GB STANDARD HIGH QUALITY HOT ROLLED REBAR

GB STANDARD HIGH QUALITY HOT ROLLED REBAR System 1

GB 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

GB 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 used in tunnels or underground transportation systems?: Yes, steel rebars can be used in tunnels or underground transportation systems. Steel rebars are commonly used in construction projects, including tunnels and underground transportation systems, due to their high tensile strength and durability. They provide reinforcement to concrete structures, enhancing their structural integrity and preventing cracking or collapsing. Steel rebars are resistant to corrosion, which is especially important in underground environments where moisture and other corrosive elements may be present. Additionally, steel rebars can be easily fabricated and installed, making them a practical choice for construction projects with tight schedules. Overall, steel rebars are a reliable and commonly used material in tunnels and underground transportation systems to ensure the safety and longevity of the structures.

Q:What is the process of calculating the required quantity of steel rebars for a project?: The process of calculating the required quantity of steel rebars for a project involves several steps. First, the engineer or designer identifies the structural elements that require reinforcement, such as beams, columns, or slabs. Next, they determine the design requirements, including the desired strength, size, and spacing of the rebars. This is typically done by referring to the project's structural drawings, codes, and specifications. Once the design requirements are known, the engineer uses mathematical formulas and calculations to determine the quantity of rebars needed. These calculations consider factors such as the dimensions of the structural elements, the load-bearing capacity required, and the specific steel reinforcement design. The engineer then takes into account any additional factors that may affect the quantity of rebars required, such as laps, overlaps, and wastage. They may also consider the practicality and availability of standard bar lengths to minimize cutting and wastage. Finally, the engineer prepares a detailed bill of quantities, which specifies the quantity, size, and type of rebars required for each structural element. This information is crucial for procurement and construction purposes, ensuring that the right amount of steel reinforcement is available for the project.

Q:How are steel rebars used in the construction of dams?: Steel rebars are used in the construction of dams to reinforce the concrete structure and provide additional strength and durability. They are typically placed within the concrete to resist tensile forces and prevent cracking or collapsing under the immense pressure of water. The rebars help to distribute the load evenly across the dam, increasing its overall stability and ensuring its long-term structural integrity.

Q:What is the elongation of steel rebars?: The elongation of steel rebars refers to the amount of deformation or stretching that a steel rebar can undergo before it fractures or breaks. It is a measure of the ductility or flexibility of the steel rebar. Elongation is typically expressed as a percentage of the original length of the rebar. The elongation of steel rebars varies depending on the grade or type of steel used and the manufacturing processes involved. Generally, steel rebars have a relatively high elongation compared to other construction materials such as concrete or timber. This makes them suitable for applications where flexibility and resistance to deformation are important, such as in reinforced concrete structures. The elongation of steel rebars is an important factor to consider in structural design and construction. It influences the ability of a rebar to withstand loads, especially in situations where the rebar is subjected to tension or bending forces. Higher elongation values indicate a greater ability of the rebar to stretch and deform without breaking, which improves the overall performance and safety of the structure. To ensure the proper selection and use of steel rebars, it is essential to consult the relevant standards and specifications provided by regulatory bodies and industry organizations. These guidelines provide specific requirements and recommendations for the elongation of steel rebars, as well as other mechanical properties, to ensure the structural integrity of construction projects.

Q:What is the maximum length of steel rebars available in the market?: The maximum length of steel rebars available in the market can vary, but commonly they are available in lengths up to 60 feet or 18 meters.

Q:How are steel rebars protected against chemical attacks in concrete?: Steel rebars are protected against chemical attacks in concrete through the use of protective measures such as applying corrosion-resistant coatings, using stainless steel or epoxy-coated rebars, and ensuring proper concrete cover thickness to prevent direct contact with aggressive substances.

Q:Can steel rebars be bent without compromising their strength?: Yes, steel rebars can be bent without compromising their strength. Steel rebars are designed to have a high tensile strength, which allows them to withstand bending and stretching forces without breaking or losing their structural integrity. The bending process involves applying a controlled amount of force to the rebar, which causes the material to deform and take on a new shape. However, it is important to ensure that the bending is done within the recommended limits and guidelines provided by the manufacturer or industry standards. Excessive bending beyond the specified limits can lead to microcracks or other defects that may compromise the strength of the rebar. Therefore, it is crucial to follow proper bending techniques and use the appropriate equipment to ensure that the steel rebars maintain their strength even after being bent.

Q:Are there any alternative materials to steel rebars for reinforcement?: Indeed, there exists a variety of alternative materials for reinforcement instead of steel rebars. One such material is FRP rebars, which consist of high-strength fibers like carbon, glass, or aramid embedded in a polymer matrix. These FRP rebars possess numerous advantages over steel rebars, such as a high strength-to-weight ratio, resistance to corrosion, and electromagnetic neutrality. They prove particularly valuable in situations where corrosion is a concern, such as marine environments or structures exposed to chemicals. Another alternative material is basalt rebars, which are formed by reinforcing basalt fiber with a polymer matrix. Similar to FRP rebars, basalt rebars offer advantages like a high strength-to-weight ratio and corrosion resistance. Additionally, they are non-conductive and non-magnetic, making them suitable for applications where electromagnetic neutrality is crucial, like in MRI facilities or near power lines. Besides FRP and basalt rebars, other alternative reinforcement materials include bamboo, timber, and composites made from natural fibers such as hemp or flax. These materials are commonly employed in sustainable construction practices or in regions where they are more easily accessible compared to traditional steel rebars. While they may not possess the same level of strength as steel, they can still provide adequate reinforcement for specific applications and offer other benefits like low environmental impact or ease of handling and installation. In conclusion, the availability of alternative materials to steel rebars provides engineers and architects with a range of options to select from based on their project's specific requirements, including factors such as strength, durability, cost, and sustainability.

Q:What is the impact of steel rebars on the overall sustainability of a building?: Steel rebars have a significant impact on the overall sustainability of a building. The use of steel rebars in construction enhances the structural integrity and longevity of a building, reducing the need for frequent repairs and replacements. This, in turn, contributes to the sustainable aspect of a building by minimizing resource consumption and waste generation. Moreover, steel is a highly recyclable material, allowing for a circular economy approach in construction. By incorporating steel rebars, buildings can achieve higher energy efficiency, reduced environmental footprint, and enhanced durability, thus positively impacting their overall sustainability.

Q:Why is the earthing device forbidden to use thread steel instead of round steel as lap steel bar?: H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words. Hot rolled ribbed bar is divided into two levels, HRB335 (old No. 20MnSi), three HRB400 (20MnSiV, 20MnSiNb, old No. 20Mnti), four grade HRB500 three grade.

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