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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Specification
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 grade of reinforcement is used for cast-in-place floorslab?
- Now the more commonly used high-rise buildings are cast-in-place floorslab.The floor slab, of course, separates the floor and bears and transmits the floor load. At the same time, heat insulation, sound insulation, waterproof and so on.
- Q:Are steel rebars resistant to chemical attacks?
- Yes, steel rebars are generally resistant to chemical attacks. The high strength and durability of steel make it less susceptible to damage from various chemicals, including acids and alkalis. However, certain aggressive chemicals or environments may cause corrosion over time, which can be mitigated by applying protective coatings or using corrosion-resistant alloys.
- Q:How are steel rebars protected against rust or corrosion?
- Steel rebars are protected against rust or corrosion through a process called corrosion protection. There are various methods used to ensure the longevity and durability of steel rebars in construction projects. One of the most common methods is the application of protective coatings such as epoxy, zinc, or polyethylene. Epoxy coatings are frequently used as they provide a strong barrier against moisture and oxygen, preventing rust formation. These coatings are typically applied to the surface of the steel rebar through a process called fusion bonding, where the epoxy coating is melted onto the steel. Zinc coatings, on the other hand, are applied by either galvanizing or metallizing. Galvanizing involves immersing the steel rebar in molten zinc, forming a protective layer on the surface. Metallizing, on the other hand, involves spraying molten zinc onto the steel surface. Both methods create a protective zinc layer that acts as a sacrificial layer, preventing the steel rebar from corroding. Polyethylene coatings are another effective method of corrosion protection. These coatings are typically applied using a heat shrink process, where a polyethylene sleeve is wrapped around the steel rebar and heated to form a tight, protective layer. Polyethylene coatings provide excellent resistance against moisture and chemicals, ensuring long-term protection against rust and corrosion. In addition to these coating methods, stainless steel rebars can also be used to avoid corrosion. Stainless steel has inherent corrosion-resistant properties due to the presence of chromium, which forms a passive oxide layer on the surface. This oxide layer acts as a protective barrier against rust and corrosion, making stainless steel rebars highly durable and long-lasting. Overall, the protection of steel rebars against rust or corrosion is crucial to ensure the structural integrity and longevity of construction projects. By applying protective coatings such as epoxy, zinc, or polyethylene, or using stainless steel rebars, the risk of corrosion is significantly reduced, allowing the steel rebars to withstand the harsh environmental conditions and remain intact for many years.
- Q:How are steel rebars manufactured?
- Steel rebars are manufactured through a process called rolling, where steel billets are heated and passed through a series of rollers to shape them into the desired rebar sizes and profiles. This process ensures the rebars have the necessary strength and durability for construction purposes.
- Q:Can steel rebars be used in road construction?
- Yes, steel rebars can be used in road construction. Steel rebars are commonly used as reinforcement in concrete structures, including roads and highways, to enhance their strength and durability. They provide additional support to withstand heavy traffic loads and prevent cracking or deformation of the road surface.
- Q:What are the weight and density of steel rebars?
- Steel rebars, also known as reinforcing bars, are commonly utilized in construction to impart tensile strength to concrete structures. The weight and density of steel rebars may differ depending on their size and grade. The weight of a steel rebar is determined by its cross-sectional area and the specific weight of steel, which is roughly 7850 kilograms per cubic meter (or 0.2836 pounds per cubic inch). The cross-sectional area is usually quantified in square millimeters or square inches. For instance, a prevalent size of steel rebar is the #4 bar, possessing a diameter of 12.7 millimeters (or 0.5 inches) and a cross-sectional area of 127 square millimeters (or 0.197 square inches). By employing the specific weight of steel, we can compute the weight of a #4 rebar in the following way: Weight = Cross-sectional area x Specific weight of steel Weight = 127 mm^2 x 7850 kg/m^3 Weight = 998,950 grams or approximately 998.95 kilograms (or 2,201 pounds) Concerning density, the density of steel rebars coincides with the specific weight of steel, which is roughly 7850 kilograms per cubic meter. This density remains relatively consistent across diverse sizes and grades of steel rebars. It is important to acknowledge that the weight and density of steel rebars may slightly fluctuate based on the precise composition and manufacturing process. It is therefore prudent to refer to the manufacturer's specifications or consult engineering references for precise and up-to-date information.
