Steel rebar with short delivery time and quality certificate
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 m.t.
- Supply Capability:
- 17497 m.t./month
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Quality Product, Order Online Tracking, Timely Delivery
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Specification
Standard:
AISI,GB
Technique:
Hot Rolled
Shape:
Round
Surface Treatment:
Dry
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400
Certification:
ISO
Thickness:
6-40mm
Length:
5.8-12M
Net Weight:
1-2 MT
Rebar is made of unfinished steel, making it susceptible to rusting. As rust takes up greater volume than the iron
or steel from which it was formed, it causes severe internal pressure on the surrounding concrete, leading to cracking,
spalling, and ultimately, structural failure. This is a particular problem where the concrete is exposed to salt water, as
in bridges built in areas where salt is applied to roadways in winter, or in marine applications. Epoxy-coated rebar or
stainless steel rebar may be employed in these situations at greater initial expense, but significantly lower expense
over the service life of the project. Fiber-reinforced polymer rebar is now also being used in high-corrosion environments
Most grades of steel used in rebar cannot accept welding; such as, to adjacent steel plates or as means to bind single
pieces of rebar together. However, special grades of rebar steel and welding rods make welding by expert welders possible.
To prevent workers from accidentally impaling themselves, the protruding ends of steel rebar are often bent over or covered
with special plastic "mushroom" caps.
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 | ||||||||||
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.
Packing:
In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.
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 elongation of steel rebars?
- The elongation of steel rebars pertains to how much they can deform or stretch before fracturing or breaking. It measures the ductility or flexibility of the steel rebars. Elongation is typically expressed as a percentage of the rebar's original length. The elongation of steel rebars varies based on the grade or type of steel used and the manufacturing processes involved. In general, steel rebars have a relatively high elongation compared to materials like concrete or timber. This makes them suitable for applications that require flexibility and resistance to deformation, such as reinforced concrete structures. Considering the elongation of steel rebars is crucial in structural design and construction. It affects the rebar's ability to withstand loads, particularly when subjected to tension or bending forces. Higher elongation values indicate a greater capacity for the rebar to stretch and deform without breaking, enhancing the overall performance and safety of the structure. To ensure the proper selection and utilization of steel rebars, it is essential to refer to the relevant standards and specifications provided by regulatory bodies and industry organizations. These guidelines outline specific requirements and recommendations for the elongation of steel rebars, along with other mechanical properties, to guarantee the structural integrity of construction projects.
- Q: What is the purpose of using steel rebars in concrete structures?
- The purpose of using steel rebars in concrete structures is to enhance the overall strength and durability of the structure. Concrete, while excellent in compression, is weak in tension. By incorporating steel rebars into the concrete, the structure is able to resist tensile forces and prevent cracking or failure. Steel rebars, which are typically made of carbon steel, are strong and have high tensile strength. They are placed within the concrete forms before pouring, creating a reinforced concrete structure. When subjected to tensile forces, the concrete transfers the load to the steel rebars, which can resist the pulling or stretching forces. This reinforcement helps to distribute the load more evenly, preventing localized stress points and reducing the risk of structural failure. In addition to providing tensile strength, steel rebars also help to control cracks in concrete structures. As concrete shrinks and expands due to temperature changes or drying, it is susceptible to cracking. The presence of steel rebars helps to limit the width and extent of these cracks, ensuring the structural integrity and longevity of the concrete. Furthermore, steel rebars can improve the resistance of concrete structures to seismic activity or other dynamic forces. The flexible nature of steel rebars allows them to absorb and dissipate energy during earthquakes or other vibrations, reducing the risk of collapse. Overall, the purpose of using steel rebars in concrete structures is to reinforce and strengthen the concrete, providing additional tensile strength, controlling cracks, and enhancing the overall durability and resilience of the structure.
- Q: How is steel made for rebar production?
- Steel for rebar production is made through a process called the basic oxygen furnace (BOF) method. In this method, iron ore, limestone, and coke are heated in a blast furnace to produce molten iron. The molten iron is then purified and refined in a converter, where oxygen is blown into the molten iron to remove impurities. Alloying elements are added to achieve the desired steel composition. Finally, the molten steel is cast into billets or blooms, which are then rolled into rebar shapes.
- Q: How are steel rebars connected or joined together during construction?
