Hot rolled high quality deformed bar ASTM A615 GR40

Hot rolled high quality deformed bar ASTM A615 GR40 System 1

Hot rolled high quality deformed bar ASTM A615 GR40

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Loading Port:: Qingdao

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 m.t./month

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Deformed Bar Details：

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

Steel Rebar / Deformed Bar / Reinforcing Bar

Q:How do steel rebars contribute to the overall aesthetics of a structure?: Steel rebars do not directly contribute to the overall aesthetics of a structure as they are typically hidden within the concrete. However, their use ensures structural integrity and strength, which indirectly enhances the overall appearance by providing a solid foundation for the design elements and finishes of the structure.

Q:What is the effect of aging on the properties of steel rebars?: The effect of aging on the properties of steel rebars is generally negative. Over time, steel rebars may experience gradual deterioration due to factors such as corrosion, fatigue, and stress. This can lead to a reduction in their structural integrity and load-bearing capacity. Aging can also cause an increase in brittleness, making rebars more prone to fractures and failures. Therefore, regular inspections, maintenance, and potentially replacement of aged rebars are crucial to ensure the safety and longevity of structures.

Q:How do steel rebars affect the fire resistance of concrete structures?: Steel rebars can significantly enhance the fire resistance of concrete structures. The presence of steel rebars in concrete acts as reinforcement, providing added strength and stability to the structure. This reinforcement helps the concrete withstand the intense heat generated during a fire. The fire resistance of concrete structures is primarily due to the low thermal conductivity of concrete. When exposed to high temperatures, concrete undergoes a process called spalling, where the outer layer of the concrete breaks off due to the rapid expansion of water trapped within. However, the presence of steel rebars helps minimize spalling by holding the concrete together, preventing it from falling apart. Furthermore, steel rebars have a higher melting point compared to concrete. This means that even when exposed to extreme heat, the steel rebars retain their strength and integrity. As a result, the overall structural stability of the concrete structure is maintained, even under fire conditions. Steel rebars also act as a heat sink, absorbing and dissipating heat away from the surrounding concrete. This heat dissipation prevents localized hotspots from forming and spreading throughout the structure, minimizing the risk of structural failure. To improve the fire resistance of concrete structures further, special types of steel rebars, known as fire-resistant or fire-rated rebars, can be used. These rebars are specifically designed to withstand high temperatures for extended periods without losing their strength. They are often coated with materials such as epoxy or intumescent coatings that provide additional protection against fire. In conclusion, steel rebars play a crucial role in enhancing the fire resistance of concrete structures. Their presence improves the overall structural stability, minimizes spalling, dissipates heat, and provides added strength to withstand the intense heat generated during a fire.

Q:How do steel rebars affect the cost of a construction project?: Steel rebars can significantly affect the cost of a construction project in several ways. Firstly, steel rebars are commonly used in reinforced concrete structures to provide strength and stability. The quantity and quality of rebars required for a project depend on factors such as the size, design, and intended use of the structure. The cost of steel rebars itself is a major factor. The price of steel rebars fluctuates due to market conditions, availability, and demand, so it can significantly impact the overall project cost. Additionally, the grade and quality of steel rebars can also vary, with higher grades generally being more expensive. Furthermore, the quantity of steel rebars needed directly affects the cost. Large-scale projects that require a significant amount of steel rebars, such as high-rise buildings or infrastructure projects, can have substantial rebar expenses. The cost is influenced by factors such as the size and complexity of the structure, as well as the engineering and design requirements. Labor costs associated with handling, cutting, bending, and placing the rebars are another consideration. Skilled labor is required to properly install rebars, ensuring they are correctly positioned and secured. The more complex the structure or design, the more labor-intensive and time-consuming the rebar installation becomes, resulting in higher labor costs. Additionally, the use of steel rebars can impact project scheduling and timelines. It may require additional time for the procurement, delivery, and installation of rebars, which can potentially delay the overall construction schedule. Any delays can lead to increased project costs due to extended labor and overhead expenses. Lastly, the long-term cost implications of using steel rebars need to be considered. Steel rebars provide durability and strength to concrete structures, which can result in reduced maintenance and repair costs over the lifespan of the project. Investing in high-quality rebars initially can save money in the long run by minimizing the need for future repairs or replacements. In conclusion, the use of steel rebars significantly affects the cost of a construction project. The cost of the rebars themselves, the quantity required, labor expenses, project scheduling, and long-term durability considerations all contribute to the overall impact on the project cost. It is essential for construction professionals to carefully analyze and plan for these factors to ensure accurate cost estimations and successful project execution.

Q:Are there any alternatives to steel rebars in construction?: Yes, there are several alternatives to steel rebars in construction. Some common alternatives include fiber-reinforced polymer (FRP) rebars, basalt rebars, and glass fiber-reinforced polymer (GFRP) rebars. These alternatives offer advantages such as high corrosion resistance, lightweight, and improved durability while maintaining similar or better structural properties compared to steel rebars. However, the choice of alternative rebars depends on factors such as cost, specific project requirements, and local building codes and regulations.

