Deformed bars in Grade HRB400 with High Quality

Deformed bars in Grade HRB400 with High Quality System 1

Deformed bars in Grade HRB400 with High Quality

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 100000 m.t./month

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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: What are the factors that affect the strength of steel rebars?: Several factors can affect the strength of steel rebars: 1. Composition: The composition of the steel bar plays a crucial role in determining its strength. Steel rebars typically have a carbon content ranging from 0.15% to 0.6%, which affects their hardness and strength. Other elements such as manganese, silicon, and sulfur can also impact the strength of the rebar. 2. Manufacturing process: The process used to manufacture steel rebars can influence their strength. The bars are generally made through hot rolling, which involves heating the steel billets to high temperatures and then passing them through rollers to shape them. The cooling rate during the manufacturing process can affect the internal microstructure of the bar, leading to variations in strength. 3. Size and shape: The size and shape of the rebar can affect its strength. Thicker and larger diameter rebars generally have higher strength capacities compared to thinner ones. Similarly, the shape of the rebar, whether it is a plain round bar or has deformations like ribs, can also impact its strength. 4. Heat treatment: Certain heat treatment processes can be applied to steel rebars to enhance their strength. For example, quenching and tempering involve heating the rebar to a high temperature and then rapidly cooling it to increase its strength and hardness. The specific heat treatment process used will depend on the desired strength requirements. 5. Corrosion: Corrosion can significantly reduce the strength of steel rebars over time. When exposed to moisture and oxygen, steel rebars can rust, leading to structural degradation. Proper corrosion protection measures, such as epoxy coating or galvanization, can help maintain the strength and durability of the rebars. 6. Loading conditions: The strength of steel rebars can be influenced by the type and magnitude of the applied loads. Different applications require rebars with varying strength capacities. The design and engineering of structures should consider the expected loads to determine the appropriate strength of the rebars used. Overall, the strength of steel rebars is influenced by their composition, manufacturing process, size and shape, heat treatment, corrosion protection, and the loading conditions they will be subjected to. It is essential to consider these factors when selecting and using steel rebars in construction projects.

Q: Can steel rebars be used in modular bridge construction?: Modular bridge construction utilizes steel rebars, also known as reinforcing bars, to enhance the structural integrity of precast concrete elements. This construction method offers efficiency and cost-effectiveness. Precast elements are fabricated in a controlled environment, ensuring consistent production and high-quality outcomes. The steel rebars are accurately incorporated into the elements during manufacturing, eliminating the need for on-site rebar installation. Steel rebars play a crucial role in withstanding the loads and stresses experienced by bridges. They distribute the load evenly, preventing concrete elements from cracking or failing. By incorporating steel rebars into modular bridge construction, the durability and longevity of the bridge structure are ensured. The integration of steel rebars in the modular bridge design allows for flexibility and customization. Different sizes and configurations of rebars can be used to meet the specific requirements of each bridge project, optimizing its structural performance. In summary, steel rebars are extensively utilized in modular bridge construction due to their ability to reinforce, strengthen, and enhance the durability of precast concrete elements. This approach offers a cost-effective and efficient construction process while maintaining the structural integrity of the bridge.

Q: What is the process of removing rust from steel rebars?: There are several steps involved in the process of removing rust from steel rebars. Firstly, inspect and assess the rust damage on the rebars. Determine whether the rust is superficial or deeply penetrated and evaluate the overall structural integrity. Before starting the rust removal process, ensure that you have the appropriate personal protective equipment (PPE) on, such as gloves, goggles, and a respirator. This is necessary to protect yourself from any harmful chemicals or debris that may be generated. To clean the surface of the rusted rebars, use a wire brush or a grinder with a brush attachment. This will help remove loose rust, dirt, and other debris. Make sure to thoroughly clean the surface before proceeding. Apply a rust converter or rust remover solution to the rusted areas of the rebar. These solutions contain chemicals that react with the rust, either converting it into a stable compound or dissolving it completely. Follow the manufacturer's instructions for the specific product being used. If the rust has not completely dissolved or converted after the chemical treatment, mechanical methods may be required. This can involve sanding the surface with sandpaper or using a wire brush to scrub off the remaining rust. Once the rust has been removed, rinse the rebars thoroughly with clean water to remove any residual chemicals or debris. Allow the rebars to dry completely before applying any further treatment or protective coatings. To prevent future rusting, it is important to apply a protective coating or paint to the rebars. This acts as a barrier against moisture and air, which are the main causes of rust formation. Choose a high-quality rust-resistant primer and paint specifically designed for steel reinforcement bars. It should be noted that removing rust from steel rebars requires expertise and adherence to safety precautions. In some cases, severe rust damage may require professional assistance or even replacement of the affected rebars.