- During construction, there are several methods and techniques for connecting steel rebars. One common method is to overlap the rebars and tie them together with steel wire, a process known as rebar tying or wire tying. To ensure a strong and secure connection, the rebars are overlapped at a length typically 40 to 60 times the diameter of the rebars. This overlapping length allows for load transfer and structural integrity. Once properly overlapped, steel wire is tightly wrapped around the intersection point to hold the rebars together. Another method is to use mechanical couplers, which are pre-fabricated devices that join two rebars together. These couplers provide a threaded connection, allowing for a more precise and efficient joining process. The rebars are inserted into the couplers and tightened using a wrench or appropriate tool. In larger construction projects, welding is also used to connect rebars. This involves melting the rebars at the intersection point and fusing them together with heat and pressure. Welding provides a strong and permanent connection but requires skilled labor and safety precautions. In some cases, rebars can be connected using epoxy bonding. This involves applying adhesive to the rebars' surface and pressing them together. The epoxy acts as a bonding agent, creating a durable connection. The method of connecting rebars depends on factors like rebars' size, project requirements, and construction techniques. It's important to follow industry standards and guidelines to ensure proper connection and integrity, as rebars play a critical role in reinforcing concrete structures.
- Q: How do steel rebars contribute to the energy efficiency of a building?
- There are several ways in which steel rebars contribute to the energy efficiency of a building. To begin with, they are used to reinforce concrete structures like beams, columns, and walls. This reinforcement enhances the building's structural integrity, enabling it to withstand different loads and forces. Consequently, the construction process requires fewer materials, resulting in a more energy-efficient building. Moreover, steel rebars possess exceptional thermal conductivity properties. This means they can effectively transfer and distribute heat throughout the building, aiding in regulating the internal temperature. By evenly dispersing heat, steel rebars help to minimize temperature fluctuations, thereby reducing the need for excessive heating or cooling systems and conserving energy. Furthermore, steel rebars have a lengthy lifespan and necessitate minimal upkeep. This durability ensures that the building remains structurally sound over time, decreasing the frequency of repairs or replacements. As a result, the energy consumed in maintenance and renovation activities is significantly reduced. Additionally, the use of steel rebars enables the construction of larger, open spaces with fewer supporting columns. This design flexibility allows for the incorporation of natural light and ventilation, reducing dependence on artificial lighting and air conditioning systems. By maximizing the utilization of natural resources, steel rebars contribute to the energy efficiency of the building. In conclusion, steel rebars play a crucial role in improving the energy efficiency of a building. Their ability to reinforce structures, efficient thermal conductivity, durability, and design flexibility all contribute to decreasing the energy consumption associated with the construction, maintenance, and operation of the building.
- Q: What are the guidelines for proper placement of steel rebars in concrete structures?
- The proper placement of steel rebars in concrete structures is essential to ensure the structural integrity and durability of the construction. Here are some guidelines to follow for the correct placement of rebars: 1. Design Considerations: The first step is to refer to the structural drawings and specifications provided by the engineer. These documents will outline the required rebar sizes, spacing, and any specific details or arrangements needed for the project. 2. Rebar Size and Spacing: The size and spacing of rebars are determined based on the structural requirements and load-bearing capacity of the concrete structure. The diameter and spacing of the rebars should adhere to the design specifications to provide adequate reinforcement. 3. Concrete Cover: The concrete cover refers to the distance between the outer surface of the rebar and the edge of the concrete. This cover protects the rebars from corrosion and provides fire resistance. It is crucial to maintain the specified concrete cover to ensure the longevity of the rebars. 4. Lap Length: In cases where rebars need to be spliced or joined together, a lap length is specified. The lap length ensures sufficient overlap for the transfer of stress between the rebars and prevents any weak points in the structure. 5. Alignment and Positioning: Rebars should be properly aligned and positioned within the concrete formwork. They should be placed in the center of the concrete section to effectively resist tension and compression forces. The use of spacers or chairs can help maintain the desired rebar position during the pouring and setting of the concrete. 6. Clearances and Edge Distance: Adequate clearances must be maintained between rebars to allow for proper concrete flow during casting. Similarly, minimum edge distances should be maintained to prevent rebar corrosion and ensure proper concrete cover. 7. Tying and Fixing: Rebars should be securely tied and fixed at intersections to prevent displacement during concrete placement. Properly tying the rebars using wire or approved connectors helps maintain their position and ensures the structural integrity of the concrete. 8. Inspection and Quality Control: Regular inspections should be conducted during the concrete pouring process to verify that the rebars are placed correctly and according to the design specifications. Any deviations or discrepancies should be addressed promptly to avoid compromising the structural integrity of the concrete structure. By following these guidelines, construction professionals can ensure the proper placement of steel rebars in concrete structures, resulting in safe and durable constructions that can withstand the design loads and provide long-term structural stability.
