Deformed steel bar 6-40 MM HRB 400 HRB 500
- Ref Price:
-
- Loading Port:
- Qingdao
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 600 m.t.
- Supply Capability:
- 19452 m.t./month
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Specification
Standard:
AISI
Technique:
Hot Rolled
Shape:
Round
Surface Treatment:
Dry
Steel Grade:
HRB400,RHB335
Certification:
ISO
Thickness:
6-40mm
Length:
6-12m
Net Weight:
1-2.5MT
Rebar is common steel reinforcing bar, an important component of reinforced concrete and reinforced masonry structures.
It is usually formed from mild steel, and is given ridges for better frictional adhesion to the concrete.
To prevent such a failure, rebar is either deeply embedded into adjacent structural members, or bent and hooked at the ends
to lock it around the concrete and other rebars. This first approach increases the friction locking the bar into place while the
second makes use of the high compressive strength of concrete.
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.
Our Advantage:
High quality steel products from 1 class mills in China
Reasonable price
Professionalism of the products
On-time delivery
Complete documents and certificates
Sincere service to meet our clients' requirements
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.
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:Are thread steels of coarse steel?
- Thread steel does not belong to coarse steel, rough is shaped steel, fine is wire.
- Q:What is the effect of impurities on the corrosion resistance of steel rebars?
- Impurities can have a significant effect on the corrosion resistance of steel rebars. Steel rebars are primarily composed of iron and carbon, but impurities such as sulfur, phosphorus, and silicon can be present in varying amounts. Sulfur, for example, is a common impurity found in steel. It can react with water and oxygen to form sulfuric acid, which accelerates the corrosion process. This acid attack can cause the rebars to deteriorate faster, reducing their overall strength and durability. Phosphorus is another impurity that can negatively impact the corrosion resistance of steel rebars. It can promote the formation of localized corrosion sites, known as pitting, which can lead to the development of rust and eventual structural damage. Silicon, although generally considered a beneficial element in steel production, can also have an adverse effect when present in excessive amounts. Higher silicon levels in rebars can lead to the formation of a protective oxide layer, but this layer can sometimes be porous, allowing the penetration of corrosive agents and resulting in corrosion. Overall, the presence of impurities in steel rebars can compromise their corrosion resistance. It is crucial to ensure that the steel used in construction meets the specified standards and contains minimal impurities. Additionally, proper maintenance and regular inspection of rebars are essential to identify and address any potential corrosion issues before they lead to significant damage or structural failures.
- Q:How is steel rebar manufactured?
- The process of making steel rebar, also known as reinforcing bar, involves a series of steps to ensure its high quality and durability. To begin with, raw materials such as iron ore, coal, and limestone are carefully chosen and prepared. Iron ore is extracted from mines and processed to eliminate impurities. Coal is used as a fuel to heat the iron ore, while limestone acts as a flux to remove impurities during the heating process. Once the raw materials are ready, they are combined in a blast furnace. This furnace, a large cylindrical structure, subjects the iron ore, coal, and limestone to extreme temperatures. The intense heat triggers a chemical reaction that separates the iron from impurities, resulting in molten iron. The molten iron is then transferred to either a basic oxygen furnace (BOF) or an electric arc furnace (EAF). In the BOF process, the molten iron is mixed with scrap steel and other alloys to achieve the desired steel composition. Oxygen is blown into the furnace, removing impurities and adjusting the carbon content. In the EAF process, electricity is used to melt the scrap steel and other alloys, leading to chemical reactions that modify the composition and eliminate impurities. Once the steel is produced, it is poured into continuous casting machines, which shape it into long, rectangular strands called billets. These billets go through a series of rolling mills, gradually reducing their size and shaping them into the desired cross-sectional profile. The rolling process also enhances the strength and durability of the steel. After the rolling process, the rebar undergoes quenching and tempering. This involves rapidly cooling the rebar in water to increase its hardness, followed by reheating it to a specific temperature and then slowly cooling it. This process improves the rebar's strength and ductility, making it suitable for reinforcing concrete structures. Finally, the rebar is cut into the desired lengths and often undergoes surface treatment, such as galvanization or epoxy coating, to enhance its resistance to corrosion. It is then bundled and shipped to construction sites, where it is used to reinforce concrete structures like buildings, bridges, and roads. To summarize, the production of steel rebar involves the selection and preparation of raw materials, the melting and refining of iron in a blast furnace or electric arc furnace, the shaping of the steel into billets through continuous casting and rolling, the quenching and tempering process to improve its strength and ductility, and the final cutting and surface treatment before it is ready for use in construction projects.
- Q:How do steel rebars affect the structural integrity of a building?
