China supplier Metallic material steel rebar

China supplier Metallic material steel rebar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 1000 m.t.

Supply Capability:: 17497 m.t./month

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HIGH QUALITY DIN STANDARD HOT ROLLED STEEL REBAR

Specification

Standard:

AISI

Technique:

Hot Rolled

Shape:

Round

Surface Treatment:

Dry

Steel Grade:

Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400

Certification:

ISO,CE

Thickness:

6-40mm

Length:

6M/12M

Net Weight:

1.5-2mt

Rebar has ridges that bind it mechanically to the concrete with friction, it can still be pulled out of the concrete

under high stresses, an occurrence that often precedes a larger-scale collapse of the structure. To prevent such

a failure, rebar is either deeply embedded into adjacent structural members, or bent and hooked at the ends to lock

it around the concrete and other rebars. This first approach increases the friction locking the bar into place while the

second makes use of the high compressive strength of concrete.

Rebar is common steel reinforcing bar, an important component of reinforced concrete and reinforced masonry structures.

It is usually formed from mild steel, and is given ridges for better frictional adhesion to the concrete

Product Description :

Chemical composition (%):	Steel		C		Si	Mn		P	S		Ceq
	HRB335		0.25		0.80	1.60		0.045	0.045		0.52
	HRB400										0.54
	HRB500										0.55
Mechanical properties	Steel	Rel/ MPa		Rm/ MPa			A/ %			Agt/ %
		≥
	HRB335	335		455			17			7.5
	HRB400	400		540			16
	HRB500	500		630			15
Package:	Standard export packing or as customer's request
Application:	Construction, building, bridge, road. ect
Payment terms	1).100% irrevocable L/C at sight. 2).30% T/T prepaid and the balance against the copy of B/L. 3).30% T/T prepaid and the balance against L/C
Delivery time	15-30 days after receipt of L/C or deposit by T/T

China supplier Metallic material steel rebar

Features

1、Pure steel quality, stable chemical contents, small tolerance.
2、Constant Quality, good drawing performance.
3、High dimension accuracy degree, accuracy degree of Level C up to 80%, smooth surface, less scale, easy to be pickled.
4、Automatic bundling with 4 lines by Machine in tidy and good looks
5、Big high quality percentage, small coil percentage, and heavy coil weight for Hard Coil.
6、High sorbitizing percentage.

Packing:

In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.

China supplier Metallic material steel rebar

FAQ:

1.Q: What's your MOQ(minimum order quantity)?

A: One full container, mixed acceptable .

2. Q: What's your packing methods?

A: Packed in bundle or bulk ..

3. Q: How can I buy CNBM products in my country?

A:Please send us an inquiry or email ,we will reply to you if there is distributor in your country

4. Q: Can we visit your factory?

A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.

5. Q: How long does it take to get the product if i place an order?

A:With the process of your requirements,we will pack and deliver in 3-7 days. If it is by sea shipment,it will take 15-45 days depending on different locations

Q: How do steel rebars affect the load-bearing capacity of concrete structures?: Steel rebars significantly enhance the load-bearing capacity of concrete structures by providing tensile strength to resist cracks and prevent failure under heavy loads. The incorporation of rebars in concrete increases its overall structural integrity, allowing it to withstand greater stress and support larger loads without compromising its stability.

Q: Can steel rebars be used in non-structural applications?: Yes, steel rebars can be used in non-structural applications. While rebars are primarily used to reinforce concrete structures, they can also be utilized in non-structural applications where additional strength or support is desired. These applications include garden stakes, fence posts, trellises, and other similar uses. The high tensile strength of steel rebars makes them suitable for these non-structural applications, as they can provide increased stability and durability. However, it is important to note that the sizing and specifications of rebars used for non-structural applications may differ from those used in structural applications.

Q: Can steel rebars be used in underground construction or tunnels?: Yes, steel rebars can be used in underground construction or tunnels. Steel rebars are commonly used in these applications to provide strength and reinforcement to concrete structures, ensuring their stability and durability in challenging underground environments.

