Hot Rolled Reinforcing Deformed Steel Bars in Grade HRB400-HRB500
- 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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Specification
Standard:
GB
Technique:
Hot Rolled
Shape:
Round
Surface Treatment:
Black
Steel Grade:
HRB400
Thickness:
6-32mm
Length:
12m/pc
Net Weight:
2mt/bundle
OKorder is offering high quality Hot Rolled Rebars at great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to Africa, North American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
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.
Product Advantages:
OKorder's Hot Rolled Rebars are durable, strong, and resist corrosion.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Corrosion resistance
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
Manufacture: Hot rolled
Grade: HRB400 – HRB500
Certificates: ISO, SGS, BV, CIQ
Length: 6m – 12m, as per customer request
Packaging: Export packing, nude packing, bundled
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 each diameter as below for your information:
Diameter(mm) | Section area (mm²) | Mass(kg/m) | Weight of 12m bar(kg) |
6 | 28.27 | 0.222 | 2.664 |
8 | 50.27 | 0.395 | 4.74 |
10 | 78.54 | 0.617 | 7.404 |
12 | 113.1 | 0.888 | 10.656 |
14 | 153.9 | 1.21 | 14.52 |
16 | 201.1 | 1.58 | 18.96 |
18 | 254.5 | 2.00 | 24 |
20 | 314.2 | 2.47 | 29.64 |
22 | 380.1 | 2.98 | 35.76 |
25 | 490.9 | 3.85 | 46.2 |
28 | 615.8 | 4.83 | 57.96 |
32 | 804.2 | 6.31 | 75.72 |
36 | 1018 | 7.99 | 98.88 |
40 | 1257 | 9.87 | 118.44 |
50 | 1964 | 15.42 | 185.04 |
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered by OKorder.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 begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4: Can you offer the third part inspection certificates ?
A4: Yes, we can apply third part inspection before shipping, such as SGS, BV, etc .
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- 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 durability of concrete?
- Steel rebars play a crucial role in enhancing the durability of concrete structures. They are typically embedded within the concrete to provide reinforcement and improve the overall strength and longevity of the structure. Firstly, steel rebars enhance the tensile strength of the concrete. While concrete has excellent compressive strength, it is weak in tension. When exposed to external forces or loads, concrete tends to crack and fail under tension. However, the inclusion of steel rebars helps to distribute the applied load throughout the structure, effectively resisting cracking and preventing the propagation of cracks. This reinforcement allows the concrete to withstand greater tensile forces, thus enhancing its durability. Additionally, steel rebars help to control the shrinkage and cracking of concrete. During the curing process, concrete undergoes shrinkage due to the evaporation of water. This shrinkage can lead to the formation of cracks, which can compromise the integrity of the structure. By incorporating steel rebars, the concrete is reinforced and the shrinkage is restrained, minimizing the occurrence and propagation of cracks. This, in turn, ensures the durability of the concrete by maintaining its structural integrity. Moreover, steel rebars are highly resistant to corrosion. Concrete is generally alkaline, which creates a protective layer on the surface of the steel rebars, preventing them from rusting or corroding. This resistance to corrosion is vital in maintaining the durability of concrete structures, especially in environments where they are exposed to moisture, chemicals, or other corrosive agents. The presence of steel rebars ensures that the concrete remains structurally sound and prevents any potential weakening or deterioration due to corrosion. In conclusion, steel rebars significantly enhance the durability of concrete structures. They improve the tensile strength, control shrinkage and cracking, and provide resistance to corrosion. By reinforcing the concrete, steel rebars ensure that the structure can withstand external forces, maintain its structural integrity, and have a longer lifespan.
- Q: What are the different types of steel rebars used in airport construction?
- To ensure the durability and structural integrity of airport infrastructure, a variety of steel rebars are utilized in airport construction. Airport construction commonly employs the following types of steel rebars: 1. Mild Steel Rebars: These rebars, made from carbon steel with a smooth surface, are the fundamental and widely used reinforcement in airport construction. They provide general reinforcement and are applicable to airport runways, taxiways, and aprons. 2. High Strength Deformed (HSD) Steel Rebars: HSD rebars undergo a heat treatment process, enhancing their strength and ductility. These rebars have ribbed surfaces that adhere better to concrete, making them ideal for critical structural elements like beams, columns, and foundations in airport construction. 3. Epoxy-Coated Rebars: For environments prone to corrosion, epoxy-coated rebars are employed. These rebars have an epoxy resin coating that shields the steel from moisture and chemicals in concrete. Epoxy-coated rebars are frequently used in airport construction, particularly in areas exposed to corrosive substances and de-icing salts. 4. Stainless Steel Rebars: Stainless steel rebars possess excellent corrosion resistance and are commonly utilized in coastal airports or high-humidity regions. They are especially suitable for reinforcing concrete structures in airport terminals, hangars, and other areas where durability and aesthetics are crucial. 5. Galvanized Rebars: Galvanized rebars are coated with a layer of zinc to protect against corrosion. They are commonly used in areas with high moisture content or where concrete is exposed to harsh weather conditions. In airport construction, galvanized rebars reinforce structures such as retaining walls, drainage systems, and other external components. 6. Welded Wire Fabric (WWF): WWF consists of parallel and perpendicular steel wires welded to form a mesh-like structure. This rebar type is employed in airport construction for concrete slabs, pavements, and large surface areas. WWF ensures uniform reinforcement and even distribution of loads across the structure. It is essential to consider specific factors such as application, structural requirements, environmental conditions, and local building codes when selecting steel rebars for airport construction. Consulting with structural engineers and construction professionals is crucial to determine the most suitable type of steel rebar for each application in airport construction projects.
