ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR System 1

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 100000 m.t./month

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Product Description:

Appearance: Black

Technique: Slitting hot rolled steel coil

Grade: Q235, Q195,A36 SS400 S235jr.St37-2

Standard: AISI,GB,DIN,ASTM,EN,JIS

Length: 6m, 9m, 12m or as your requirement.

Width: 10mm-1010mm

Thickness: 1.5mm-20mm

Business type: big manufacture

Place of origin: Tianjin China (Mainland)

Packaging Details: In bundles for exporting and sea worthy

Delivery Detail: Within 15-35 days after receiving L/C or deposite T/T

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

General specification as below:

Flat Bar Specification
Width (mm)	Thickness (mm)	Length (m)	Theoretical Weight (kg/m)
20	2.0	6/9/12	0.31
20	2.5	6/9/12	0.39
20	2.75	6/9/12	0.43
25	2.5	6/9/12	0.49
25	3.75	6/9/12	0.74
30	2.5	6/9/12	0.59
30	3.5	6/9/12	0.82
30	9.75	6/9/12	2.30
40	3.5	6/9/12	1.10
40	4.75	6/9/12	1.50
40	11.75	6/9/12	3.69
50	2.75	6/9/12	1.08
50	4.5	6/9/12	1.77
50	9.75	6/9/12	3.83
60	5.5	6/9/12	2.60
60	7.5	6/9/12	3.53
60	11.5	6/9/12	5.42
80	5.5	6/9/12	3.45
80	7.5	6/9/12	4.71
80	11.75	6/9/12	7.38
100	3.25	6/9/12	2.55
100	4.75	6/9/12	3.73
100	7.5	6/9/12	5.89
120	9.75	6/9/12	9.18
120	11.75	6/9/12	11.07
150	9.75	6/9/12	11.48
150	11.5	6/9/12	13.54
150	13.5	6/9/12	15.90
160	11.75	6/9/12	14.76
200	9.5	6/9/12	14.92
250	5.75	6/9/12	11.28
340	7.75	6/9/12	20.68

Products Advantages

1. high quality competitive price and Accurate in size

2. high dimensional accuracy

3. Guaranteed raw material

4.high utilization rate of material

5.convenient in construction, saving much time and labor

6. high mechanical strength

Application: Widely used for construction, Ship building, Machinery manufacturing ,steel structure,agriculture and steel grating.

Q: Can steel rebars be bent without breaking?: Yes, steel rebars can be bent without breaking. Steel rebars are made from a strong and durable material called steel, which has excellent flexibility and tensile strength. This means that steel rebars can withstand significant bending forces without breaking or fracturing. However, it is important to note that there are limits to how much a steel rebar can be bent without causing damage. If excessive force is applied or if the rebar is bent beyond its maximum bending capacity, it may eventually break. Therefore, it is crucial to follow industry guidelines and specifications when bending steel rebars to ensure their integrity and structural performance.

Q: What is the effect of steel rebars on the formwork design?: The formwork design in construction projects is significantly impacted by steel rebars. These reinforcement bars, also known as rebars, play a crucial role in providing strength and stability to concrete structures. One important aspect influenced by steel rebars in formwork design is the proper positioning and spacing of the rebars within the formwork. To ensure the structural integrity of the concrete element, the formwork must be designed to accommodate the rebars and allow for their correct placement. This may involve creating openings or recesses in the formwork to facilitate the passage of the rebars. The presence of steel rebars also affects the size and dimensions of the formwork. As the rebars occupy space within the concrete element, the formwork needs to be adjusted accordingly to accommodate these additional materials. This may require increasing the size or thickness of the formwork to provide the desired concrete cover over the rebars. Another factor influenced by steel rebars in formwork design is the consideration of the weight and load-bearing capacity of the formwork system. The addition of steel rebars significantly increases the weight of the concrete structure, necessitating the design of formwork that can withstand this additional load. This may involve using stronger and more durable materials for the formwork and ensuring proper bracing and support. Furthermore, the presence of steel rebars can impact the formwork construction process. The formwork design must carefully consider the installation and removal of the rebars without compromising the integrity of the formwork system. This may involve incorporating removable sections or panels in the formwork design to facilitate the placement and removal of the rebars. In conclusion, steel rebars have a profound impact on formwork design in construction projects. Proper consideration and planning are necessary to ensure the correct positioning, spacing, and support of rebars within the formwork. The presence of rebars also affects the size, dimensions, weight, and construction process of the formwork system. Overall, the successful construction of durable and structurally sound concrete elements relies on the proper integration of steel rebars within the formwork design.