- Q:Can steel rebars be used in corrosive environments?
- To ensure the longevity and structural integrity of steel rebars in corrosive environments, certain precautions must be taken. Corrosive environments, like those with high levels of moisture, saltwater, or chemical exposure, can accelerate the corrosion process of steel rebars and potentially cause structural damage. To mitigate this risk, there are various strategies that can be implemented. One common approach involves the use of corrosion-resistant reinforcing materials, such as stainless steel rebars or epoxy-coated rebars. These materials offer an additional layer of protection against corrosion and have proven to be effective even in highly corrosive environments. Another approach involves the utilization of corrosion inhibitors, which are chemicals that can be added to the concrete mix or directly applied to the steel surface. These inhibitors create a protective layer around the rebars, inhibiting corrosive agents from reaching the steel and slowing down the corrosion process. Furthermore, it is crucial to maintain an adequate thickness of concrete cover to protect the rebars from exposure to corrosive elements. Sufficient concrete cover acts as a barrier, preventing moisture and other corrosive agents from reaching the steel. Regular inspection and maintenance play a vital role in identifying early signs of corrosion. If corrosion is detected, appropriate measures should be taken to repair or replace the affected rebars, ensuring the structural integrity of the project. In conclusion, while steel rebars can be used in corrosive environments, it is essential to consider the specific conditions and employ the appropriate strategies to protect against corrosion. By using corrosion-resistant materials, applying inhibitors, maintaining proper concrete cover, and conducting regular inspections, the lifespan and performance of steel rebars in corrosive environments can be significantly enhanced.
- Q:How do steel rebars affect the overall seismic performance of a structure?
- Steel rebars play a crucial role in improving the overall seismic performance of a structure. By reinforcing concrete elements, such as beams, columns, and slabs, rebars enhance the structural integrity and ductility of the building. This means that during an earthquake, the rebars help the structure withstand the lateral forces and deformations, minimizing the risk of collapse. Additionally, the presence of rebars improves the energy dissipation capacity of the structure, allowing it to absorb and dissipate seismic energy, further enhancing its resilience.
- Q:What is the role of steel rebars in reducing concrete creep?
- Concrete creep, the gradual deformation of concrete over time under sustained loading, is significantly reduced by the incorporation of steel rebars. These high-strength reinforcement bars enhance the structural integrity and durability of concrete structures by providing tensile strength to counteract the forces that cause creep. Under sustained loads, concrete experiences internal stresses that can lead to creep. However, the presence of steel rebars helps distribute these stresses more evenly throughout the structure, acting as reinforcement to absorb and redistribute the tensile forces and minimize concrete deformation. Additionally, steel rebars improve the bond between concrete and reinforcement, ensuring they work together as a composite material. This bond prevents the formation of cracks, which can contribute to creep. Moreover, steel rebars enhance the overall stiffness and rigidity of concrete structures, resisting the deformation caused by creep and maintaining stability over time. In conclusion, steel rebars play a crucial role in reducing concrete creep by providing tensile strength, distributing internal stresses, improving the bond between concrete and reinforcement, and enhancing overall stiffness. Engineers can effectively mitigate the effects of creep and ensure long-term performance and durability by incorporating steel rebars into concrete structures.
- Q:Can steel rebars be used in the construction of data centers and IT facilities?
- Yes, steel rebars can be used in the construction of data centers and IT facilities. Steel rebars provide structural reinforcement and enhance the strength and durability of the building, making them suitable for supporting heavy equipment, racks, and servers. Additionally, steel rebars offer excellent fire resistance and can help ensure the safety and security of the data center or IT facility.
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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
OKorder Financial Service
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