Deformed Steel Bar Hot Rolled HRB4000 HRB500 ASTM A615 GR40/GR60

Deformed Steel Bar Hot Rolled HRB4000 HRB500 ASTM A615 GR40/GR60 System 1

Deformed Steel Bar Hot Rolled HRB4000 HRB500 ASTM A615 GR40/GR60 System 2

Deformed Steel Bar Hot Rolled HRB4000 HRB500 ASTM A615 GR40/GR60 System 3

Deformed Steel Bar Hot Rolled HRB4000 HRB500 ASTM A615 GR40/GR60

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 500 m.t.

Supply Capability:: 30000 m.t./month

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Product Description:

Specifications of HRB500 Deformed Steel Bar:

Standard	GB	HRB500
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Payment term	TT or L/C
Application	mainly used in construction industry to reinforce concrete structures and so on
Quality	First quality, the goods are from Chinese big manufacturers.
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
HRB500	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045		0.08-0.12
	Physical capability
	Yield Strength (N/cm²)		Tensile Strength (N/cm²)			Elongation (%)
	≥500		≥630			≥12

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 HRB500 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..

Product Description:

Quick Details

Standard:ASTM, BS, GB, JIS
Grade:HRB335
Diameter:6-50mm
Length:6-12m
Place of Origin:Tianjin, China (Mainland)
Application:construction
Deformed Steel Bar:Original Tianjin China
Standard1:BS4449
Standard2:ASTM A615
Standard3:GB/T1449
Grade1:HRB335
Grade2:HRB400
Grade3:HRB500
Grade4:460B
Grade5:GR.40
Grade6:GR.60

Packaging & Delivery

Packaging Details:	with bundle and bare packing
Delivery Detail:	within 15-20days

Specifications

Deformed Steel Bar
1).Standard:BS4449 ASTM A 615
2).Grade:HRB335/400/500,460B,GR40/60
3) Experience : 5years for exporting

Tianjin Baolf Steel Co.,Limited
Standard	BS4449 ASTM A615 GB/T1499
Grade	HRB335/400/500,460B,GR40/60
Diameter	6-50mm
Length	6,9,12m
Technique	Hot Rolled
Application	For Construction

Q: What are the precautions to be taken while welding steel rebars?: When welding steel rebars, there are several precautions that need to be taken. First and foremost, it is crucial to wear appropriate personal protective equipment such as a welding helmet, gloves, and a protective apron to shield against sparks, heat, and UV radiation. Additionally, proper ventilation in the work area is necessary to prevent the accumulation of harmful fumes and gases. It is important to ensure that the rebar is clean and free from any contaminants or coatings that could affect the quality of the weld. Welding should only be performed by trained and qualified individuals who understand the specific techniques and settings required for welding rebars. Finally, regular inspections of the welds should be conducted to ensure their integrity and strength.

Q: What are the common defects observed in steel rebars?: Steel rebars can exhibit several common defects, including rust and corrosion, cracks and fractures, lack of bond, bent or deformed shapes, dimensional inaccuracies, and inclusions or impurities. When exposed to moisture and oxygen, rebars are susceptible to rust and corrosion, which weaken their structural integrity and compromise the overall strength of concrete structures. Various factors such as excessive bending, improper handling during transportation and installation, or overloading can lead to cracks and fractures in rebars, reducing their load-bearing capacity and affecting the performance of concrete structures. Adequate bond between rebars and the surrounding concrete is crucial for effective load transfer, but poor surface preparation, improper placement, or the presence of contaminants can result in a lack of bond and reduced structural strength. Improper bending techniques, excessive bending, or mishandling can result in rebars with incorrect shapes or deformities, compromising their structural integrity and load-bearing capacity. Steel rebars must conform to specific dimensional tolerances to ensure proper fit and alignment within concrete structures, but manufacturing errors or improper storage and handling can cause dimensional inaccuracies, leading to difficulties during installation and potentially impacting structural performance. Ideally, steel rebars should be free from any inclusions or impurities that can weaken the material, but inadequate quality control during the manufacturing process can result in the presence of foreign materials or impurities, reducing the strength and durability of rebars. To minimize these defects and ensure the long-term structural integrity of concrete structures, it is important to implement proper quality control measures and adhere to industry standards during the manufacturing, transportation, and installation of steel rebars.

Q: What is the purpose of steel rebars in construction?: The purpose of steel rebars in construction is to provide reinforcement and strength to concrete structures, preventing cracking and ensuring stability.

Q: How are steel rebars bundled and tied together on construction sites?: Steel rebars are typically bundled together by placing them parallel to each other and tying them tightly with steel wire or plastic ties. This bundling ensures that the rebars remain in place and maintain their shape during transportation and installation on construction sites.

Q: Can steel rebars be cut to custom lengths?: Yes, steel rebars can be cut to custom lengths. Rebars are typically available in standard lengths, but they can be easily cut to fit specific project requirements. This can be done using various tools such as an angle grinder, cutting torch, or a hydraulic rebar cutter. It is important to use proper safety measures and techniques when cutting steel rebars to ensure accurate cuts and prevent any accidents or injuries.