Q:What is the average diameter of steel rebars used in construction?: The average diameter of steel rebars used in construction typically ranges between 6 millimeters (mm) to 40 mm. However, the specific diameter of the steel rebars may vary depending on the requirements of the construction project and the structural design. It is important to note that different countries or regions may have their own set of standards and regulations regarding the diameter and other specifications of steel rebars used in construction. Therefore, it is advisable to consult the local building codes and engineering professionals to determine the appropriate diameter of steel rebars for a specific construction project.

Q:How are steel rebars measured and cut on construction sites?: Steel rebars are typically measured and cut on construction sites using a variety of tools and techniques. Firstly, rebars are measured using measuring tapes or rulers to ensure they meet the required length specifications. Once the measurements are taken, rebars are cut using specialized tools such as rebar cutters, rebar benders, or hacksaws. Some construction sites may also use portable hydraulic shears or electric rebar cutting machines for larger projects. These tools allow precise and efficient cutting of steel rebars to the desired lengths, ensuring they fit properly in the construction project.

Q:How do steel rebars impact the overall constructability and scheduling of concrete projects?: Steel rebars play a crucial role in the overall constructability and scheduling of concrete projects. These reinforcing bars are essential for providing strength and stability to concrete structures, ensuring their durability and resilience. Firstly, steel rebars enhance the constructability of concrete projects by providing reinforcement and support to the concrete. By adding rebars within the concrete, the overall structural integrity of the project is significantly improved. This reinforcement allows for the construction of taller and more complex structures, as the rebars help distribute the load and resist tension and compression forces. Moreover, steel rebars facilitate the scheduling of concrete projects. When properly planned and incorporated, rebars can expedite construction timelines. By incorporating rebars into the concrete formwork, construction teams can efficiently pour and shape the concrete, reducing the time required for curing and achieving the desired strength. This has a direct impact on project scheduling, allowing for faster construction progress and potential cost savings. Additionally, the use of steel rebars in concrete projects enables flexibility in design and construction. The ability to customize the placement, size, and spacing of rebars ensures that the concrete structure meets the specific design requirements and intended functionality. This flexibility is particularly important in projects that require intricate architectural features or specific load-bearing capacities. However, it is essential to note that the proper installation and coordination of steel rebars can pose challenges in terms of scheduling. Rebar installation must be carefully coordinated with other construction activities to avoid delays. Furthermore, quality control measures are crucial to ensure the correct placement and alignment of rebars, as any errors or deficiencies can impact the overall quality and safety of the project. In conclusion, steel rebars have a significant impact on the constructability and scheduling of concrete projects. They enhance the overall strength and stability of concrete structures, allowing for the construction of more intricate and robust designs. Additionally, the proper incorporation of rebars can expedite construction timelines and provide flexibility in project scheduling. However, careful planning, coordination, and quality control are necessary to ensure the successful integration of rebars in concrete projects.

Q:Can steel rebars be painted or coated?: Steel rebars can indeed be painted or coated, a common practice in construction and engineering for protecting against corrosion and enhancing their appearance. The procedure involves applying a layer of paint or coating substance onto the rebars' surface. This protective layer acts as a barrier, preventing moisture and other corrosive elements from reaching the steel, thereby extending the rebars' lifespan. Furthermore, painting or coating the rebars aids in distinguishing them from other construction materials or facilitating color-coded identification. It is crucial to utilize top-notch paint or coating materials specifically formulated for steel applications to ensure adequate adhesion and durability.

Q:What are the guidelines for the proper spacing of steel rebars in slabs?: The guidelines for the proper spacing of steel rebars in slabs are crucial to ensure the structural integrity and strength of the concrete slab. Here are the general guidelines to follow: 1. Rebar Diameter: The diameter of the steel rebar should be determined based on the load and design requirements. Common rebars sizes range from 6mm to 32mm. 2. Spacing: The spacing between rebars is determined by the thickness of the slab and the design specifications. As a general rule, the spacing should not exceed three times the slab thickness. For example, if the slab thickness is 150mm, the maximum spacing between rebars should be 450mm. 3. Edge Distance: The distance between the rebar and the edge of the slab is also crucial. The minimum edge distance should be at least 50mm to prevent cracking and ensure proper load distribution. 4. Clear Cover: The clear cover refers to the distance between the rebar and the surface of the slab. It is essential to provide sufficient clear cover to protect the rebar from corrosion. The clear cover requirements vary depending on the environmental conditions, but commonly range from 20mm to 40mm. 5. Reinforcement Ratio: The reinforcement ratio is the amount of steel reinforcement used per unit area of the slab. This ratio is determined by the load requirements and the design specifications. Typically, the reinforcement ratio ranges from 0.5% to 2%. 6. Lap Splicing: In cases where the length of the rebar is insufficient, lap splicing is required. The lap length should be determined based on the rebar diameter, grade, and design requirements. 7. Placement: The rebars should be placed accurately and securely inside the slab formwork. Proper alignment and placement ensure that the rebars are positioned correctly to resist the anticipated loads. It is important to note that these guidelines are general and may vary depending on the specific project, structural design, and local building codes. It is recommended to consult with a structural engineer or refer to the relevant building codes and standards for precise guidelines specific to your project.

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