Q: How do steel rebars affect the overall crack control of concrete?: The incorporation of steel rebars into concrete structures is crucial for crack control. Steel rebars significantly improve the otherwise low tensile strength of concrete. Tensile forces, such as drying shrinkage, temperature changes, or applied loads, tend to cause cracks in concrete. However, the presence of steel rebars helps mitigate and control these cracks. Rebars reinforce the concrete and provide additional strength. They resist tensile forces and prevent easy cracking of the concrete. When reinforced concrete is subjected to tensile forces, the rebars bear a significant portion of the load, reducing the stress on the concrete and minimizing crack formation. The bond between the steel rebars and the concrete is essential for crack control. This bond ensures effective transfer of tensile forces to the concrete, enhancing its overall crack resistance. Additionally, the bond helps distribute applied loads evenly, reducing the risk of localized cracking. Steel rebars also have the ability to control crack widths in concrete. By specifying the appropriate diameter, spacing, and arrangement of the rebars, engineers can influence crack widths to meet design requirements. The rebars act as barriers, limiting the width of cracks and maintaining the structural integrity of the concrete. In conclusion, steel rebars have a positive impact on crack control in concrete. They enhance the tensile strength, resist tensile forces, distribute loads, and limit crack widths. Incorporating steel rebars in concrete ensures durability and longevity of structures by effectively controlling crack formation and minimizing their negative consequences.

Q: What are the common quality issues found in steel rebars?: Some common quality issues found in steel rebars include insufficient strength or hardness, improper dimensions or shape, surface defects such as cracks or rust, and inadequate corrosion resistance. Other issues may include improper labeling or marking, poor welding or bonding properties, and inconsistent mechanical properties throughout the rebar.

Q: What are the international standards for steel rebars?: Various organizations and bodies, such as the International Organization for Standardization (ISO), the American Society for Testing and Materials (ASTM), and the European Committee for Standardization (CEN), set the international standards for steel rebars. ISO establishes standards for steel rebars through ISO 15630, which covers both hot-rolled and cold-worked rebars. This standard outlines the requirements for the chemical composition, mechanical properties, dimensions, and tolerances of rebars used in reinforced concrete structures. ASTM has developed multiple standards for steel rebars, such as ASTM A615/A615M and ASTM A706/A706M. ASTM A615/A615M focuses on deformed and plain carbon-steel rebars for concrete reinforcement, specifying the chemical composition, mechanical properties, dimensions, and marking requirements. On the other hand, ASTM A706/A706M concentrates on low-alloy steel rebars with improved weldability, suitable for concrete structures that require welding. In Europe, CEN has established the primary standard for steel rebars as the Eurocode 2 (EN 1992-1-1). This code provides design rules for the structural use of concrete and includes guidelines for the selection and utilization of rebars. Additionally, CEN has also developed EN 10080, which specifies the requirements for steel rebars used in concrete reinforcement, covering chemical composition, mechanical properties, dimensions, and tolerances. These international standards guarantee the quality and consistency of steel rebars utilized in construction projects worldwide. Complying with these standards helps ensure the safety and reliability of reinforced concrete structures by providing guidelines for material properties, manufacturing processes, and quality control measures.

Q: What is the composition of steel rebars?: Steel rebars, also referred to as reinforcing bars or reinforced steel bars, are extensively utilized in construction projects for the purpose of reinforcing and providing strength to concrete structures. The construction of steel rebars predominantly relies on iron as the main constituent. In combination with carbon, iron forms the steel utilized in the rebars. Typically, the carbon content in rebars ranges from 0.2% to 0.3% by weight. This carbon content effectively enhances the steel's hardness and strength, making it suitable for reinforcing concrete structures. Alongside iron and carbon, steel rebars can contain trace amounts of other alloying elements such as manganese, silicon, and sulfur. These elements are deliberately added in controlled quantities to improve specific properties of the steel, including durability, resistance to corrosion, and weldability. Furthermore, to augment the bond between the rebar and the surrounding concrete, steel rebars are often manufactured with a ribbed or deformed surface. These surface deformations create a mechanical interlock, ultimately boosting the overall strength and stability of the reinforced structure. It is noteworthy that the precise composition of steel rebars may differ based on the specific grade or standard being followed. Different countries and organizations have their own specifications for steel rebars, which stipulate the allowable range of alloying elements and other parameters. In summary, the composition of steel rebars primarily consists of iron, carbon, and small amounts of other alloying elements. The specific details of the composition vary depending on the grade and standard being adhered to.

