GB Standard HRB400, 500 Hot Rolled Deformed Steel Rebars
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 200000 m.t./month
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OKorder is offering GB Standard HRB400, 500 Hot Rolled Deformed Steel 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 African, South American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
GB Standard HRB400, 500 Hot Rolled Deformed Steel Rebars are ideal for structural applications and are widely used in the construction of buildings and bridges, and the manufacturing, petrochemical, and transportation industries.
Product Advantages:
OKorder's GB Standard HRB400, 500 Hot Rolled Deformed Steel Rebars are durable, strong, and wide variety of sizes.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
Manufacture: Hot rolled
Grade: HRB400 500etc
Certificates: ISO, SGS, BV, CIQ
Length: 6m – 12m, as per customer request
Packaging: Export packing, nude packing, bundled
Deformed Steel Bar | ||
Diameter (MM) | Cross Sectional Area (MM2) | Theorectical Weight (KG/M) |
6 | 28.27 | 0.222 |
8 | 50.27 | 0.395 |
10 | 78.54 | 0.617 |
12 | 113.1 | 0.888 |
14 | 153.9 | 1.21 |
16 | 201.1 | 1.58 |
18 | 254.5 | 2 |
20 | 314.2 | 2.47 |
22 | 380.1 | 2.98 |
25 | 490.9 | 3.85 |
28 | 615.8 | 4.83 |
32 | 804.2 | 6.31 |
36 | 1018 | 7.99 |
40 | 1257 | 9.87 |
HRB335
Grade | Technical data of the original chemical composition (%) | |||||||
C | Mn | Si | S | P | B | |||
HRB335 | ≤0.25 | ≤1.60 | ≤0.80 | ≤0.045 | ≤0.045 | >0.0008 | ||
Physics capability | ||||||||
Yield Strength(N/cm2) | Tensile Strength(N/cm2) | Elongation (%) | ||||||
≥335 | ≥490 | ≥16 | ||||||
HRB400
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 | ||
Physics capability | ||||||||
Yield Strength(N/cm2) | Tensile Strength(N/cm2) | Elongation (%) | ||||||
≥400 | ≥570 | ≥14 | ||||||
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: what is the difference between actual weight and theoretical weight?
A3: All the section steel has two weights: actual weight and theoretical weight. Actual weight is the weighing out when the product delivered from the mill. Theoretical weight is calculated by pieces. The invoice can be based on each of them as your request.
Images:
- Q: How do steel rebars improve the strength and durability of concrete?
- The strength and durability of concrete are greatly improved by steel rebars in several ways. Firstly, the inclusion of rebars reinforces the concrete structure, significantly increasing its tensile strength. While concrete is adept at resisting compression forces, it is weaker in tension. By embedding steel rebars within the concrete, the structure's ability to resist bending, cracking, and collapsing under heavy loads or external forces is greatly enhanced. Secondly, the presence of steel rebars prevents the occurrence of cracking and shrinkage in the concrete. As concrete dries and cures, it tends to shrink, leading to the formation of cracks. However, rebars help control and restrict this shrinkage by providing additional support and structural integrity. This effectively reduces the occurrence of cracks and ensures the long-term strength and durability of the concrete. Furthermore, the overall structural stability of the concrete is improved by steel rebars. When subjected to dynamic loads or seismic activity, concrete can undergo significant deformation or even fail. The inclusion of rebars helps distribute the load more evenly throughout the concrete structure, minimizing the risk of localized damage or collapse. This ultimately enhances the stability and safety of the concrete construction. Lastly, steel rebars contribute to the longevity and durability of concrete structures. The steel used in rebars is highly resistant to corrosion, which is a common issue in concrete exposed to harsh environmental conditions or moisture. By providing a protective layer called passivation, rebars prevent corrosion and maintain the structural integrity of the concrete over an extended period. This ensures that the concrete remains strong, durable, and resistant to degradation throughout its lifespan. In conclusion, steel rebars play a critical role in enhancing the strength and durability of concrete. They improve tensile strength, prevent cracking and shrinkage, enhance structural stability, and increase the lifespan of concrete structures. With the inclusion of steel rebars, concrete becomes a dependable and long-lasting construction material capable of withstanding various loads and environmental conditions.
- Q: How do steel rebars provide reinforcement to concrete?
- Steel rebars provide reinforcement to concrete by acting as tension members. When concrete is subjected to loads, such as the weight of a structure or external forces, it tends to crack and fail under tension. Steel rebars are embedded within the concrete to counteract this weakness. The rebars are made of high-strength steel, which has a much higher tensile strength than concrete. When the concrete is poured, the rebars are strategically placed throughout the structure, typically in areas where tension forces are expected to occur. This could include areas such as beams, columns, and slabs. As the concrete cures and hardens, it forms a strong bond with the steel rebars. When external forces are applied to the concrete, such as the weight of a building or lateral forces from wind or earthquakes, tension forces are generated within the concrete. However, instead of these forces causing the concrete to crack and fail, the rebars take on the majority of the tension. The high tensile strength of the steel rebars allows them to resist the tension forces, preventing cracks from forming and ensuring that the concrete remains intact and structurally sound. The rebars act as a reinforcement by distributing the tensile forces more evenly throughout the concrete, enhancing its overall strength and durability. Furthermore, rebars can also provide additional benefits to concrete structures. They can help minimize the effects of temperature changes, prevent shrinkage cracks, and improve the resistance to corrosion caused by exposure to environmental factors. Overall, the use of steel rebars in concrete construction significantly enhances the structural integrity and longevity of the concrete, ensuring its ability to withstand various loads and external forces over time.