- Steel rebars play a vital role in improving the structural integrity of buildings. These reinforced steel bars are mainly used in concrete structures to impart strength and stability. By reinforcing the concrete, rebars assist in withstanding tensile forces and preventing the formation of cracks in the building. Enhancing the overall load-bearing capacity of the structure is one of the primary ways rebars impact structural integrity. The combination of concrete and steel rebars creates a composite material capable of withstanding greater weight and stress. This is especially crucial in tall buildings or structures that need to support heavy loads like bridges or parking garages. Additionally, rebars help alleviate the effects of shrinkage and temperature fluctuations on the concrete. Concrete tends to shrink and expand due to changes in temperature and humidity, which can lead to crack formation and compromise the building's structural integrity. However, by embedding rebars within the concrete, these forces are counteracted, preventing significant damage. Another crucial aspect of rebars is their ability to resist bending and deformation. In the event of an earthquake or other dynamic forces, rebars aid in distributing the energy throughout the structure, reducing the risk of collapse. This resilience proves vital in regions prone to seismic activity. Furthermore, steel rebars offer exceptional durability and longevity. Unlike materials like wood or plastic, steel does not rot, decay, or attract termites or other pests. This ensures that the building's structural integrity remains intact over time, reducing the need for frequent repairs or replacements. In conclusion, steel rebars greatly enhance the structural integrity of buildings. By reinforcing concrete, rebars provide strength, increase load-bearing capacity, resist shrinkage and temperature changes, mitigate the effects of dynamic forces, and offer long-lasting durability. Without the inclusion of rebars, buildings would be more susceptible to cracking, structural failure, and compromised safety.
- Q:Are there any specific guidelines for handling and storing steel rebars?
- To ensure the quality and prevent any damage or accidents, specific guidelines exist for handling and storing steel rebars. Some of these guidelines include the following: 1. Use appropriate lifting equipment, such as cranes or forklifts, to handle the rebars and prevent strain or damage. Lift the rebars from the center to maintain balance and stability. 2. Before storing or using steel rebars, inspect them for defects like bends, cracks, or rust. Discard or repair any damaged or defective rebars before use. 3. Store steel rebars in a dry and well-ventilated area to prevent moisture accumulation and corrosion. Keep them off the ground on a flat surface, such as wooden pallets or racks, to avoid contact with soil or water. Take care when stacking rebars to prevent deformation or distortion. 4. Store different sizes and types of rebars separately to avoid mixing or confusion during use. Label or color-code the rebars for easy identification and retrieval. 5. Protect steel rebars from extreme temperatures, sunlight, and chemicals. Cover them with plastic sheets or tarpaulins to prevent moisture, dust, and debris from settling. 6. Securely tie or bundle steel rebars using appropriate strapping or wire during transportation. Avoid any impact or vibration that could cause damage. 7. Provide training on proper handling and storage techniques for steel rebars. Ensure personnel are aware of the hazards associated with improper handling and equipped with personal protective equipment (PPE) like gloves, safety boots, and helmets. By following these guidelines, you can ensure the quality and longevity of steel rebars, reduce the risk of accidents, and maintain a safe working environment.
- Q:Can steel rebars be used in structures with limited construction regulations?
- Yes, steel rebars can be used in structures with limited construction regulations. Steel rebars are commonly used in construction due to their high tensile strength and durability. However, it is important to note that even in structures with limited regulations, it is crucial to follow basic safety guidelines and ensure proper engineering and construction practices to ensure the structural integrity and safety of the building.
- Q:How are steel rebars used in elevator shafts?
- Steel rebars are used in elevator shafts to reinforce the concrete structures and provide strength and stability to the shaft walls. The rebars are typically placed vertically and horizontally within the concrete walls to enhance their load-bearing capacity and prevent any potential structural damage.
- Q:How do steel rebars affect the overall constructability of a project?
- The overall constructability of a project is greatly influenced by steel rebars. These rebars, also known as reinforcing bars, play a vital role in improving the strength, durability, and stability of concrete structures. They are essential in mitigating the tensile forces that concrete alone cannot bear, thereby increasing the overall load-bearing capacity of the structure. To begin with, steel rebars simplify the construction process by providing a framework for pouring and shaping concrete. They serve as a skeletal structure that holds the concrete in place during the curing process, ensuring proper setting and desired shaping. This contributes to the efficiency of construction projects, allowing for faster concrete placement and reducing the risk of structural deformities. Furthermore, rebars enhance the structural integrity of the project. By reinforcing the concrete, they enhance its ability to resist cracking, bending, and breaking under different loads and environmental conditions. This added strength and resilience make the structure more durable and reduce the need for frequent repairs or maintenance, ultimately saving time and costs in the long term. In addition to strength and durability, steel rebars also contribute to the constructability of a project by enabling flexibility in design. Architects and engineers have the freedom to create complex and innovative structures, such as high-rise buildings, bridges, and tunnels, that require high load-bearing capacities. The versatility of rebars allows for the construction of structures with unique shapes, curves, and spans, expanding the possibilities of architectural design. Moreover, steel rebars facilitate constructability by enabling the construction of large-scale projects. They allow for the creation of reinforced concrete elements, such as columns, beams, and slabs, capable of supporting heavy loads and distributing them evenly throughout the structure. This capability is particularly crucial for projects that require significant weight-bearing capacity, such as industrial buildings or infrastructure projects. In conclusion, steel rebars have a profound impact on the constructability of a project. They simplify the construction process, enhance structural integrity, enable flexibility in design, and facilitate the construction of large-scale projects. By incorporating rebars into concrete structures, construction professionals can ensure that their projects are stronger, more durable, and better equipped to withstand various loads and environmental conditions.
