ASTM GR60 deformed steel bar for construction

ASTM GR60 deformed steel bar for construction System 1

ASTM GR60 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:: 100000 m.t./month

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Product Description:

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

FAQ:

Q1: Why buy Materials & Equipment from OKorder.com?

A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.

Q4: What makes stainless steel stainless?

A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.

ASTM GR60 deformed steel bar for construction

Q: What are the factors that determine the spacing of steel rebars in a concrete structure?: The spacing of steel rebars in a concrete structure is determined by several factors that ensure the structural integrity and strength of the concrete. These factors include: 1. Structural Design: The spacing of rebars is influenced by the structural design requirements and specifications of the concrete structure. Engineers consider the loads, stresses, and forces that the structure will experience and calculate the required reinforcement spacing accordingly. 2. Concrete Strength: The strength of the concrete being used in the structure is an essential factor in determining rebar spacing. Higher-strength concrete may require closer spacing of rebars to provide adequate reinforcement and prevent cracking or failure under load. 3. Rebar Diameter: The diameter of the steel rebars also plays a role in determining the spacing. Thicker or larger diameter rebars may require wider spacing, whereas thinner rebars typically require closer spacing to provide the desired reinforcement. 4. Bar Bending and Placing: The ease of bending and placing the rebars during construction is another important factor. The spacing is often determined by practical considerations, such as ensuring proper access for workers and equipment, and facilitating the concrete pouring process. 5. Environmental Factors: Environmental conditions, such as exposure to corrosive substances or extreme weather conditions, can influence the spacing of rebars. Closer spacing may be required in corrosive environments to provide additional protection against rust and deterioration. 6. Building Codes and Regulations: Building codes and regulations set by local authorities or relevant organizations also dictate the minimum requirements for rebar spacing in concrete structures. These codes ensure compliance with safety standards and provide guidelines for construction practices. Overall, the spacing of steel rebars in a concrete structure is a critical aspect of ensuring its strength, durability, and resilience. It is determined by a combination of structural design, concrete strength, rebar diameter, construction practicalities, environmental considerations, and adherence to building codes and regulations.

Q: Are steel rebars suitable for use in high-temperature applications?: High-temperature applications are generally not suitable for the use of steel rebars. Despite being a strong and durable material, steel has limitations when exposed to high temperatures. It can undergo a significant reduction in strength and even a loss of structural integrity, leading to potential failures. When subjected to high temperatures, steel goes through a process known as thermal expansion, which can weaken and deform it. This phenomenon is particularly noticeable in rebars, which are commonly used to reinforce concrete structures. The high temperatures cause the rebars to expand, exerting excessive pressure on the surrounding concrete. This pressure can result in cracks and potentially compromise the stability of the structure. Furthermore, prolonged exposure to high temperatures can cause a loss of the steel's mechanical properties, including its tensile strength and load-bearing capacity. As a result, the rebars become less effective in resisting external forces and reinforcing the concrete. For this reason, it is generally recommended to consider alternative materials, such as stainless steel or special alloys, for high-temperature applications. These materials are specifically designed to withstand elevated temperatures without compromising their structural integrity. To ensure safety and structural stability, it is important to consult with experts and engineers who are familiar with high-temperature applications in order to determine the most suitable materials for specific projects.

Q: Can steel rebars be used in reinforced masonry construction?: Yes, steel rebars can be used in reinforced masonry construction. Rebars are commonly used to reinforce masonry structures, providing additional strength and stability to the overall construction.

Q: How do steel rebars help in distributing load in a structure?: Steel rebars, also known as reinforcement bars, play a crucial role in distributing load in a structure. They are primarily used in reinforced concrete structures to enhance their strength and durability. Rebars are placed strategically within the concrete to counteract the tensile forces that the structure may encounter. Concrete, while strong in compression, is weak in tension. When a load is applied to a structure, such as a building or a bridge, it creates tensile forces that can cause the concrete to crack and fail. By incorporating steel rebars into the concrete, these tensile forces are effectively distributed and transferred to the rebars, preventing the structure from experiencing excessive deflection or collapse. The presence of steel rebars within the concrete creates a composite material that combines the compressive strength of concrete with the high tensile strength of steel. As a result, the structure becomes capable of withstanding a wide range of loads, including dead loads (the weight of the structure itself), live loads (such as occupants or furniture), and environmental loads (like wind or earthquakes). Additionally, rebars also help to control and minimize the propagation of cracks within the concrete. When a crack forms under load, the rebars act as a barrier, preventing the crack from spreading further and compromising the integrity of the structure. This inhibits the development of larger cracks, which could potentially lead to structural failure. Moreover, steel rebars provide stability and reinforcement at critical locations within the structure, such as corners, joints, and areas prone to high stress. By reinforcing these vulnerable areas, the rebars ensure that the load is evenly distributed throughout the structure, reducing the risk of localized failures. In summary, steel rebars are essential in distributing load in a structure by absorbing tensile forces, enhancing the strength of concrete, preventing cracks from propagating, and providing reinforcement at critical locations. They significantly contribute to the overall structural integrity and safety, making them a vital component in construction projects.