Q: Can steel rebars be used in the construction of hospitals and healthcare facilities?: Yes, steel rebars can be used in the construction of hospitals and healthcare facilities. Steel rebars provide strength, durability, and resistance to corrosion, making them suitable for reinforcing concrete structures in these critical facilities. They ensure structural integrity and enhance the overall safety and longevity of the buildings, meeting the stringent requirements and codes set for healthcare infrastructure.

Q: What is the difference between carbon steel and stainless steel rebars?: Both carbon steel and stainless steel rebars are utilized in construction as types of steel reinforcement. However, they differ significantly in their composition and properties. Carbon steel rebars consist of a combination of iron and carbon, with trace amounts of other elements like manganese and copper. The carbon content in these rebars typically ranges from 0.15% to 0.60%. They possess strength, durability, and cost-effectiveness. Their tensile strength is crucial for reinforcing concrete structures. Nevertheless, they are prone to corrosion if not adequately protected, especially in environments with high moisture or exposure to chemicals. On the contrary, stainless steel rebars are created by combining iron, chromium, nickel, and other alloying elements. The chromium content in stainless steel usually exceeds 10.5%, leading to the formation of a protective layer of chromium oxide on the rebar's surface, which prevents corrosion. Stainless steel rebars exhibit exceptional corrosion resistance, even in harsh environments with high humidity, saltwater, or exposure to chemicals. Additionally, they are highly durable and possess high tensile strength, similar to carbon steel rebars. The primary distinction between carbon steel and stainless steel rebars lies in their corrosion resistance. Carbon steel rebars necessitate the application of protective coatings like epoxy or galvanization to prevent corrosion. In contrast, stainless steel rebars possess inherent corrosion resistance due to the presence of the chromium oxide layer, eliminating the need for additional coatings. Another differing factor is the cost. Carbon steel rebars are generally more affordable compared to stainless steel rebars. However, the total project cost should also consider the long-term maintenance expenses associated with corrosion protection measures required for carbon steel rebars. To summarize, carbon steel rebars are strong and cost-effective but require supplementary corrosion protection, while stainless steel rebars exhibit excellent corrosion resistance and durability at a higher cost. The selection between the two depends on the specific project requirements, budget constraints, and anticipated environmental conditions.

Q: What is the maximum spacing allowed between steel rebars in a concrete structure?: The maximum spacing allowed between steel rebars in a concrete structure depends on various factors such as the size and strength of the rebars, the design requirements, and the intended use of the structure. However, a general guideline is that the spacing between rebars should not exceed three times the diameter of the largest bar being used. This ensures proper reinforcement and structural integrity of the concrete.

Q: How do steel rebars affect the overall crack width of concrete structures?: Steel rebars can significantly reduce the overall crack width of concrete structures. By reinforcing the concrete, rebars help distribute and resist tensile forces, preventing cracks from widening or forming in the first place. This reinforcement enhances the structural integrity and durability of the concrete, ensuring it can withstand external loads and environmental factors.

Q: What are the common mistakes to avoid while using steel rebars?: Some common mistakes to avoid while using steel rebars include improper placement and spacing, insufficient concrete cover, using rusty or damaged rebars, improper anchoring or tying, and neglecting to clean and prepare the rebars before installation.

Q: What is the process of straightening steel rebars?: The process of straightening steel rebars involves several steps to ensure the rebars are properly aligned and free from any bends or deformities. Firstly, the rebars are carefully inspected for any visible defects such as twists, kinks, or bends. This initial inspection is important to determine the extent of straightening required and whether any rebars need to be replaced. Once the inspection is complete, the rebars are loaded onto a straightening machine. This machine consists of rotating rollers or hydraulic pressure devices that apply force to the rebars to straighten them. The rebars are fed through the rollers or placed between the hydraulic devices, and pressure is applied gradually to reshape the bars and remove any bends or twists. During the straightening process, it is crucial to maintain control over the applied force to prevent over-straightening or causing any further damage to the rebars. Skilled operators monitor the machine and adjust the pressure accordingly to ensure the rebars are straightened accurately. After the rebars have been straightened, they undergo a final inspection to verify that they meet the required specifications. This inspection includes checking for any remaining deformities, ensuring the rebars are of the correct length, and confirming that they are straight within acceptable tolerances. It is important to note that the straightening process can vary depending on the type and size of the rebars. Different machines and techniques may be used for larger or more complex rebars. Additionally, the process may involve heating the rebars prior to straightening to make them more malleable. Overall, the process of straightening steel rebars involves careful inspection, the use of specialized machinery, skilled operators, and a final inspection to ensure the rebars are straight, aligned, and ready for use in various construction projects.

Q: How are steel rebars cut on-site?: Steel rebars are typically cut on-site using a variety of tools such as a rebar cutter or a portable hydraulic shear. These tools are specifically designed to provide precise and efficient cutting of steel rebars, ensuring that they are accurately sized for construction purposes.

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