Deformed Bar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Supply Capability:: -

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Product Description:

Specifications of HRB400 Deformed Steel Bar:

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 HRB400 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 HRB400 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

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

Q: 8 mm thread steel, how much is a bundle?: A bundle should say the exact number, and the theoretical weight of the 8 mm thread steel and 8 mm round bar is equal! They weigh 0.395 kilos per metre.

Q: What is the difference between rebar bolts and steel bars?: Rebar is only material, and thread steel bolt is the product after the thread steel is processed.

Q: What is the process of inspecting steel rebars on-site?: The process of inspecting steel rebars on-site involves several steps to ensure the quality and adherence to specifications. 1. Visual Inspection: The inspector starts by visually examining the rebars for any visible defects or damage, such as rust, cracks, bends, or improper dimensions. This helps identify any immediate issues that need attention. 2. Measurement: Accurate measurements are crucial to ensure the rebars meet the required dimensions. Using tools like calipers or measuring tapes, the inspector checks the length, diameter, and shape of each rebar, comparing them against the project specifications. 3. Chemical Analysis: Some projects may require chemical analysis of the steel rebars to confirm their composition and strength. Samples are taken from different batches of rebars and sent to a lab for testing. The results determine whether the rebars meet the required standards. 4. Non-Destructive Testing (NDT): NDT techniques are employed to evaluate the internal integrity of the rebars without damaging them. Methods like ultrasonic testing, magnetic particle inspection, or radiography are used to detect any hidden defects such as cracks, voids, or inclusions. 5. Weld Inspection: If welding is involved, the inspector checks the welds for proper penetration, alignment, and quality. This ensures the integrity and strength of the joint. 6. Documentation: Throughout the inspection process, the inspector maintains detailed records of the inspections conducted, measurements taken, test results, and any identified defects. These documents serve as evidence of compliance and can be referred to in case of disputes or future reference. 7. Reporting and Communication: After completing the inspection, the inspector prepares a detailed report summarizing the findings. This report is shared with the project management team, engineers, and other relevant stakeholders, highlighting any non-compliance, defects, or areas that need attention. Overall, the process of inspecting steel rebars on-site is a comprehensive and systematic approach that ensures the quality, integrity, and compliance of the rebars with the project specifications and industry standards.

Q: How are steel rebars protected against corrosion in aggressive environments?: Steel rebars are protected against corrosion in aggressive environments through various methods. One common method is the use of protective coatings. These coatings can be applied to the surface of rebars to create a barrier between the steel and the corrosive elements in the environment. Examples of protective coatings include epoxy, zinc, and polyethylene coatings. In addition to coatings, steel rebars can also be protected through cathodic protection. This method involves connecting the rebar to a sacrificial anode, usually made of a more reactive metal such as zinc or magnesium. The anode corrodes instead of the rebar, effectively sacrificing itself to protect the steel from corrosion. Another method of protection is the use of corrosion inhibitors. These inhibitors can be added to the concrete mix or applied directly to the rebars. They work by reducing the corrosive potential of the environment or by forming a protective film on the surface of the rebar, preventing corrosion from occurring. Furthermore, proper design and construction practices can also contribute to the protection of steel rebars against corrosion. Adequate concrete cover can help create a physical barrier between the rebar and the aggressive environment, reducing the exposure of the steel to corrosive elements. Good drainage systems and the use of non-corrosive aggregates can also help minimize the exposure of rebars to moisture and other corrosive substances. Overall, a combination of protective coatings, cathodic protection, corrosion inhibitors, and proper design and construction practices are employed to ensure the protection of steel rebars against corrosion in aggressive environments. These measures help extend the lifespan of structures and maintain their structural integrity.

Q: Are steel rebars fire resistant?: Yes, steel rebars are fire resistant.

Q: What is the role of steel rebars in basement wall construction?: The role of steel rebars in basement wall construction is to provide reinforcement and structural support to the concrete wall. Steel rebars, also known as reinforcing bars, are typically made of carbon steel and are placed in the concrete before it is poured. The rebars are strategically positioned within the concrete to add strength and stability to the wall. They help to distribute the load and forces that the wall may encounter, such as soil pressure or lateral forces from the surrounding environment. This reinforcement prevents the wall from cracking or collapsing under these external pressures, ensuring its durability and structural integrity. In addition to reinforcing the basement wall, steel rebars also help to control shrinkage and expansion of the concrete due to temperature changes. By providing a framework within the wall, the rebars help to limit the formation of cracks and maintain the overall stability of the structure. Overall, the presence of steel rebars in basement wall construction significantly enhances the strength and durability of the concrete wall. They play a crucial role in ensuring the integrity of the structure and protecting it from potential damage or failure.

Q: What is the process of straightening steel rebars?: To ensure proper alignment and eliminate any bends or deformities, steel rebars must undergo a series of steps during the straightening process. To begin with, a thorough examination is conducted to identify any visible defects like twists, kinks, or bends. This initial assessment is crucial in determining the extent of straightening required and whether any rebars need replacement. Once the inspection is finalized, the rebars are loaded onto a straightening machine. This machine features rotating rollers or hydraulic pressure devices that exert force on the rebars to realign them. The rebars are fed through the rollers or placed amidst the hydraulic devices, and gradual pressure is applied to reshape the bars and eliminate any bends or twists. During the straightening procedure, it is of utmost importance to maintain control over the applied force to avoid excessive straightening or further damage to the rebars. Skilled operators supervise the machine and adjust the pressure accordingly to ensure precise straightening. Following the straightening process, a final inspection is conducted to confirm that the rebars meet the required specifications. This inspection consists of checking for any remaining deformities, ensuring the rebars are of the correct length, and verifying that they are straight within acceptable tolerances. It is worth noting that the straightening process may vary depending on the type and size of the rebars. For larger or more complex rebars, different machines and techniques may be employed. Additionally, the process may involve preheating the rebars to enhance their malleability before straightening. All in all, the process of straightening steel rebars involves meticulous inspection, the utilization of specialized machinery, skilled operators, and a final inspection to ensure the rebars are straight, aligned, and ready for use in diverse construction projects.

Q: How do steel rebars prevent cracking in concrete structures?: Steel rebars prevent cracking in concrete structures by providing reinforcement and strength. When concrete is poured, it is initially strong in compression but weak in tension. The rebars, made of high-strength steel, are embedded in the concrete to counteract this weakness. They absorb the tensile forces that occur due to bending or stretching of the concrete, preventing it from cracking. The rebars distribute the stress evenly throughout the structure, increasing its overall strength and durability. Additionally, rebars help to control the width and extent of any cracks that may occur, ensuring that the concrete structure remains stable and safe.

Q: What are steel rebars used for?: Steel rebars are used in construction to reinforce and strengthen concrete structures, such as buildings, bridges, and highways.

Q: Can steel rebars be used in high-security facility construction?: Yes, steel rebars can be used in high-security facility construction. Steel rebars provide enhanced strength and durability, making them suitable for reinforcing structures in high-security facilities where robustness and resistance against external threats are crucial.

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