ASTM deformed steel bar for construction

ASTM deformed steel bar for construction System 1

ASTM deformed steel bar for construction System 2

ASTM 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:: 10000 m.t./month

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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

Deformed Steel Bar in container

Deformed Steel Bar in factory

Note:

1. Our products are produced according to national standard (GB), if not, supply according to national standards (GB) or agreement as customer required.

2. Other Grade and Standard Deformed Steel Bar we can supply:

Grade: GR40/GR60, G460B/B500A/B500B/B500C,BST500S

Standard: ASTM, BS, DIN

The Minimum Order Quantity of these products is high, and need to be confirmed.

3. We can not only supply Deformed Steel Bar; if you need anything about building materials, please contact us for further information.

4. Please send us your detail specifications when inquire. We will reply to you as soon as possible. We sincerely hope we can establish a long stable business relationship.

ASTM deformed steel bar for construction

Q: What are the guidelines for splicing steel rebars in concrete?: The guidelines for splicing steel rebars in concrete typically include ensuring proper bar alignment, using appropriate splice connectors, maintaining minimum splice length, and following the recommended lap splice lengths based on bar diameter and reinforcement design requirements. Other factors such as bar placement and spacing, concrete cover, and the use of mechanical or welded splices may also be considered depending on the specific project and local building codes.

Q: What is the maximum spacing allowed between vertical steel rebars in columns?: The maximum spacing allowed between vertical steel rebars in columns depends on various factors such as the column size, design requirements, and local building codes. However, a common guideline is to keep the spacing between rebars equal to or less than three times the column diameter or width.

Q: Are steel rebars suitable for use in structures with high resistance to impact?: Steel rebars are generally suitable for use in structures with high resistance to impact. Rebars, also known as reinforcement bars, are made from steel and are commonly used in concrete structures to enhance their strength and durability. Steel is known for its high tensile strength and ability to absorb and distribute impact forces, making it an ideal material for reinforcement. In structures that are prone to impact, such as bridges, highways, or buildings located in earthquake-prone areas, steel rebars play a critical role in providing additional strength and resistance. The use of rebars ensures that the structure can withstand sudden impact loads and prevent catastrophic failures. Moreover, steel rebars are available in various grades and sizes, allowing engineers to select the appropriate type of rebar based on the specific requirements of the structure. Higher grade rebars, such as Grade 60 or Grade 75, offer increased strength and ductility, making them even more suitable for structures with high resistance to impact. It is important to note that while steel rebars enhance the overall strength and impact resistance of a structure, other factors such as design, construction techniques, and maintenance also play vital roles in ensuring the structure's ability to withstand impact forces. Therefore, a comprehensive approach that considers all these factors is essential in designing and constructing structures with high resistance to impact.

Q: Do steel rebars need to be coated with any protective materials?: Yes, steel rebars often require a protective coating to prevent corrosion and extend their lifespan. Coatings such as epoxy, zinc, or galvanized coatings are commonly used to protect rebars from environmental factors and ensure their structural integrity in reinforced concrete structures.

Q: What are the common defects or issues associated with steel rebars?: Steel rebars can encounter various defects or issues, including the following: 1. Rust: When exposed to moisture or corrosive substances, steel rebars are prone to rusting. This rust weakens their load-bearing capacity and compromises the structural integrity of the reinforced concrete. 2. Poor bonding with concrete: Inadequate cleaning or the presence of rust can prevent rebars from bonding well with the concrete. This can result in reduced strength and durability of the reinforced concrete structure. 3. Incorrect size or shape: Structural problems can arise from rebars that are improperly sized or shaped. For instance, rebars that are too short or have insufficient coverage might not provide enough reinforcement, making the structure susceptible to cracking or collapse. 4. Improper placement: Weak points in the reinforced concrete can occur due to incorrect rebar placement. This can happen when rebars are not adequately spaced, aligned, or when there are gaps between the rebar and the concrete. 5. Inappropriate storage and handling: To prevent rust, it is crucial to store rebars in a dry and well-ventilated area. Improper storage or handling can lead to surface damage, bending, or twisting of the rebars, affecting their performance in reinforced concrete. 6. Welding defects: Welded rebars may have defects such as insufficient fusion, cracks, or lack of penetration. These defects can compromise the strength and integrity of the reinforcement. 7. Overlapping issues: Overlapping rebars is a common practice to ensure reinforcement continuity. However, improper overlapping, such as insufficient overlap length or inadequate lapping of rebars, can result in weak joints and reduced structural strength. 8. Quality control concerns: Defects or issues in rebars can arise from inadequate quality control during manufacturing or installation. This can encompass problems like improper chemical composition, inadequate strength, or deviations from specified standards. Addressing and rectifying these defects or issues during the design, manufacturing, and construction stages is crucial to ensure the safe and reliable performance of reinforced concrete structures. Regular inspection, maintenance, and adherence to industry standards and guidelines are essential in mitigating these common issues associated with steel rebars.

Q: What is the ductility of steel rebars?: The ductility of steel rebars refers to their ability to deform and stretch without breaking during tension or bending. Steel rebars are known for their excellent ductility, which allows them to absorb and dissipate energy when subjected to high loads or seismic forces. This property is essential in construction, as it ensures that the rebars can withstand extreme conditions and maintain structural integrity. The ductility of steel rebars also makes them suitable for various applications, such as reinforcing concrete structures and providing support in buildings, bridges, and other infrastructure projects.

Q: What is the role of steel rebars in minimizing cracking due to shrinkage?: The role of steel rebars in minimizing cracking due to shrinkage is to provide reinforcement and strength to concrete structures. By placing steel rebars within the concrete, they act as a framework that helps distribute the tensile forces caused by shrinkage. This prevents the concrete from cracking and ensures the overall stability and durability of the structure.

Q: Can steel rebars be used in architectural or decorative concrete applications?: Yes, steel rebars can be used in architectural or decorative concrete applications. They provide structural reinforcement and enhance the overall strength and durability of the concrete. Additionally, when properly designed and installed, steel rebars can be concealed or incorporated into the design, making them suitable for various aesthetic purposes in architectural or decorative concrete projects.

Q: Can steel rebars be used in foundation systems?: Yes, steel rebars can be used in foundation systems. Steel rebars are commonly used as reinforcement in concrete foundations to provide additional strength and stability. They help to distribute the load evenly and prevent cracking or failure of the foundation.

Q: How do steel rebars affect the overall creep and shrinkage of concrete structures?: Steel rebars have a significant influence on the overall creep and shrinkage of concrete structures. The presence of rebars helps to control and minimize the shrinkage of concrete by providing restraint and reducing the amount of drying shrinkage. Additionally, rebars contribute to the overall stiffness of the structure, decreasing the potential for creep deformation over time. Therefore, steel rebars play a crucial role in mitigating both creep and shrinkage in concrete structures, ensuring their stability and durability.

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