- Q: Can steel rebars be used in the construction of residential buildings?
- Steel rebars are indeed suitable for the construction of residential buildings due to their strength and durability. When it comes to reinforced concrete structures, steel rebars are commonly utilized. Within residential construction, their primary purpose is to reinforce concrete foundations, beams, columns, and slabs. This reinforcement provides added support and enhances the structural integrity of the building, allowing it to withstand various loads and forces. Steel rebars are preferred over alternative materials due to their high tensile strength, resistance to corrosion, and ability to withstand extreme weather conditions. Furthermore, they are readily available, cost-effective, and can be customized to meet specific building requirements. Consequently, steel rebars play a vital role in the construction of residential buildings, ensuring their long-lasting stability and safety.
- Q: What is the difference between carbon steel and stainless steel rebars?
- The main difference between carbon steel and stainless steel rebars lies in their composition and corrosion resistance. Carbon steel rebars are made primarily of iron and carbon, while stainless steel rebars contain iron, chromium, and other alloying elements like nickel and molybdenum. Carbon steel rebars are more susceptible to corrosion compared to stainless steel rebars, especially in environments with high moisture or exposure to chemicals. Stainless steel rebars, on the other hand, have a higher resistance to corrosion due to the presence of chromium, which forms a protective oxide layer on the surface. This makes stainless steel rebars suitable for applications in harsh or corrosive environments, such as marine structures or concrete exposed to chloride ions. Additionally, stainless steel rebars have higher tensile strength and ductility compared to carbon steel rebars. This makes them more suitable for structural applications where high strength and durability are required. Overall, the choice between carbon steel and stainless steel rebars depends on the specific application and the level of corrosion resistance and strength needed.
- Q: How are steel rebars transported to the construction site?
- Various methods are employed for the transportation of steel rebars, also known as reinforcing bars, to construction sites. One commonly used approach involves the use of trucks. The rebars are loaded onto flatbed trucks or trailers and firmly secured with straps or chains to prevent any shifting during transit. These trucks are specially designed to withstand the weight and length of the rebars, boasting robust frames and loading mechanisms. Another method is rail transportation. Steel rebars can be loaded onto rail cars, either on flatcars or in specialized containers, and transported to the construction site. This method proves particularly advantageous for long-distance transportation, as it offers a more cost-effective and efficient solution for large quantities of rebars. For construction projects situated near waterways, the transportation of rebars can also be accomplished by sea or barge. The rebars are loaded onto ships or barges and properly secured to prevent any damage or movement during transit. This method is commonly employed for projects necessitating substantial quantities of rebars or for construction sites located on islands or in coastal areas. Upon arrival at the construction site, cranes or forklifts are typically utilized to unload the steel rebars. These rebars are then either stored in designated areas or immediately employed for reinforcement in the construction process. It is of utmost importance to handle the transportation of rebars with caution, as this ensures their structural integrity and guards against potential accidents or damage during transit.
- Q: Can steel rebars be used in structures with limited construction expertise?
- Although limited construction expertise is sufficient for using steel rebars in structures, it is crucial to adhere to proper guidelines and possess a fundamental understanding of construction principles. Rebars are commonly employed to enhance the strength and durability of concrete structures. However, their accurate placement and installation play a pivotal role in guaranteeing the structural integrity of the building. While it is feasible to utilize steel rebars without extensive construction expertise, it is highly advisable to seek guidance from a professional engineer or a qualified construction expert. They can offer valuable insights regarding the suitable positioning, size, and spacing of rebars, as well as the necessary concrete mix design and curing techniques. Furthermore, it is essential to comply with local building codes and regulations, as they stipulate the minimum standards for structural safety. These codes frequently include specific requirements for the utilization of rebars in construction. By adhering to these guidelines and seeking professional advice, even individuals with limited construction expertise can effectively employ steel rebars and ensure the structural stability of their buildings.
- Q: What is the lifespan of a steel rebar in a concrete structure?