- Q:What are the different types of steel rebars used in industrial constructions?
- There are several different types of steel rebars that are commonly used in industrial constructions. These rebars are essential for reinforcing concrete structures and providing strength and durability to the overall construction. Some of the main types of steel rebars used in industrial constructions include: 1. Mild Steel Rebars: Also known as black steel rebars, these are the most commonly used type of rebars in construction. They are made from carbon steel and have a smooth surface. Mild steel rebars provide adequate strength and are cost-effective, making them suitable for a wide range of industrial applications. 2. High-strength Deformed Steel Rebars (HSD): These rebars have ribs or deformations on their surface to provide better bonding with concrete. HSD rebars are made from carbon steel and undergo a process called thermomechanical treatment to increase their strength. These rebars are commonly used in heavy-duty industrial constructions where higher strength is required. 3. Epoxy-coated Rebars: These rebars are coated with an epoxy resin to protect them from corrosion. Epoxy-coated rebars are commonly used in areas where the concrete is exposed to moisture or chemicals, such as bridges and marine structures. The epoxy coating acts as a barrier, preventing corrosion and extending the lifespan of the structure. 4. Galvanized Rebars: Galvanized rebars are coated with a layer of zinc to provide corrosion resistance. The zinc coating acts as a sacrificial layer, protecting the steel rebars from rusting. These rebars are commonly used in areas where the concrete is exposed to harsh environmental conditions or in coastal regions where the risk of corrosion is high. 5. Stainless Steel Rebars: Stainless steel rebars are highly corrosion-resistant and are used in environments that require exceptional durability and resistance to corrosion. They are commonly used in industrial constructions that are exposed to aggressive chemicals, high humidity, or extreme temperatures. Each type of steel rebar has its own set of advantages and is suitable for different applications based on the specific requirements of the industrial construction project. It is important to carefully consider factors such as strength, corrosion resistance, and cost when selecting the appropriate type of steel rebar for a particular construction project.
- Q:What is the role of steel rebars in minimizing the risk of progressive collapse?
- The risk of progressive collapse in structures can be significantly reduced by the use of steel rebars. Progressive collapse occurs when a primary structural element fails, causing adjacent elements to also fail and resulting in the collapse of the entire structure. In this context, steel rebars have a primary function of improving structural integrity and adding strength to load-bearing elements like columns, beams, and slabs. By reinforcing these elements with steel rebars, the structure becomes more resistant to sudden and catastrophic failures. Typically, steel rebars are embedded within the concrete, creating a composite structure known as reinforced concrete. These rebars serve as reinforcements against the concrete's weakness in tension. When subjected to loads, the rebars bear the tension forces while the concrete handles compression forces. This combination results in a more balanced distribution of the load and prevents localized failures. Steel rebars are especially important in preventing progressive collapse during unexpected failures or extreme events, such as explosions or impacts. They provide additional ductility and redundancy to the structure, ensuring that if one element fails, the load can be distributed to surrounding elements and preventing a domino effect of failure. Beyond preventing progressive collapse, steel rebars also contribute to the overall stability of a structure by increasing its load-carrying capacity. By reinforcing structural elements, they allow for larger spans and higher design loads, reducing the risk of overloading and potential failure. To maintain the effectiveness of steel rebars in minimizing the risk of progressive collapse, regular inspections and maintenance are necessary. These inspections involve checking for corrosion, ensuring proper placement, and providing adequate cover for the rebars to protect them from environmental factors that could compromise their integrity. In conclusion, the use of steel rebars is vital in minimizing the risk of progressive collapse. They reinforce critical load-bearing elements, enhance structural integrity, and provide redundancy. Steel rebars enable structures to withstand unexpected failures and extreme events, ensuring the safety and stability of buildings and infrastructure.
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Deformed steel bar 6-40 MM HRB 400 HRB 500
- Ref Price:
-
- Loading Port:
- Qingdao
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 600 m.t.
- Supply Capability:
- 19452 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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