A615 deformed steel bar for construction

A615 deformed steel bar for construction System 1

A615 deformed steel bar for construction

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

Specifications of HRB500 Deformed Steel Bar:

Standard	GB	HRB500
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Payment term	TT or L/C
Application	mainly used in construction industry to reinforce concrete structures and so on
Quality	First quality, the goods are from Chinese big manufacturers.
Type	Hot rolled deformed steel bar
Brand name	DRAGON

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
HRB500	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045		0.08-0.12
	Physical capability
	Yield Strength (N/cm²)		Tensile Strength (N/cm²)			Elongation (%)
	≥500		≥630			≥12

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

Usage and Applications of HRB500 Deformed Steel Bar:

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..

Packaging & Delivery of HRB500 Deformed Steel Bar:

Packaging Detail: products are packed in bundle and then shipped by container or bulk vessel, deformed bar is usually naked strapping delivery, when storing, please pay attention to moisture proof. The performance of rust will produce adverse effect.

Each bundle weight: 2-3MT, or as required

Delivery Detail: within 45 days after received advanced payment or LC.

Label: to be specified by customer, generally, each bundle has 1-2 labels

Trade terms: FOB, CFR, CIF

Deformed Steel Bar in stock

A615 deformed steel bar for construction

Deformed Steel Bar in testing

Note:

1. Our products are produced according to national standard (GB), if not, supply according to national standards (GB) or agreement as customer required.

2. Other Grade and Standard Deformed Steel Bar we can supply:

Grade: GR40/GR60, G460B/B500A/B500B/B500C,BST500S

Standard: ASTM, BS, DIN

The Minimum Order Quantity of these products is high, and need to be confirmed.

3. We can not only supply Deformed Steel Bar; if you need anything about building materials, please contact us for further information.

4. Please send us your detail specifications when inquire. We will reply to you as soon as possible. We sincerely hope we can establish a long stable business relationship.

Q:What are the precautions to be taken while welding steel rebars?: To ensure safe and effective welding of steel rebars, there are several precautions that should be taken: 1. It is important to work in a well-ventilated area or use exhaust systems to remove harmful fumes and gases generated during welding. This helps maintain a safe breathing environment. 2. Welders should always wear appropriate personal protective equipment (PPE) such as a welding helmet or face shield, safety glasses, welding gloves, flame-resistant clothing, and steel-toed boots. This protective gear minimizes the risk of burns, eye injuries, and other physical hazards. 3. Fire prevention is crucial. Before starting the welding process, ensure that the work area is free of flammable materials and have a fire extinguisher nearby. It is also advisable to have a fire watch person present to monitor for potential fire hazards. 4. Proper grounding is essential to prevent electrical shocks. Ensure that the welding machine is correctly grounded and the workpiece is connected to a reliable grounding point. 5. Clean the surface of the rebars before welding. Remove any oils, grease, dirt, or rust using a wire brush or grinder, as these contaminants can affect the weld's quality. 6. Employing the correct welding technique is crucial for strong and reliable welds. Follow recommended welding parameters, such as current, voltage, and electrode diameter, and maintain a steady hand and consistent travel speed to prevent weld defects. 7. It is important to have proper training and experience when working with steel rebars. Ensure the welder is skilled and knowledgeable in this area to minimize errors and meet required standards and specifications. By adhering to these precautions, welders can significantly reduce the risk of accidents, injuries, and subpar weld quality when working with steel rebars.

Q:How are steel rebars protected against chemical attacks?: Corrosion protection is a process that shields steel rebars from chemical attacks. Various techniques and materials are utilized to prevent corrosive substances from harming the rebar. One method commonly employed is the application of protective coatings. These coatings, such as epoxy or zinc, create a barrier on the rebar's surface, obstructing corrosive substances from reaching the steel. Moreover, these coatings offer added protection against moisture and other environmental factors that contribute to corrosion. Corrosion inhibitors are another means of safeguarding the rebars. These chemicals can be added to the concrete mix or directly applied to the rebar. By forming a protective layer on the steel's surface, corrosion inhibitors impede the corrosion process. These inhibitors can be organic or inorganic compounds, targeting specific corrosion mechanisms. In certain cases, stainless steel rebars are used to protect against chemical attacks. Stainless steel possesses greater resistance to corrosion in comparison to regular steel rebars. The presence of chromium creates a passive layer on the steel's surface, guarding it against chemical reactions. Stainless steel rebars are frequently utilized in highly corrosive environments, such as marine structures or wastewater treatment plants. Regular maintenance and inspection play a crucial role in safeguarding steel rebars against chemical attacks. Any signs of damage or corrosion should be promptly addressed. Regular cleaning and removal of corrosive substances that accumulate on the rebars also aid in preventing chemical attacks. In conclusion, a combination of protective coatings, corrosion inhibitors, stainless steel rebars, and regular maintenance is essential for protecting steel rebars against chemical attacks. These measures prolong the rebars' lifespan and uphold the structural integrity of concrete structures.