Q: Can steel rebars be used in structures with high seismic activity?: Yes, steel rebars can be used in structures with high seismic activity. Steel rebars have high tensile strength and provide reinforcement to concrete structures, making them more resistant to seismic forces. They help to improve the overall structural integrity and ensure that the building can withstand the shaking and ground movements caused by earthquakes.

Q: What is the role of steel rebars in the construction of retaining walls?: The role of steel rebars in the construction of retaining walls is to provide reinforcement and strength to the structure. Steel rebars are embedded within the concrete walls to enhance their load-bearing capacity, resist tension forces, and prevent cracking or collapse. They help distribute the weight and pressure exerted by the retained soil, ensuring the stability and durability of the retaining wall over time.

Q: What is the composition of steel rebars?: Steel rebars, also known as reinforced steel bars or reinforcing bars, are commonly used in construction projects to provide strength and reinforcement to concrete structures. The composition of steel rebars typically consists of primarily iron, with varying amounts of carbon and other alloying elements. The main component of steel rebars is iron, which provides the base material for their construction. Iron is combined with carbon to form steel, and the carbon content in rebars is generally around 0.2-0.3% by weight. This carbon content helps enhance the strength and hardness of the steel, making it suitable for reinforcing concrete structures. In addition to iron and carbon, steel rebars may also contain small amounts of other alloying elements, such as manganese, silicon, and sulfur. These elements are added in controlled quantities to improve specific properties of the steel, such as its durability, corrosion resistance, and weldability. Moreover, steel rebars are often produced with a ribbed or deformed surface to enhance their bond with the surrounding concrete. These surface deformations create a mechanical interlock between the rebar and the concrete, increasing the overall strength and stability of the reinforced structure. It is important to note that the exact composition of steel rebars may vary depending on the specific grade or standard being followed. Different countries and organizations may have their own specifications for steel rebars, which can dictate the allowable range of alloying elements and other parameters. Overall, the composition of steel rebars primarily consists of iron, carbon, and small amounts of other alloying elements, with the specific details varying based on the grade and standard being used.

Q: What are the guidelines for repairing or replacing corroded steel rebars in existing structures?: The guidelines for repairing or replacing corroded steel rebars in existing structures typically involve the following steps: 1. Inspection: Thoroughly assess the extent of corrosion and determine the overall structural integrity of the rebars. 2. Cleaning: Remove loose rust, scale, and other contaminants from the rebars using suitable mechanical or chemical methods. 3. Surface preparation: Abrade the rebars to create a rough surface, ensuring proper adhesion of repair materials. 4. Repair options: Evaluate different repair methods such as patching, cathodic protection, or complete replacement, considering factors like the severity of corrosion, structural design, and cost-effectiveness. 5. Material selection: Choose appropriate repair materials such as epoxy-based coatings, corrosion inhibitors, or carbon fiber wraps based on the specific requirements and compatibility with the existing rebar and surrounding concrete. 6. Repair execution: Follow established industry practices, standards, and manufacturer's instructions while executing the repair work, ensuring proper application and curing of repair materials. 7. Quality control: Conduct regular inspections during and after the repair process to verify adherence to guidelines, assess the quality of workmanship, and ensure the long-term durability and safety of the repaired rebars. It is important to note that these guidelines may vary depending on local building codes, structural conditions, and the expertise of structural engineers or repair professionals involved. Therefore, it is recommended to consult with qualified professionals for specific guidelines tailored to the project at hand.

Q: What are the common quality tests performed on steel rebars?: Steel rebars undergo several common quality tests to guarantee their strength and durability, ensuring they meet the necessary standards and can withstand the intended load and environmental conditions. The tensile test is one of the most prevalent quality tests for steel rebars. This test determines the maximum amount of tensile stress the rebar can bear before breaking, providing insights into its tensile strength and ductility. Another significant quality test is the bend test, which involves bending a rebar at a specific angle without it breaking. This test evaluates the rebar's flexibility, resistance to cracking or fracturing, and is particularly crucial for construction projects requiring bending or shaping. Chemical composition analysis is conducted to determine the percentage of various elements present in the steel rebars, such as carbon, manganese, phosphorus, sulfur, among others. This analysis ensures that the rebars meet specific requirements and do not contain any impurities that could jeopardize their strength or corrosion resistance. Corrosion resistance is also a vital property for steel rebars, especially in high-moisture or chemically exposed environments. A corrosion test is performed by subjecting the rebars to corrosive environments like salt spray or acidic solutions, assessing their resistance to corrosion. This test helps determine the rebars' suitability for specific applications and prevents premature degradation. Lastly, dimensional tests are conducted to verify that the rebars meet required dimensions and tolerances. These tests involve measuring the rebars' length, diameter, and weight. Deviations from specified dimensions can impact the rebars' structural integrity and compatibility with other construction materials. In summary, quality tests for steel rebars include tensile testing, bend testing, chemical composition analysis, corrosion resistance testing, and dimensional testing. These tests are crucial in ensuring the strength, durability, and suitability of steel rebars for various construction applications.

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