Hot Rolled Deformed Bar HRB400 or BS449 B500B
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 200000 m.t./month
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Product Description:
OKorder is offering Product Description:
OKorder is offering Hot Rolled Deformed Bar HRB400 or BS449 B500B 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 European, 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 Deformed Bar HRB400 or BS449 B500B are durable, strong, and resist corrosion, exact size, regular package, chemical and mechanical properties are stable.
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: BS4449
Certificates: ISO, SGS, BV, CIQ
Diameter: 6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,
22mm,25mm,28mm,32mm,36mm,40mm,50mm
Length: 6M, 9M,12M or as required
Packaging: Export packing, nude packing, bundled
Chemical Composition: (Please kindly find our chemistry of our material based on HRB500 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 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: How do we guarantee the quality of our products?
A1: 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.
Q2: What makes stainless steel stainless?
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.
Q3: What makes stainless steel stainless?
A3: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.
- Q: How do steel rebars contribute to the fire resistance of concrete?
- Concrete's fire resistance is enhanced by steel rebars in several ways. Firstly, steel rebars possess a non-combustible nature and a high melting point, ensuring they do not burn or add fuel to fires. This characteristic aids in preventing the spread of fire and maintaining the concrete's structural stability during fire incidents. Additionally, steel rebars act as reinforcement within the concrete, boosting its overall strength and load-bearing capacity. This reinforcement effectively prevents cracking or fragmentation of the concrete under high temperatures caused by fire. The presence of steel rebars also enhances the concrete's ductility, enabling it to deform and absorb energy during fires, rather than abruptly shattering or collapsing. Moreover, steel's thermal conductivity surpasses that of concrete, enabling it to effectively conduct heat away from the fire zone. This assists in dissipating heat and preventing it from reaching critical levels that could compromise the concrete's structural integrity. By absorbing and distributing heat, steel rebars contribute to slowing down the temperature rise within the concrete during fires. In conclusion, steel rebars contribute to concrete's fire resistance by providing structural stability, improving strength and load-bearing capacity, enhancing ductility, and dissipating heat. These attributes make concrete structures reinforced with steel rebars more resilient, enabling them to withstand fires for extended periods. As a result, the safety of occupants is increased, and potential property damage is reduced.
- Q: Are steel rebars suitable for use in historical restoration projects?
- Depending on the specific requirements and circumstances, steel rebars may be appropriate for use in historical restoration projects. They possess high strength, durability, and the ability to effectively reinforce structures, making them a popular choice in modern construction and renovation endeavors. Nevertheless, it is crucial to consider the preservation and authenticity of the original structure when contemplating the utilization of steel rebars in historical restoration projects. Historical buildings often possess unique architectural features and materials that must be treated respectfully and preserved. In certain situations, the use of steel rebars may not be suitable, particularly if it compromises the historical integrity or visual appearance of the structure. This is particularly relevant for buildings with significant historical value or those protected by heritage regulations. If it is determined that steel rebars are necessary for structural reinforcement in a historical restoration project, it is vital to integrate them discreetly, minimizing their visual impact. This can be achieved by concealing them within the original materials or utilizing techniques that replicate the appearance of the original construction. In conclusion, while steel rebars offer structural advantages and durability, their use in historical restoration projects should be carefully evaluated to ensure they align with the preservation goals and requirements of the specific project. The preservation of historical authenticity should always be a priority in such endeavors.
- Q: What are the standards and specifications for steel rebars?
- International organizations such as ASTM and ISO primarily establish the standards and specifications for steel rebars, also known as reinforcing bars. These standards guarantee that steel rebars meet specific requirements for strength, durability, and dimensional accuracy. ASTM A615 is one of the most commonly used standards for steel rebars. It covers deformed and plain carbon-steel bars for concrete reinforcement. This standard sets the minimum yield strength, tensile strength, and elongation properties for various rebars grades, including Grade 40, Grade 60, and Grade 75. It also outlines the mechanical properties, chemical composition, and bending properties of rebars. Aside from ASTM A615, there are other standards that provide specifications for steel rebars. ASTM A706, for instance, focuses on low-alloy steel bars for concrete reinforcement. This standard ensures that rebars possess improved weldability and ductility to withstand seismic forces and other dynamic loads. ISO 15630 is another significant standard that addresses steel for concrete reinforcement. It provides specifications for hot-rolled and cold-worked steel bars, as well as welded fabric and lattice girders. ISO 15630 outlines the mechanical properties, chemical composition, and dimensional tolerances of rebars. Furthermore, regional or national organizations also establish their own standards for steel rebars. For instance, the BSI has developed the BS 4449 standard, which specifies the requirements for carbon steel rebars used in concrete reinforcement in the United Kingdom. Similarly, the ISI has set the IS 1786 standard for cold-twisted steel bars used in concrete reinforcement in India. In conclusion, the standards and specifications for steel rebars ensure that these construction materials possess the necessary strength, ductility, and other properties required for reinforcing concrete structures. By adhering to these standards, manufacturers, engineers, and construction professionals can ensure the safety and durability of reinforced concrete projects.
- Q: Are steel rebars suitable for use in structures with high wind loads?