Q:What are the challenges associated with the installation of steel rebars?: There are several challenges associated with the installation of steel rebars. Firstly, the weight of the rebars can be a significant challenge. Steel rebars are heavy and can require heavy machinery or manual labor to lift and maneuver them into place. This can pose a risk to the safety of workers and may require additional time and resources to ensure proper installation. Secondly, the placement of rebars can be challenging, especially in complex or intricate structures. The rebars need to be accurately positioned according to the design and structural requirements, which can be difficult in areas with limited accessibility or in congested reinforcement zones. This requires skilled labor and careful coordination with other trades involved in the construction process. Another challenge is the corrosion protection of rebars. Steel rebars are susceptible to corrosion when exposed to moisture and chemicals in the environment. Therefore, proper measures need to be taken to ensure adequate corrosion protection, such as using protective coatings or ensuring proper concrete cover, which adds complexity to the installation process. Additionally, the coordination between different construction teams is crucial when installing rebars. The rebars need to be properly integrated with other structural elements, such as columns, beams, and walls. This requires effective communication and collaboration between the design team, steel fabricators, and construction teams to ensure seamless integration and avoid any conflicts or delays. Furthermore, the installation of rebars often involves working at heights or in confined spaces, which presents additional challenges in terms of safety and accessibility. Adequate safety measures, such as scaffolding, harnesses, and proper training for workers, are necessary to mitigate the risks associated with working at these conditions. Lastly, the cost of steel rebars can be a challenge, especially when working with tight budget constraints. Steel rebars are a significant component of the construction process, and their cost can fluctuate due to market conditions or availability. This makes it crucial for project managers to carefully plan and budget for the installation of rebars to avoid unexpected cost overruns. In conclusion, the installation of steel rebars comes with various challenges, including the weight of the rebars, accurate placement, corrosion protection, coordination with other trades, working at heights or in confined spaces, and cost considerations. Addressing these challenges requires skilled labor, proper planning, effective communication, and adherence to safety protocols.

Q:Can steel rebars be used in structures with high noise reduction requirements?: When structures require high noise reduction, steel rebars may not be the most effective solution by themselves, although they can still be utilized. Steel rebars possess sound-dampening properties due to their common usage in construction. However, their primary purpose is to strengthen and reinforce structures, rather than minimize noise transmission. To achieve significant noise reduction in structures, additional measures must be taken, such as incorporating acoustic insulation materials or employing specific design techniques. These techniques may involve the utilization of double walls, sound-absorbing panels, resilient mounts, and other specialized acoustic treatments. Although steel rebars alone do not offer substantial noise reduction, they can still contribute to overall noise reduction endeavors when combined with other soundproofing techniques. It is advisable to consult acoustic experts or engineers to determine the most suitable combination of materials and design strategies to fulfill a structure's specific noise reduction requirements.

Q:How do steel rebars affect the overall creep and shrinkage of concrete structures?: The overall deformation of concrete structures can be significantly affected by steel rebars. Creep, which refers to the long-term deformation of concrete under sustained load, and shrinkage, the reduction in volume during drying and hardening, are both influenced by rebars. To control and mitigate both creep and shrinkage, steel rebars play a crucial role. When embedded in concrete, rebars enhance the load-carrying capacity and provide tensile strength to the structure. This reinforcement allows for stress distribution and limits deformation over time. In terms of creep, steel rebars minimize its effects by reducing stress transferred to the concrete. By absorbing a significant portion of the load applied, rebars alleviate strain and reduce creep deformation. Furthermore, rebars help control cracking caused by creep, thus preserving the concrete's structural integrity. Regarding shrinkage, steel rebars also impact its magnitude. As concrete shrinks during drying and hardening, rebars act as restraints, preventing excessive volume reduction. By resisting contraction forces, rebars minimize the potential for cracking and maintain the concrete's structural stability. It is important to consider the type, size, and spacing of rebars as they can affect the overall impact on creep and shrinkage. Proper design and placement, including appropriate cover thickness, are necessary to ensure optimal performance and minimize long-term deformations. In conclusion, steel rebars play a vital role in controlling creep and shrinkage in concrete structures. By providing reinforcement, distributing stress, and preventing cracking, rebars maintain the structural integrity of concrete over time.