- The duration of a steel rebar's existence within a concrete structure may differ due to various factors. Generally, a well-designed and properly constructed concrete structure with steel reinforcement can endure for 50 to 100 years or even longer. One critical factor that affects its lifespan is the quality of the concrete and its ability to shield the steel reinforcement from external elements. Concrete acts as a barrier, safeguarding the steel rebar from moisture, oxygen, and other potentially corrosive substances. However, if the concrete is of inadequate quality, contains excessive amounts of chloride or other aggressive chemicals, or is not adequately cured, it can result in the deterioration of the rebar and significantly reduce its lifespan. Another significant aspect is the exposure conditions to which the concrete structure is exposed. If the structure is situated in a harsh environment with high levels of humidity, exposure to saltwater, or industrial pollutants, it can expedite the corrosion process and decrease the rebar's lifespan. Proper maintenance and periodic inspections can also have a substantial impact on prolonging the steel rebar's lifespan within a concrete structure. Regular inspections can help identify any initial signs of corrosion or deterioration, enabling timely repairs or implementation of protective measures. To enhance the lifespan of steel rebar, additional protective measures can be taken during construction, such as applying corrosion-resistant coatings or utilizing stainless steel reinforcement. These measures can significantly extend the rebar's lifespan and improve the overall durability of the concrete structure. In conclusion, the lifespan of a steel rebar in a concrete structure can vary but generally falls within the range of 50 to 100 years or more, assuming the concrete is of good quality, the exposure conditions are not excessively severe, and proper maintenance and protective measures are implemented.
- Q: What are the different types of steel rebars used in elevated highways?
- There are several types of steel rebars commonly used in elevated highways due to their strength and durability. These rebars are designed to provide structural support and reinforcement to the concrete structures in highways. 1. Mild Steel Rebars: Also known as black steel rebars, these are the most commonly used type of rebars in elevated highways. They are made from carbon steel and have a relatively low tensile strength. Mild steel rebars are cost-effective and provide adequate reinforcement for most highway structures. 2. High-strength Steel Rebars: These rebars are manufactured using high-strength low-alloy (HSLA) steels, which have higher tensile strength compared to mild steel rebars. They are used in areas of the highway that require additional strength and load-bearing capacity. High-strength steel rebars are especially beneficial in bridges and elevated structures where heavy traffic or seismic activity is expected. 3. Epoxy-coated Rebars: To enhance the corrosion resistance of the rebars, epoxy coating is applied to the surface of the steel. Epoxy-coated rebars are commonly used in areas with high exposure to moisture, such as coastal highways or regions with high humidity. The epoxy coating acts as a barrier between the steel and the external environment, preventing corrosion and extending the lifespan of the rebars. 4. Galvanized Rebars: Similar to epoxy-coated rebars, galvanized rebars are also corrosion-resistant. However, instead of an epoxy coating, they are coated with a layer of zinc. Galvanized rebars are known for their excellent resistance to corrosion caused by exposure to harsh chemicals or saline environments. They are commonly used in coastal areas or regions with high levels of pollution. 5. Stainless Steel Rebars: These rebars are made from stainless steel, which is a corrosion-resistant alloy containing chromium and nickel. Stainless steel rebars provide excellent resistance to corrosion, making them ideal for use in highly corrosive environments, such as highways near chemical plants or industrial areas. Although more expensive than other types of rebars, stainless steel rebars offer long-term durability and require minimal maintenance. It is important to consider the specific requirements and environmental conditions of the elevated highway project when selecting the appropriate type of steel rebars. Consulting with structural engineers and following local building codes and regulations is essential to ensure the safety and longevity of the highway structures.
- Q: What are the advantages of using ribbed steel rebars?
- There are several advantages to using ribbed steel rebars in construction projects. Firstly, the ribbed design of these rebars provides enhanced bonding with concrete. The ribs increase the surface area of contact between the rebar and the surrounding concrete, improving the adhesion and preventing slippage. This leads to a stronger bond, ensuring the structural integrity of the reinforced concrete. Secondly, ribbed steel rebars offer improved resistance to shear forces. The ribs act as anchor points within the concrete, distributing the load more evenly and reducing the chances of failure due to shear stress. This makes ribbed rebars ideal for applications that experience high shear forces, such as beams and columns. Additionally, the ribbed pattern of these rebars enhances their ductility. Ductility is the ability of a material to undergo deformation without breaking. The presence of ribs allows the steel rebar to stretch and bend without fracturing, making it more resistant to cracking or failure under stress. This is especially crucial in earthquake-prone areas, where the ability of a structure to absorb and dissipate energy is essential for its survival. Furthermore, ribbed steel rebars have excellent corrosion resistance. The ribs create a barrier that prevents moisture and corrosive agents from reaching the steel core. This significantly extends the lifespan of the rebar, reducing maintenance costs and ensuring the long-term durability of the reinforced concrete structure. Lastly, ribbed steel rebars are readily available and cost-effective. They are manufactured in various sizes and lengths, allowing for easy customization to suit different construction needs. Moreover, due to their popularity and widespread use, ribbed rebars are competitively priced, making them a cost-effective option for reinforcing concrete structures. In conclusion, the advantages of using ribbed steel rebars include improved bonding with concrete, enhanced resistance to shear forces, greater ductility, excellent corrosion resistance, and cost-effectiveness. These benefits make ribbed rebars an ideal choice for reinforcing concrete structures, providing strength, durability, and longevity to the construction projects.
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Hot Rolled Reinforcing Deformed Steel Bars in Grade HRB400-HRB500
- 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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