Steel rebar Grade HRB400 for Construction
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
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Item specifice
Steel rebar is metal bars often used in construction for pouring concrete or supporting walls and columns. The rebar can
be smooth, though they are frequently manufactured with deformations that create greater texture to which concrete can
adhere, creating a stronger bond that helps prevent cracking of concrete. These deformations do not create weaknesses in
the rebar, and when rebar is measured to determine its diameter, it is typically measured at the narrowest point. Strength
grades indicate the amount of pressure the steel rebar can withstand, and grade and diameter are typically presented in both
imperial and metric units.
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.
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 | ||||||||||
Packing:
In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.
Our service
(1) We cooperate with famous factories with advanced equipment and well trained workers.
(2) We can provide factory price with trading company service.
(3) We continuously work on the improvement of our processes, guaranteeing consistently high standards
of quality to keep none compensation.
(4) We guarantee 24 hours response and 48 hours solution providing service.
(5) We accept small order quantity before formal cooperation.
(6) We deliver the agreed quality at the agreed time, reacting to changes in customer wishes in a flexible way.
(7) Due to our volume and selling power, we have excellent freight rates with shipping lines.
(8) We strive to always be fair and honest in our dealings with customers.
(9) We strive to work together with customers to achieve much more than we can achieve alone.
(10) Through our passion and commitment we aim to be a market leader in all our key markets. To maintain
our position as market leader we must continue to add value in all that we do.
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:Can steel rebars be used in bridge expansion joint construction?
- Yes, steel rebars can be used in bridge expansion joint construction. Steel rebars provide reinforcement and stability to the structure, making them suitable for use in bridge expansion joints where movement and stress can occur.
- Q:What is the effect of carbonation on steel rebars?
- The effect of carbonation on steel rebars is corrosion. Carbonation reduces the alkalinity of concrete, which leads to the breakdown of the passive layer on the steel surface. This allows moisture and oxygen to reach the steel, causing it to corrode and potentially weaken the structure over time.
- Q:What is the minimum concrete strength required for steel rebars?
- The minimum concrete strength required for steel rebars typically depends on the specific application and design requirements. However, it is common for construction projects to require a minimum concrete strength of 3,000 pounds per square inch (psi) for standard steel rebars.
- Q:What is the process of handling and transporting steel rebars on-site?
- The process of handling and transporting steel rebars on-site typically involves several steps. First, the rebars are delivered to the construction site either by truck or by train. Once at the site, the rebars are unloaded and organized in a designated area. To ensure easy access and prevent damage, rebars are often stacked in bundles or placed on steel racks. Next, rebars might need to be cut or bent to fit the required specifications for the construction project. This can be done using specialized equipment such as hydraulic shears or rebar benders. The rebars are then sorted based on size, length, and shape to facilitate their installation. During the construction process, rebars are lifted and moved using cranes, forklifts, or other lifting equipment. Safety measures, such as wearing personal protective equipment (PPE) and following proper lifting techniques, are essential to prevent accidents and injuries. Once the rebars are in their designated locations, they are tied together using wire or rebar tie guns to create the desired reinforcement structure. This ensures the rebars remain in place during concrete pouring and maintain the structural integrity of the construction project. Overall, the process of handling and transporting steel rebars on-site involves delivery, unloading, organization, cutting/bending, sorting, lifting, tying, and placing the rebars according to the project requirements and safety guidelines.
- Q:What are the different shapes of steel rebars?
- The different shapes of steel rebars include plain round bars, deformed bars, square bars, and rectangular bars.
- Q:Can steel rebars be used in corrosive environments?
- Steel rebars can be used in corrosive environments, but certain precautions need to be taken to ensure their longevity and structural integrity. Corrosive environments, such as those with high levels of moisture, saltwater, or chemical exposure, can accelerate the corrosion process of steel rebars, leading to potential structural damage. To mitigate this risk, various strategies can be employed. One common approach is to use corrosion-resistant reinforcing materials, such as stainless steel rebars or epoxy-coated rebars, which provide an additional layer of protection against corrosion. These materials have proven effective in resisting corrosion even in highly corrosive environments. Another approach is to utilize corrosion inhibitors, which are chemicals added to the concrete mix or applied directly to the steel surface. These inhibitors form a protective layer around the rebars, preventing corrosive agents from reaching the steel and slowing down the corrosion process. Additionally, proper concrete cover thickness should be maintained to ensure rebars are adequately protected from exposure to corrosive elements. Adequate concrete cover acts as a barrier, preventing moisture and other corrosive agents from reaching the steel. Regular inspection and maintenance are crucial to identify any signs of corrosion early on. If corrosion is detected, appropriate measures should be taken to repair or replace the affected rebars to maintain the structural integrity of the project. In summary, 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 fire resistance of concrete structures?
- Steel rebars can significantly enhance the fire resistance of concrete structures. The presence of steel rebars in concrete acts as reinforcement, providing added strength and stability to the structure. This reinforcement helps the concrete withstand the intense heat generated during a fire. The fire resistance of concrete structures is primarily due to the low thermal conductivity of concrete. When exposed to high temperatures, concrete undergoes a process called spalling, where the outer layer of the concrete breaks off due to the rapid expansion of water trapped within. However, the presence of steel rebars helps minimize spalling by holding the concrete together, preventing it from falling apart. Furthermore, steel rebars have a higher melting point compared to concrete. This means that even when exposed to extreme heat, the steel rebars retain their strength and integrity. As a result, the overall structural stability of the concrete structure is maintained, even under fire conditions. Steel rebars also act as a heat sink, absorbing and dissipating heat away from the surrounding concrete. This heat dissipation prevents localized hotspots from forming and spreading throughout the structure, minimizing the risk of structural failure. To improve the fire resistance of concrete structures further, special types of steel rebars, known as fire-resistant or fire-rated rebars, can be used. These rebars are specifically designed to withstand high temperatures for extended periods without losing their strength. They are often coated with materials such as epoxy or intumescent coatings that provide additional protection against fire. In conclusion, steel rebars play a crucial role in enhancing the fire resistance of concrete structures. Their presence improves the overall structural stability, minimizes spalling, dissipates heat, and provides added strength to withstand the intense heat generated during a fire.
- Q:How long do steel rebars typically last in a building?
- Steel rebars typically last for the lifetime of a building, which can be several decades or even centuries, depending on factors such as the quality of the rebar, the environment it is exposed to, and proper maintenance practices.
- Q:What are steel rebars made of?
- Steel rebars are made of carbon steel, which is an alloy of iron and carbon.
- Q:Can steel rebars be used in structures with high resistance to creep?
- Steel rebars are suitable for structures that require high resistance to creep. They are widely utilized in reinforced concrete structures, contributing to their strength and durability. Creep refers to the gradual deformation of a material when subjected to continuous stress over time. Although steel does experience some creep, its creep rate is relatively low compared to materials like concrete or timber. Moreover, incorporating rebars in reinforced concrete structures aids in load distribution and mitigates the impact of creep by enhancing rigidity and minimizing stress on the concrete. Consequently, steel rebars can be efficiently employed in structures that demand resistance to creep, provided that they are appropriately designed and installed.
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Steel rebar Grade HRB400 for Construction
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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