- Q: Can steel rebars be used in bridge construction projects?
- Yes, steel rebars can be used in bridge construction projects. Steel rebars are commonly used as reinforcement in concrete structures, including bridges. They provide strength and stability to the bridge, enhancing its load-bearing capacity and resistance to various forces such as tension, compression, and bending. Steel rebars are highly durable and can withstand harsh environmental conditions, making them an ideal choice for bridge construction where longevity and structural integrity are crucial. Additionally, steel rebars can be easily shaped and bent to suit the specific design requirements of the bridge, allowing for flexible and efficient construction. Overall, steel rebars are widely accepted and commonly used in bridge construction projects due to their excellent mechanical properties and reliability.
- Q: What are the advantages of using ribbed steel rebars?
- Using ribbed steel rebars in construction projects offers several advantages. To begin with, the ribbed design of these rebars enhances the bonding with concrete. The presence of ribs increases the contact surface area between the rebar and the surrounding concrete, resulting in improved adhesion and prevention of slippage. This ultimately leads to a stronger bond, ensuring the structural integrity of the reinforced concrete. Secondly, ribbed steel rebars provide enhanced resistance against shear forces. The ribs act as anchor points within the concrete, evenly distributing the load and reducing the risk of failure due to shear stress. This makes ribbed rebars particularly suitable for applications that experience high shear forces, such as beams and columns. Additionally, the ribbed pattern of these rebars improves their ductility. Ductility refers to a material's ability 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 particularly crucial in earthquake-prone areas, where a structure's ability to absorb and dissipate energy is vital for its survival. Furthermore, ribbed steel rebars demonstrate excellent corrosion resistance. The ribs act as a barrier, effectively preventing moisture and corrosive agents from reaching the steel core. This significantly prolongs 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 come in various sizes and lengths, allowing for easy customization to meet different construction needs. Additionally, 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 use of ribbed steel rebars offers multiple benefits, including enhanced bonding with concrete, improved resistance to shear forces, greater ductility, excellent corrosion resistance, and cost-effectiveness. These advantages make ribbed rebars an ideal choice for reinforcing concrete structures, guaranteeing strength, durability, and longevity in construction projects.
- Q: What is the difference between the material of steel thread and its use?
- There are two kinds of thread classification methods:First, the geometric shapes are classified and classified according to the cross sectional shape of the ribs and the pitch of the ribs. For example, the British Standard (BS4449), the steel is classified into type I and type ii.Two is in the performance classification (grade), for example our country standard (G B1499), according to the strength level (yield / tensile strength) will be divided into 3 grades of thread steel;
- Q: How do steel rebars affect the overall load-bearing capacity of a structure?
- The load-bearing capacity of a structure is greatly enhanced by steel rebars. These reinforcing bars are commonly added to concrete structures, such as beams, columns, and slabs, to add strength and durability. The main purpose of rebars is to resist tensile forces, which concrete alone cannot effectively handle. By embedding steel rebars in the concrete, the structure's overall load-bearing capacity significantly increases. When the structure is subjected to a load, the rebars evenly distribute the forces, preventing cracks and reducing the risk of structural failure. This reinforcement improves the structure's ability to withstand heavy loads, including the weight of the building, furniture, occupants, and external forces like wind and earthquakes. Additionally, rebars help control and limit the spread of cracks within the concrete. Concrete is strong in compression but weak in tension, so without rebars, it would easily crack under tensile stress. The rebars act as a reinforcement, absorbing some of the tensile forces and preventing the cracks from expanding, thus maintaining the overall strength of the structure. Furthermore, steel rebars enhance the ductility of the structure. Ductility refers to a material's ability to deform without breaking. When a structure experiences excessive loads or external factors cause deformation, the rebars absorb and dissipate the energy, allowing the structure to deform in a controlled manner instead of collapsing suddenly. To sum up, steel rebars significantly improve the load-bearing capacity of a structure by providing tensile strength, preventing crack propagation, and enhancing ductility. By reinforcing the concrete, rebars ensure that the structure can withstand heavy loads, increasing its strength, durability, and overall safety.
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Steel rebar with short delivery time and quality certificate
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 m.t.
- Supply Capability:
- 17497 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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