Q: How do steel rebars affect the thermal properties of concrete?: Steel rebars can have both positive and negative effects on the thermal properties of concrete. On one hand, the presence of steel rebars can increase the overall thermal conductivity of the concrete. This means that heat can be transferred more easily through the concrete, allowing for a more efficient heat transfer and distribution within the structure. This can be beneficial in applications where thermal conductivity is desired, such as in buildings with radiant heating systems. On the other hand, the thermal expansion and contraction characteristics of steel and concrete are different. This difference in thermal expansion coefficients can lead to the development of thermal stresses and potential cracking within the concrete, especially during temperature variations. These cracks can compromise the structural integrity of the concrete and may require additional reinforcement measures to mitigate the effects. Overall, the presence of steel rebars can impact the thermal properties of concrete by increasing its thermal conductivity and potentially leading to the development of thermal stresses and cracks. It is important to consider these factors during the design and construction process to ensure the desired performance and longevity of the concrete structure.

Q: What is the impact of steel rebars on the overall sustainability of a project?: Steel rebars have a significant impact on the overall sustainability of a project. Firstly, steel rebars enhance the structural integrity of buildings and infrastructure, ensuring longevity and reducing the need for frequent repairs or replacements. Additionally, steel is a highly recyclable material, allowing for the reuse of rebars in future projects, thereby reducing the demand for new resources. Moreover, steel rebars contribute to the energy efficiency of a project by providing thermal mass and improving insulation. Lastly, the use of steel rebars promotes safety and resilience, as they enhance the resistance of structures against natural disasters and other external forces.

Q: How do steel rebars affect the constructability of complex architectural designs?: Steel rebars play a crucial role in the constructability of complex architectural designs. These reinforced bars provide structural integrity and strength to concrete elements, making it possible to create intricate and innovative designs. Firstly, steel rebars allow architects to design structures with larger spans and heights, as they provide the necessary load-bearing capacity. This is particularly important in complex designs that involve cantilevers, soaring roofs, or suspended floors, as the rebars distribute the loads evenly and prevent structural failure. Moreover, steel rebars enhance the constructability of complex architectural designs by enabling the creation of slender and lightweight structures. Since rebars are strong and durable, they can be used to reinforce thin concrete elements, reducing the overall weight of the structure. This not only enhances the aesthetic appeal of the design but also minimizes the amount of material required, resulting in cost savings during construction. In addition, steel rebars offer flexibility during the construction process. They can be easily bent and shaped to match the intricate geometries and curves of complex architectural designs. This allows architects to realize their creative vision by incorporating unique and eye-catching elements into the structure. Furthermore, steel rebars contribute to the durability and longevity of complex architectural designs. By reinforcing the concrete, they increase its resistance to cracking, bending, and corrosion. This is especially important in areas prone to seismic activity or harsh weather conditions. The use of rebars ensures that the structure can withstand these challenges and remain intact over time. Overall, steel rebars significantly impact the constructability of complex architectural designs. Their strength, versatility, and ability to reinforce concrete elements make it possible to create innovative structures that are both visually appealing and structurally sound. Without the support of steel rebars, the construction of such complex designs would be much more challenging, if not impossible.

Q: What is the standard length of steel rebars?: The length of steel rebars commonly differs according to the region and project specifications. In the United States, for instance, the standard length is typically 20 feet or 6.1 meters. Nevertheless, it is crucial to acknowledge that rebars can be tailored and adjusted to meet the required lengths for a specific construction project. Moreover, in certain countries or regions, rebars may come in various standard lengths as per local construction norms and regulations. Hence, it is imperative to refer to local codes and specifications for determining the appropriate standard length of steel rebars for a particular project.

Q: How are steel rebars installed in concrete slabs?: The process of reinforcing concrete slabs involves the installation of steel rebars. These rebars are placed in a specific pattern within the concrete slab to provide additional strength and support. To begin, the area where the concrete slab will be poured is prepared by excavating and leveling the ground. A layer of compacted gravel or crushed stone, known as the base, is then placed to create a stable foundation. Once the base is in place, the rebars are positioned within the slab according to the desired locations. Typically, they are arranged in a grid-like pattern, with horizontal rebars placed parallel to each other and vertical rebars placed perpendicular to the horizontal ones. The spacing and diameter of the rebars depend on the design requirements and load capacity. To ensure proper positioning, plastic bar supports or chairs are used to lift the rebars off the ground and hold them in place. Additionally, the rebars are tied together at the intersections using wire or metal ties to maintain their relative positions during the concrete pouring process. After the rebars are properly positioned, the concrete is poured over them. The concrete mixture is carefully spread evenly across the entire area of the slab, fully encasing the rebars. Vibrating tools may be utilized to eliminate air bubbles and consolidate the concrete around the rebars. Once the concrete is poured, it is left to cure and harden. During this time, the rebars provide reinforcement, increasing the strength and load-bearing capacity of the slab. Once fully cured, the concrete slab with embedded rebars becomes a durable and structurally sound element capable of withstanding various loads and stresses. In conclusion, the installation of steel rebars in concrete slabs involves positioning them in a grid-like pattern and pouring the concrete over them. This reinforcing process enhances the strength and durability of the slab, making it suitable for a wide range of applications.

Q: Can steel rebars be used in high-temperature environments?: No, steel rebars should not be used in high-temperature environments as they can lose their strength and structural integrity due to thermal expansion and potential degradation.

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