, and prevent corrosion. Incorporating steel rebars makes concrete more robust, long-lasting, and capable of withstanding various challenges, ensuring the longevity and safety of the structure.
- Q: Are there any specific guidelines for storing steel rebars on-site?
- Yes, there are specific guidelines for storing steel rebars on-site. Here are some key guidelines to consider: 1. Rebars should be stored on a flat, level surface to prevent distortion or bending. If the ground is not level, use wooden pallets or metal racks to create a stable storage area. 2. Ensure that the storage area is clean and free from any debris that could damage the rebars. Avoid storing rebars directly on the ground or in areas prone to water accumulation. 3. Proper stacking is important to prevent rebars from toppling over. Stack rebars in an orderly manner, making sure to align them vertically and horizontally. Use spacers or separators to maintain adequate spacing between the rebars and prevent them from touching each other. 4. If rebars are stored outdoors, cover them with a waterproof tarp or plastic sheeting to protect them from rain, snow, and moisture. This will help prevent rust and corrosion. 5. If rebars are stored indoors, ensure that the storage area has proper ventilation to prevent moisture buildup. This is particularly important to prevent rusting in humid environments. 6. Rebars should be stored away from any potential sources of damage, such as heavy machinery, construction equipment, or areas with high traffic. This will minimize the risk of accidental damage during construction activities. 7. Regularly inspect the rebars for any signs of damage, rust, or corrosion. If any rebars are found to be damaged, they should be removed from storage and replaced to ensure structural integrity in the construction project. Following these guidelines will help ensure that steel rebars are stored safely and maintain their structural integrity for use in construction projects.
- Q: How are steel rebars used in bridge construction?
- Steel rebars are used in bridge construction to reinforce the concrete structures, providing strength and durability. They are placed within the concrete to withstand tension forces and prevent cracking or collapsing of the bridge.
- Q: What is the typical weight of a steel rebar?
- The weight of a steel rebar can vary depending on its diameter and length, resulting in different typical weights. However, in construction projects, the most commonly used steel rebar is usually 20 feet long and has a diameter ranging from 1/2 inch to 1 inch. In terms of weight, this standard size can range from approximately 7.5 pounds to 24 pounds per linear foot. Consequently, a 20-foot steel rebar can weigh anywhere between roughly 150 pounds to 480 pounds. It is worth noting that weight standards for steel rebars may differ between countries, so it is always recommended to refer to local specifications and standards for accurate information.
- Q: Do steel rebars increase the overall weight of a structure?
- Yes, steel rebars do increase the overall weight of a structure. Rebars are typically added to reinforce concrete structures, providing tensile strength to counteract the concrete's weakness in handling tension forces. Steel rebars are made of steel, which is a dense and heavy material. When incorporated into a structure, the weight of the rebars adds to the total weight of the construction. However, the additional weight is usually negligible compared to the overall weight of the structure, especially in large-scale projects. The benefits of using steel rebars in terms of structural integrity and durability far outweigh the minimal increase in weight they contribute.
- Q: Are there any alternatives to steel rebars in construction?
- Yes, there are alternatives to steel rebars in construction. Some common alternatives include fiberglass rebars, carbon fiber rebars, and basalt rebars. These alternatives offer advantages such as being lightweight, corrosion-resistant, and having high tensile strength. Additionally, materials like bamboo, timber, and certain polymers can also be used as alternatives to steel rebars in specific construction applications.
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High Quality Steel Deformed Bar HRB400 25/28/32mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 m.t
- Supply Capability:
- 10000 m.t/month
OKorder Service Pledge
OKorder Financial Service
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