- Q: What is the minimum cover required for steel rebars in concrete?
- The minimum cover required for steel rebars in concrete is typically specified by codes and standards, but it is generally recommended to have a minimum cover of 1.5 inches (38 mm) for rebars in normal conditions to ensure proper protection against corrosion and provide adequate fire resistance.
- Q: What are the guidelines for protecting steel rebars during concrete pouring?
- Some guidelines for protecting steel rebars during concrete pouring include ensuring proper placement and alignment of rebars, using plastic or epoxy-coated rebars to prevent corrosion, providing adequate concrete cover over the rebars, using protective caps on exposed ends, and avoiding over-vibration of the concrete to prevent rebars from shifting. Additionally, it is important to protect rebars from moisture and contamination during storage and construction, and to follow industry standards and specifications for reinforcement placement and protection.
- Q: How do steel rebars affect the shrinkage and creep of concrete?
- Steel rebars can have a significant impact on the shrinkage and creep behavior of concrete. Shrinkage refers to the reduction in volume of concrete due to the loss of moisture during the drying process, while creep refers to the time-dependent deformation of concrete under sustained load. The presence of steel rebars helps to mitigate the shrinkage of concrete. As the concrete shrinks, the rebars, being much stiffer than concrete, resist this shrinkage and provide a restraining effect. This restraint reduces the overall volume change of the concrete and helps to minimize cracking that may occur due to shrinkage. Additionally, the tensile strength of the steel rebars allows them to distribute stress and prevent localized cracking, further reducing the impact of shrinkage on the overall performance of the concrete. In terms of creep, the presence of steel rebars can increase the creep deformation of concrete. This is because the rebars can introduce additional stress and strain into the concrete, leading to greater creep deflections. However, the effect of steel rebars on creep is generally considered to be minor compared to other factors such as the mix design, water-cement ratio, and curing conditions. It is important to note that proper design and detailing of the reinforcement layout can help minimize the impact of steel rebars on shrinkage and creep. Adequate spacing and cover of rebars, as well as appropriate reinforcement ratios, can optimize the performance of both the concrete and the rebars. Additionally, the use of supplementary cementitious materials like fly ash or silica fume can also help reduce shrinkage and mitigate the impact of creep. In summary, steel rebars play a crucial role in minimizing the shrinkage-related issues in concrete by providing restraint and distributing stress. While they may increase the creep deformation of concrete, their impact is generally minor compared to other factors. Proper design and detailing of the reinforcement can optimize the performance of both concrete and steel rebars in terms of shrinkage and creep.
- Q: What is the role of steel rebars in maintaining structural integrity?
- Steel rebars play a crucial role in maintaining structural integrity by reinforcing and strengthening concrete structures. They provide tensile strength to resist cracking, bending, and shearing forces, enhancing the overall stability and durability of buildings, bridges, and other infrastructure.
- Q: When did the 1305 rebar contract become a major contract?
- 1305 rebar contract is now the main contract.
- Q: How do steel rebars perform in fire-resistant constructions?
- Steel rebars perform well in fire-resistant constructions due to their high melting point and thermal conductivity. They can withstand high temperatures for an extended period without significant deformation or loss of strength. This makes them suitable for reinforcing concrete structures in fire-prone areas, providing stability and structural integrity during a fire. Additionally, the thermal conductivity of steel helps to dissipate heat, reducing the risk of localized temperature increases that could compromise the overall fire resistance of the construction.
- Q: Can steel rebars be used in road construction projects?
- Indeed, road construction projects can utilize steel rebars. Steel rebars are frequently employed as reinforcement in concrete structures, such as roads, contributing to the overall sturdiness and endurance of the road by fortifying the concrete. Typically positioned within the concrete pavement, these rebars furnish tensile strength, effectively preventing cracks or fractures when subjected to heavy loads. Notably, steel rebars possess corrosion-resistant properties, a crucial attribute for road construction projects, given their exposure to moisture and inclement weather. Consequently, incorporating steel rebars into road construction ventures serves to enhance both the road's structural integrity and longevity.
- Q: What are the common sizes of steel rebars used in construction?
- The sizes of steel rebars used in construction can vary depending on the specific application and engineering requirements. However, there are several standard sizes that are widely used in the industry. The industry commonly utilizes rebar sizes ranging from #3 to #18. These numbers represent the diameter of the rebar in eighths of an inch. For instance, a #3 rebar has a diameter of 3/8 inch, while a #18 rebar has a diameter of 2 1/4 inches. Regarding metric measurements, the most frequently used rebar sizes range from 10mm to 40mm in diameter. These sizes are typically designated by their nominal diameter in millimeters, such as 10mm, 12mm, 16mm, 20mm, 25mm, 32mm, and 40mm. The selection of the appropriate rebar size depends on various factors, including the required load-bearing capacity, the structural design, and the type of construction project. Smaller diameter rebars, like #3 or 10mm, are typically utilized in lighter construction projects or for smaller concrete elements like walls or slabs. Conversely, larger diameter rebars, like #18 or 40mm, are commonly employed in heavy-duty applications such as bridges, high-rise buildings, or large-scale infrastructure projects. It is important to note that different countries or regions may have their own specific standards regarding rebar sizes. Consequently, it is crucial to consult local building codes and regulations to ensure compliance.
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GB Standard HRB400, 500 Hot Rolled Deformed Steel Rebars
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 200000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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