ASTM, GB Standard Hot Rolled Deformed Steel Rebars

ASTM, GB Standard Hot Rolled Deformed Steel Rebars System 1

ASTM, GB Standard Hot Rolled Deformed Steel Rebars

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Loading Port:: Lianyungang

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 200000 m.t./month

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Specifications of ASTM, GB Standard Hot Rolled Deformed Steel Rebars:

Standard	GB	HRB400
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Place of origin	Hebei, China mainland
Advantages	exact size, regular package, chemical and mechanical properties are stable.
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
HRB400	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045		0.04-0.12
	Physical capability
	Yield Strength (N/cm²)		Tensile Strength (N/cm²)			Elongation (%)
	≥400		≥570			≥14

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 ASTM, GB Standard Hot Rolled Deformed Steel Rebars:

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 ASTM, GB Standard Hot Rolled Deformed Steel Rebars:

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

Payment term: TT or L/C

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 container

Deformed Steel Bar in factory

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: Are steel rebars susceptible to rusting?: Yes, steel rebars are susceptible to rusting due to their iron content.

Q: What are the different methods of reinforcing concrete with steel rebars?: There are several methods commonly used for reinforcing concrete with steel rebars. These methods are designed to enhance the strength and durability of the concrete structure, preventing cracking and failure under various loads and environmental conditions. Here are some of the different methods used: 1. Traditional Reinforcement: This method involves placing steel rebars in a grid pattern within the concrete formwork before pouring the concrete. The rebars are typically arranged in both horizontal and vertical directions, forming a network of reinforcement throughout the structure. This technique is commonly used in buildings, bridges, and other large-scale concrete structures. 2. Post-Tensioning: Post-tensioning is a technique used in large-scale structures where high tensile strength is required. In this method, steel rebars are tensioned after the concrete has been poured and hardened. The rebars are placed in ducts or sleeves within the concrete and then tensioned using hydraulic jacks. This process helps to reduce the tensile stresses within the concrete, making it more resistant to cracking and improving its load-bearing capacity. 3. Pre-Tensioning: Pre-tensioning is a similar technique to post-tensioning, but the tensioning of the steel rebars is done before the concrete is poured. The rebars are typically placed in a precast concrete form, and then tensioned using hydraulic jacks. After the concrete has hardened, the tensioned rebars transfer their force to the concrete, increasing its strength and reducing the risk of cracking. 4. Welded Wire Mesh: Welded wire mesh is a method of reinforcing concrete that involves using a grid of welded steel wires instead of individual rebars. The mesh is typically made of high-strength steel wires, welded together at intersections. This method is commonly used in smaller concrete structures, such as sidewalks, driveways, and patios. Welded wire mesh provides a uniform reinforcement throughout the concrete, reducing the risk of cracking. 5. Fiber Reinforced Concrete: Fiber reinforced concrete (FRC) is a method of reinforcement that involves adding small, discrete fibers to the concrete mix. These fibers can be made of various materials, such as steel, glass, or synthetic polymers. The fibers are distributed throughout the concrete mix, enhancing its tensile strength and reducing cracking. FRC is commonly used in applications where traditional steel rebars are not feasible, such as thin slabs, precast elements, or shotcrete. Overall, these different methods of reinforcing concrete with steel rebars provide engineers and construction professionals with various options to enhance the strength, durability, and performance of concrete structures. The choice of method depends on factors such as the size and type of the structure, the required strength, and the construction constraints. It is essential to consider these factors and consult with engineering professionals to determine the most suitable method for each specific project.

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: What is the process of cutting steel rebars on-site?: The process of cutting steel rebars on-site typically involves the use of specialized tools such as a rebar cutter or a rebar saw. The rebars are measured and marked at the desired length, and then the cutting tool is used to make precise cuts through the steel. Safety precautions such as wearing protective gear and ensuring a stable work surface are important during this process.

Q: What is the lifespan of steel rebars in different environments?: The lifespan of steel rebars can vary depending on the environment they are exposed to. In general, steel rebars have a long lifespan and can last for many decades in most environments. However, in harsh or corrosive environments such as coastal areas with high salt content or industrial areas with chemical exposure, the lifespan may be reduced. Proper maintenance and protective measures, such as coatings or cathodic protection, can significantly increase the lifespan of steel rebars in these environments.

Q: What is the role of steel rebars in the construction of highway overpasses?: Steel rebars play a crucial role in the construction of highway overpasses as they provide reinforcement and strength to the concrete structures. Rebars are used to reinforce the concrete, preventing cracks and improving its resistance to tension and bending forces. This reinforcement ensures the durability, stability, and overall safety of the highway overpasses, allowing them to withstand heavy loads and harsh external conditions.

Q: What is the bending capacity of steel rebars?: The bending capacity of steel rebars depends on various factors such as the diameter, grade, and reinforcement detailing. Generally, steel rebars have high bending capacity due to their inherent strength and ductility. However, the specific bending capacity can vary and should be determined based on engineering calculations and design standards.

Q: Can steel rebars be used in the construction of educational institutions?: Yes, steel rebars can be used in the construction of educational institutions. Steel rebars are commonly used in reinforced concrete structures to provide strength and reinforcement. They help to strengthen the concrete and improve its resistance to structural loads, making them suitable for use in various construction projects, including educational institutions.

Q: What are the different types of coatings available for steel rebars?: There are several types of coatings available for steel rebars, including epoxy coatings, galvanized coatings, and polymer coatings. Epoxy coatings are commonly used to provide corrosion protection and improve bond strength. Galvanized coatings involve applying a layer of zinc to the rebar's surface, offering excellent corrosion resistance. Polymer coatings are also used to protect against corrosion and enhance durability, often including additives like epoxies, polyurethanes, or polyethylene.

Q: Are there any specific guidelines for handling and storing steel rebars?: Yes, there are specific guidelines for handling and storing steel rebars to ensure their quality and safety. Some of the key guidelines include: 1. Proper handling: Steel rebars should be handled with care to avoid any damage or bending. They should be lifted using appropriate equipment and not dragged or thrown. 2. Storage conditions: Rebars should be stored in a clean, dry, and well-ventilated area to prevent rusting and corrosion. They should be kept off the ground and away from moisture, chemicals, and direct sunlight. 3. Stacking: Rebars should be stacked in a way that ensures stability and prevents any deformation. They should be placed on flat surfaces and stacked in layers with wooden or rubber separators to avoid direct contact between rebars. 4. Labelling: Each bundle of rebars should be properly labeled with relevant information such as size, grade, and quantity for easy identification and inventory management. 5. Inspection: Regular inspections should be conducted to check for any signs of damage, rust, or corrosion. Damaged or corroded rebars should be discarded or repaired before use. Adhering to these guidelines is crucial to maintain the quality and integrity of steel rebars, ensuring their suitability for construction purposes.

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