Q: What are the different types of steel rebars used in road construction?: There are typically two types of steel rebars used in road construction: plain steel bars and deformed steel bars. Plain steel bars are smooth and have no ridges or deformations. Deformed steel bars, on the other hand, have ridges, protrusions, or other patterns on their surface to improve the bond strength between the rebar and the surrounding concrete. Both types of rebars are commonly used in road construction to reinforce and strengthen the concrete structures.

Q: What are the different types of steel used in the production of rebars?: The production of rebars involves the use of different types of steel. The selection of steel depends on factors like desired strength, corrosion resistance, and cost. 1. The most commonly used steel in rebars is mild steel. It has a low carbon content and is relatively affordable. Mild steel rebars are suitable for general construction purposes that do not require high strength. 2. High Strength Deformed Bars (HSD) are made from carbon steel with higher yield and tensile strength than mild steel. They are commonly used in reinforced concrete structures like bridges and high-rise buildings that require higher load-bearing capacity. 3. Carbon steel rebars are made by alloying steel with carbon, which enhances their strength and durability. They are often used in construction projects that require resistance to extreme temperatures and high tensile strength. 4. Stainless steel rebars have a high chromium content, providing excellent corrosion resistance. They are commonly used in coastal areas or structures exposed to high humidity to prevent rusting and maintain structural integrity. 5. Epoxy-coated rebars have a protective coating of epoxy resin, which adds an extra layer of corrosion resistance. They are suitable for structures exposed to harsh environmental conditions or chemicals. 6. Galvanized rebars are coated with zinc for superior corrosion protection. They are commonly used in high humidity areas where corrosion is a significant concern. 7. Alloy steel rebars are made by adding elements like manganese, nickel, or chromium to enhance their mechanical properties. They offer increased strength, improved ductility, and resistance to fatigue, making them suitable for specialized applications like seismic zones or heavy construction. Selecting the appropriate type of steel rebar is crucial for ensuring the durability, safety, and longevity of the structure in a construction project.

Q: How do steel rebars affect the thermal conductivity of a structure?: Steel rebars can significantly affect the thermal conductivity of a structure. The thermal conductivity of steel is much higher than that of other construction materials such as concrete. When steel rebars are embedded within concrete structures, they create a path for heat to flow more easily through the structure. This increased thermal conductivity can have both positive and negative effects. On the positive side, the presence of steel rebars allows for efficient transfer of heat, which can be beneficial in certain applications. For example, in structures that require heating or cooling, such as buildings with HVAC systems, the steel rebars can assist in distributing the desired temperature more evenly throughout the structure. However, the increased thermal conductivity can also have negative consequences. In buildings where thermal insulation is crucial, such as those in extreme climates, the presence of steel rebars can lead to higher heat loss or gain. This can result in increased energy consumption and higher heating or cooling costs. To mitigate these negative effects, various insulation techniques can be applied to reduce the heat transfer through the steel rebars. One common practice is to add insulation layers around the rebars or to use materials with lower thermal conductivity for the concrete mix. These measures help to minimize the impact of the steel rebars on the overall thermal conductivity of the structure. In summary, steel rebars have a significant influence on the thermal conductivity of a structure. While they can enhance heat distribution in some cases, they can also contribute to increased energy consumption and heat loss. Proper insulation techniques should be implemented to minimize these negative effects and optimize the thermal performance of the structure.

Q: What is the role of steel rebars in the construction of retaining walls?: Steel rebars play a crucial role in the construction of retaining walls as they provide reinforcement and strength to the wall structure. They are embedded within the concrete to enhance its tensile strength and prevent cracking or collapsing under pressure. The rebars distribute the load evenly and help the retaining wall resist the lateral forces exerted by the soil or water behind it, ensuring stability and durability of the structure.

Q: How do steel rebars affect the overall durability of concrete?: Steel rebars have a significant impact on the overall durability of concrete structures. The presence of steel rebars in concrete enhances its strength and resistance to various external forces and environmental conditions. One of the primary functions of steel rebars is to provide tensile strength to concrete, which is otherwise weak in resisting tension. Concrete is excellent in compression but tends to crack under tension. By embedding steel rebars within the concrete, these cracks are effectively controlled and prevented from expanding, thus improving the durability of the structure. Steel rebars also help in increasing the flexural strength of concrete, making it more capable of withstanding bending and deformations. This is particularly crucial in structures such as beams, columns, and slabs that experience significant loads and forces during their lifespan. Moreover, steel rebars act as a reinforcement in concrete, improving its resistance to external factors such as earthquakes, wind, and impact loads. The presence of rebars helps in distributing and dissipating these forces throughout the structure, reducing the chances of structural failure and increasing the overall durability. Another critical aspect is the prevention of corrosion in reinforced concrete structures. The steel rebars are typically coated with materials that protect them from corrosion caused by moisture and chemical reactions. This protective coating, coupled with the alkaline environment of concrete, creates a barrier that significantly slows down the corrosion process, thereby increasing the longevity and durability of the concrete structure. In conclusion, steel rebars play a vital role in enhancing the overall durability of concrete structures. They provide the necessary tensile strength, improve flexural strength, enhance resistance to external forces, and prevent corrosion. By incorporating steel rebars, concrete becomes more robust, long-lasting, and capable of withstanding various challenges, ensuring the longevity and safety of the structure.