Q: What is the role of steel rebars in minimizing creep deformation in concrete?: Steel rebars play a crucial role in minimizing creep deformation in concrete structures. Creep deformation refers to the gradual and permanent deformation that occurs in concrete over time under sustained loads. This phenomenon can lead to structural instability and compromise the overall integrity of the concrete. Steel rebars, also known as reinforcement bars, are embedded within the concrete matrix to provide additional strength and stiffness. These rebars help counteract the tensile forces exerted on the concrete, as concrete is weak in tension but strong in compression. By resisting the tensile stresses, the rebars prevent the concrete from cracking and experiencing excessive creep deformation. The presence of steel rebars in concrete also improves the load-carrying capacity of the structure, allowing it to bear heavier loads without excessive deformation. This is achieved by distributing the applied load more evenly throughout the concrete, reducing localized stress concentrations and minimizing the potential for creep deformation. Furthermore, steel rebars act as a restraining element, limiting the movement of the concrete and reducing the potential for creep. The high modulus of elasticity and low thermal expansion coefficient of steel make it an ideal material for reinforcing concrete and restraining its creep behavior. In summary, the role of steel rebars in minimizing creep deformation in concrete is multi-fold. They provide additional strength and stiffness to counteract tensile forces, improve load-carrying capacity, and act as a restraining element, all of which contribute to maintaining the structural integrity of the concrete over time.

Q: Can steel rebars be used in sustainable construction practices?: Yes, steel rebars can be used in sustainable construction practices. They are commonly used in reinforced concrete structures, which have a long lifespan and can be recycled at the end of their life. Additionally, steel rebars can contribute to the overall strength and durability of a building, reducing maintenance and replacement needs. Furthermore, using steel rebars can enhance the energy efficiency of a structure by providing thermal mass, which helps in reducing heating and cooling requirements.

Q: What are the safety precautions when handling steel rebars?: To minimize the risk of accidents or injuries when handling steel rebars, it is crucial to adhere to several safety precautions. These precautions encompass: 1. Personal Protective Equipment (PPE): When handling steel rebars, it is essential to wear appropriate PPE. This includes steel-toe boots, gloves, safety glasses, and a hard hat. PPE serves as a protective measure against potential hazards like falling rebars or flying debris. 2. Lifting and Carrying Techniques: Due to their weight and difficulty in handling, steel rebars require the use of proper lifting techniques to prevent strain or injury. Instead of bending at the waist, individuals should bend at the knees and utilize their leg muscles to lift the rebar. Furthermore, avoiding overexertion and seeking assistance when handling heavy rebars is crucial. 3. Proper Storage: To prevent rebars from falling or rolling, it is necessary to store them securely and in an organized manner. Rebars should be stacked flat and not leaned against walls or other structures. Additionally, storing rebars away from high traffic areas helps avoid accidental collisions. 4. Sharp Edges: The sharp edges of steel rebars can cause cuts or puncture wounds. Therefore, handling rebars with caution and wearing gloves to protect the hands is vital. Moreover, storing and transporting rebars in a manner that minimizes the risk of contact with sharp edges is necessary. 5. Communication and Warning Signs: Communication with coworkers and the provision of warnings regarding potential hazards or activities involving rebars are important when working with steel rebars. Posting clear signage in work areas to alert others to the presence of rebars and the need for caution is also crucial. 6. Training and Supervision: Workers should receive adequate training on the safe handling and storage of steel rebars. Supervisors should closely monitor work areas to ensure adherence to safety protocols and provide guidance or corrective action as required. By adhering to these safety precautions, the risk of accidents or injuries when handling steel rebars can be significantly reduced. Prioritizing safety at all times is essential to establish a secure working environment.

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