Q:Are there any special requirements for handling and storing steel rebars on construction sites?: Yes, there are special requirements for handling and storing steel rebars on construction sites. It is important to ensure that rebars are stored in a designated area that is clean, dry, and protected from moisture, dirt, and other contaminants. They should be stored in a horizontal position and stacked in a way that prevents damage or deformation. Additionally, rebars should be handled with care to avoid any bending, twisting, or dropping, as these can compromise their structural integrity. It is crucial to follow safety guidelines and use appropriate lifting and handling equipment to prevent accidents or injuries during the transportation and installation of rebars.

Q:What is the role of steel rebars in preventing concrete spalling due to fire?: The role of steel rebars in preventing concrete spalling due to fire is crucial. Spalling is the process where concrete cracks, breaks, or flakes off under extreme heat, such as in a fire. Steel rebars, also known as reinforcement bars, are embedded within the concrete structure to enhance its strength and durability. During a fire, the temperature can rise rapidly, causing the moisture within the concrete to turn into steam. This steam generates pressure within the concrete, leading to spalling. However, the presence of steel rebars helps to mitigate this issue. Steel has a higher melting point than concrete and possesses excellent thermal conductivity. When exposed to high temperatures, the steel rebars conduct and dissipate the heat more efficiently compared to the surrounding concrete. This heat transfer helps to minimize the temperature gradient within the concrete, reducing the risk of spalling. Furthermore, steel rebars act as a reinforcement to hold the concrete together. In the event of spalling, the rebars help to maintain the structural integrity of the concrete by preventing it from completely disintegrating. They provide additional strength and support to the concrete, making it more resistant to cracking and breaking. In summary, steel rebars play a vital role in preventing concrete spalling due to fire. They dissipate heat, minimize temperature gradients, and provide structural support to the concrete. By enhancing the fire resistance of the concrete, steel rebars contribute to the overall safety and longevity of the structure.

Q:What's the difference between primary and two grade steel and three grade steel?: The two is the performance of classification (class), for example, China's current implementation of standards, (G B1499.2-2007) for steel wire for 1499.1-2008), according to the strength (tensile strength yield point / steel) will be divided into 3 levels; the Japanese industrial standard (JI SG3112), according to the comprehensive performance of the steel branch for the 5 species; the British Standard (BS4461), also provides some level of performance test of thread steel. In addition, the thread steel can be classified according to the use, such as reinforced concrete, ordinary steel bars and reinforced concrete bars for heat treatment.

Q:How are steel rebars identified based on their grades?: Steel rebars are identified based on their grades through a specific marking system. The grade of a steel rebar indicates its tensile strength and other mechanical properties. This identification is crucial for construction purposes as it ensures the proper use of rebars based on their strength requirements. The marking system used for identifying steel rebars typically involves a series of numbers, letters, or symbols. The most common method is to mark the rebar with a series of numbers that represent the minimum yield strength of the steel. For example, a rebar with a grade of 40 will have "40" stamped on it, indicating a minimum yield strength of 40,000 pounds per square inch (psi). In addition to the numerical marking, some rebars may also have letters or symbols to provide more detailed information about their characteristics. These additional markings can include the type of steel used, such as "A" for mild steel or "W" for weldable steel. Other symbols may indicate the rebar's country of origin or specific manufacturer information. It is important to note that different countries and regions may have their own specific marking systems and standards for identifying steel rebars. Therefore, it is essential to consult the local building codes or regulations to understand the specific grading system used in a particular area. Overall, the grade markings on steel rebars provide crucial information about their strength and mechanical properties, enabling engineers, contractors, and construction workers to select and use the appropriate rebars for different structural applications.

Q:What is the effect of improper storage on the corrosion resistance of steel rebars?: Improper storage of steel rebars can significantly reduce their corrosion resistance. Factors such as exposure to moisture, high humidity, direct contact with water, and inadequate ventilation can accelerate the corrosion process. This can lead to the formation of rust and ultimately compromise the structural integrity of the rebars. Therefore, proper storage is crucial to maintain the corrosion resistance and overall durability of steel rebars.

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