Q: Can steel rebars be used in corrosive chemical environments?: Steel rebars can be used in corrosive chemical environments, but their performance and durability may be compromised. Steel is susceptible to corrosion when exposed to certain chemicals, especially those that are acidic or contain chlorides. In such corrosive environments, the rebars can undergo corrosion, leading to structural damage and reduced load-bearing capacity. To mitigate the corrosion risk, various measures can be taken. One common approach is to coat the rebars with a protective layer, such as epoxy or zinc coating, to create a barrier between the steel and the corrosive environment. Additionally, using stainless steel rebars or other corrosion-resistant alloys can provide better resistance against chemical corrosion. It is crucial to consider the specific chemicals present in the environment and consult with corrosion engineers and experts to determine the appropriate measures for using steel rebars in corrosive chemical environments. Proper maintenance and regular inspections are also necessary to monitor any signs of corrosion and take prompt corrective action to ensure the structural integrity and safety of the reinforced concrete structures.

Q: What is the process of cutting steel rebars on-site?: The process of cutting steel rebars on-site involves several steps to ensure accurate and precise cuts. Here is a general outline of the process: 1. Measurement and Marking: First, the length required for the steel rebar is measured using a tape measure or other measuring tools. Once the desired length is determined, it is marked on the rebar using a chalk line or a permanent marker. 2. Safety Measures: Before proceeding with the cutting process, it is crucial to ensure safety. Workers should wear appropriate personal protective equipment (PPE), including gloves, safety glasses, and steel-toe boots. Additionally, the work area should be clear of any obstructions or hazards. 3. Set Up the Cutting Tools: There are various tools available for cutting steel rebars on-site, such as an angle grinder with a cutting disc, a reciprocating saw with a metal-cutting blade, or a rebar cutter. The chosen tool should be set up and secured according to the manufacturer's instructions. 4. Cutting the Rebar: Once the cutting tool is ready, the marked section of the rebar is positioned securely on a stable surface. The cutting tool is then carefully guided along the marked line, applying consistent pressure to achieve a clean and precise cut. It is essential to maintain control of the cutting tool throughout the process to avoid any accidents. 5. Inspecting the Cut: After the cut is made, it is important to inspect the quality of the cut. The cut end should be smooth and free from any burrs or rough edges. If necessary, a file or a grinding tool can be used to smooth out any imperfections. 6. Handling and Disposing: Once the steel rebar is cut to the desired length, it can be safely handled and used for its intended purpose. Any leftover pieces or scraps should be appropriately disposed of, following local regulations for metal waste disposal. It is crucial to note that the exact process and tools used for cutting steel rebars on-site may vary depending on the specific requirements, available equipment, and safety protocols of the construction site. It is always recommended to follow the manufacturer's instructions and consult with professionals when carrying out such tasks.

Q: How are steel rebars anchored into concrete?: Steel rebars are anchored into concrete using various methods to ensure that they are securely fixed in place. One common method is by using mechanical anchors, such as anchor bolts or anchor plates. These mechanical anchors are inserted into the concrete before it sets, and the rebars are then attached to them using nuts, washers, or other fastening devices. This method provides a strong and reliable connection between the rebars and the concrete. Another method used for anchoring rebars into concrete is by using epoxy or adhesive anchors. In this method, a special epoxy or adhesive is applied to the rebars and then inserted into pre-drilled holes in the concrete. The epoxy or adhesive hardens and creates a strong bond between the rebars and the concrete, ensuring that they are securely anchored. Additionally, rebars can also be anchored into concrete by using mechanical couplers. These couplers are used to connect two rebars together, creating a continuous reinforcement. The couplers are installed by threading the rebars into the coupler and then tightening them together using wrenches or other tools. This method provides a seamless connection between the rebars and eliminates the need for overlapping or lapping of rebars, saving time and material. Overall, the anchoring of steel rebars into concrete is a crucial step in the construction process. It ensures that the rebars provide the necessary reinforcement and structural integrity to the concrete structure. The choice of anchoring method depends on various factors such as the specific requirements of the project, the load capacity needed, and the design specifications.

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