- Yes, steel rebars are suitable for use in structures with high wind loads. Steel rebars provide strength and reinforcement to concrete structures, making them more resistant to high winds and ensuring the overall stability and durability of the structure.
- Q: How do steel rebars resist fire?
- Steel rebars resist fire due to their high melting point and low thermal conductivity. Steel has a melting point of around 1370°C, which is higher than typical temperatures reached in building fires. This allows rebars to maintain their structural integrity even in high-temperature environments. Additionally, steel has a low thermal conductivity, meaning it does not readily transfer heat, minimizing the risk of fire spread and structural failure. The combination of these properties makes steel rebars a reliable choice for reinforcing concrete structures in fire-prone areas.
- Q: Can steel rebars be bent or shaped?
- Yes, steel rebars can be bent or shaped using various methods such as heat, mechanical force, or cold bending techniques.
- Q: What is the fatigue strength of steel rebars?
- The maximum stress level that steel rebars can endure without failing or developing cracks is known as their fatigue strength. This strength can vary depending on factors like the steel grade, manufacturing process, surface condition, and the specific design and loading conditions. Compared to other construction materials, steel rebars generally have high fatigue strength. The fatigue behavior of steel rebars is influenced by their mechanical properties, including yield strength, tensile strength, and ductility. Rebars with higher strength tend to have higher fatigue strength. To determine the fatigue strength of steel rebars, they are subjected to cyclic loading at specific stress amplitudes and frequencies in fatigue testing. The number of cycles required for failure or crack initiation is recorded, and the fatigue strength is determined based on the stress level at a specific number of cycles. Considering the fatigue strength of steel rebars is crucial in structural design, particularly in applications with cyclic loading or dynamic forces, such as bridges, buildings, and offshore structures. Engineers and designers must carefully analyze the loading conditions and choose rebars with appropriate fatigue strength to ensure the integrity and durability of the construction.
- Q: What are the common quality tests performed on steel rebars?
- Steel rebars undergo several common quality tests to guarantee their strength and durability, ensuring they meet the necessary standards and can withstand the intended load and environmental conditions. The tensile test is one of the most prevalent quality tests for steel rebars. This test determines the maximum amount of tensile stress the rebar can bear before breaking, providing insights into its tensile strength and ductility. Another significant quality test is the bend test, which involves bending a rebar at a specific angle without it breaking. This test evaluates the rebar's flexibility, resistance to cracking or fracturing, and is particularly crucial for construction projects requiring bending or shaping. Chemical composition analysis is conducted to determine the percentage of various elements present in the steel rebars, such as carbon, manganese, phosphorus, sulfur, among others. This analysis ensures that the rebars meet specific requirements and do not contain any impurities that could jeopardize their strength or corrosion resistance. Corrosion resistance is also a vital property for steel rebars, especially in high-moisture or chemically exposed environments. A corrosion test is performed by subjecting the rebars to corrosive environments like salt spray or acidic solutions, assessing their resistance to corrosion. This test helps determine the rebars' suitability for specific applications and prevents premature degradation. Lastly, dimensional tests are conducted to verify that the rebars meet required dimensions and tolerances. These tests involve measuring the rebars' length, diameter, and weight. Deviations from specified dimensions can impact the rebars' structural integrity and compatibility with other construction materials. In summary, quality tests for steel rebars include tensile testing, bend testing, chemical composition analysis, corrosion resistance testing, and dimensional testing. These tests are crucial in ensuring the strength, durability, and suitability of steel rebars for various construction applications.
- Q: What is the process of galvanizing steel rebars?
- Galvanizing steel rebars is a process that involves applying a protective layer of zinc to the surface of the steel rebar to prevent corrosion and extend its lifespan. The process typically involves the following steps: 1. Surface Preparation: The steel rebars are thoroughly cleaned to remove any dirt, oil, or scale on the surface. This is typically done by using a combination of chemical cleaning agents and mechanical methods such as sandblasting or shot blasting. 2. Pickling: After cleaning, the rebars are immersed in a pickling solution, usually a mixture of hydrochloric acid and water. This solution removes any remaining impurities or oxides from the surface of the rebars. 3. Fluxing: The pickled rebars are then rinsed to remove any residual acid and are immersed in a flux solution. The flux solution helps to remove any remaining oxides and ensures proper adhesion of the zinc coating. 4. Galvanizing: The fluxed rebars are then dipped into a bath of molten zinc. The temperature of the zinc bath is typically maintained between 815 to 850 degrees Fahrenheit (435 to 455 degrees Celsius). The rebars are carefully immersed and then slowly withdrawn to allow excess zinc to drain off. 5. Quenching: After galvanizing, the rebars may be quenched in a specialized solution to cool them rapidly and stabilize the zinc coating. This step helps to prevent the formation of excessive zinc oxide on the surface. 6. Inspection: Once the galvanized rebars have cooled, they undergo a thorough inspection to ensure the quality of the coating. Visual inspection, thickness measurement, and adhesion tests are commonly conducted to assess the zinc coating's integrity. Overall, the galvanizing process provides a durable and effective protective coating for steel rebars, making them resistant to corrosion and extending their lifespan in various applications such as construction, reinforcement, and infrastructure projects.
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Hot Rolled Deformed Bar HRB400 or BS449 B500B
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 200000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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