Deformed bars in Grade HRB400 with High Quality

Deformed bars in Grade HRB400 with High Quality System 1

Deformed bars in Grade HRB400 with High Quality

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 100000 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

Q: Can steel rebars be prefabricated off-site?: Yes, steel rebars can be prefabricated off-site. Prefabrication involves the manufacturing of construction components in a controlled environment away from the construction site. Steel rebars, which are commonly used to reinforce concrete structures, can be fabricated off-site in a specialized facility. Prefabricating steel rebars off-site offers several advantages. Firstly, it allows for a more efficient and streamlined manufacturing process. In a controlled environment, the rebars can be produced with precision and accuracy, ensuring consistent quality. This can reduce the risk of errors and minimize wastage. Additionally, prefabricating steel rebars off-site can help save time on the construction site. Since the rebars are manufactured in advance, they can be delivered to the site ready for installation without the need for on-site fabrication. This can significantly speed up the construction process and improve overall project timelines. Moreover, prefabrication offers better safety conditions. By manufacturing the rebars off-site, workers are exposed to fewer on-site hazards, such as working at heights or in confined spaces. The controlled environment of a fabrication facility also allows for better quality control and compliance with safety regulations. Lastly, prefabrication can contribute to cost savings. The efficient production process, reduced on-site labor, and improved construction timelines can help lower overall project costs. Additionally, the controlled environment of a fabrication facility can result in better utilization of materials and decreased wastage. In summary, steel rebars can indeed be prefabricated off-site, offering numerous benefits such as improved quality, time savings, enhanced safety, and cost-effectiveness. This practice is commonly employed in construction projects to optimize efficiency and ensure the highest standards of construction.

Q: What's the difference between rebar and thread steel?: Physical and mechanical properties are different. Because of the different chemical composition and strength of reinforcing steel, they are different in physical and mechanical properties. The cold bending property of steel is good, can make the hook 180, screw steel can only make straight hook 90 degrees; steel weldability is good, with ordinary carbon steel electrode can be used to low alloy electrode; anti fatigue performance and toughness in steel bar is good.

Q: What are the guidelines for the proper storage of steel rebars on construction sites?: Ensuring the integrity and safety of steel rebars on construction sites is of utmost importance. To achieve this, the following recommendations should be followed: 1. It is crucial to select a suitable storage area for steel rebars. This entails choosing a flat, stable, and well-drained location, while avoiding areas that are prone to flooding or excessive moisture. 2. Ample space should be provided between rebars to prevent any contact or entanglement that could potentially cause damage. Additionally, clear aisles and pathways should be maintained to facilitate easy access and movement. 3. The protection of steel rebars against corrosion is essential. To achieve this, they should be covered with waterproof and UV-resistant tarpaulins or plastic sheets. This shielding will safeguard the rebars from rain, snow, or direct sunlight. 4. To prevent contact with water, dirt, or other contaminants that can accelerate corrosion, it is imperative to elevate the rebars from the ground. This can be accomplished by placing them on wooden supports or pallets. 5. When stacking rebars, it is important to ensure stability and prevent rolling or falling. Larger and heavier rebars should be positioned at the bottom of the stack to create a secure foundation. 6. Each stack should be clearly labeled with information such as size, length, and grade. This will facilitate easy identification. Furthermore, separating different sizes or types of rebars in the storage area will minimize confusion and aid in retrieval. 7. Regular inspections should be conducted to check for signs of corrosion, damage, or deformation. Any rebars showing signs of deterioration should be promptly removed to prevent accidents or compromised structural integrity. 8. When moving or transporting rebars, appropriate lifting equipment such as cranes, forklifts, or hoists should be used. Avoiding dragging or dropping the rebars is crucial, as it can cause deformation or damage. 9. It is vital to consult the manufacturer's guidelines for specific storage requirements and recommended practices pertaining to the particular type of steel rebars being used. By adhering to these guidelines, construction sites can ensure the proper storage of steel rebars. This, in turn, will help maintain their quality, prolong their lifespan, and guarantee the safety of both workers and structures.

Q: What is the minimum cover required for steel rebars in concrete?: The minimum cover required for steel rebars in concrete typically depends on the structural design and the intended exposure conditions. However, as a general guideline, the minimum cover requirement for steel rebars in concrete is usually specified as 1.5 inches (38 millimeters) for normal indoor or dry conditions, and may increase to 2 inches (51 millimeters) or more for harsher outdoor or corrosive environments. It is essential to consult the relevant building codes, standards, and engineering professionals to determine the specific minimum cover requirement for a particular project.

Q: What is the typical weight per meter of a steel rebar?: The typical weight per meter of a steel rebar can vary depending on its size and grade. However, as a general guideline, a standard mild steel rebar with a diameter of 10 millimeters (mm) usually weighs around 0.616 kilograms per meter (kg/m). For larger sizes, such as a 20 mm rebar, the weight per meter can increase to approximately 2.47 kg/m. It is important to note that these values are approximate and may vary slightly depending on the specific manufacturing standards and regional regulations.

Q: Can steel rebars be used in structures with high carbonation levels in concrete?: No, steel rebars should not be used in structures with high carbonation levels in concrete. Carbonation is a chemical process that occurs when carbon dioxide reacts with the alkaline components in concrete. It leads to a reduction in the alkalinity of the concrete, which can cause the passive layer protecting the steel rebars to dissolve. This exposes the steel to corrosion, which can weaken the structure over time. To mitigate the risk of corrosion, it is recommended to use alternative materials, such as stainless steel rebars, in structures with high carbonation levels. Stainless steel rebars have a higher resistance to corrosion than carbon steel rebars and can withstand the harsh environment created by high carbonation levels in concrete. Additionally, other corrosion protection measures, like epoxy coating or concrete cover thickness, should also be considered to further enhance the durability and longevity of the structure.

Q: How many patterns are there in threaded steel?: According to the shape of steel ribs, there are three kinds of patterns: herringbone spiral and crescent shaped patternSteel is commonly known as hot rolled ribbed bar, belonging to the small steel steel, mainly used for steel reinforced concrete structure frame. In use, some mechanical strength, bending deformation property and welding performance are required. The raw steel billet for the production of threaded steel is carbon structural steel or low alloy structural steel which is treated by calm melting, and the finished steel bar is delivered in hot rolling forming, normalizing or hot rolling state.

Q: What is the effect of impurities on the corrosion resistance of steel rebars?: The corrosion resistance of steel rebars can be significantly affected by impurities. Steel rebars consist primarily of iron and carbon, but varying amounts of impurities like sulfur, phosphorus, and silicon can also be present. One common impurity found in steel is sulfur. When sulfur reacts with water and oxygen, it forms sulfuric acid, which accelerates the corrosion process. This acid attack can cause rebars to deteriorate faster, reducing their overall strength and durability. Another impurity, phosphorus, can have a negative impact on the corrosion resistance of steel rebars. It can promote the formation of localized corrosion sites called pitting, which can lead to the development of rust and eventual structural damage. Although silicon is generally considered beneficial in steel production, excessive amounts can have adverse effects. Higher levels of silicon in rebars can result in the formation of a protective oxide layer. However, this layer can sometimes be porous, allowing corrosive agents to penetrate and cause corrosion. In conclusion, the presence of impurities in steel rebars can compromise their corrosion resistance. It is essential to ensure that construction steel meets specified standards and has minimal impurities. Additionally, proper maintenance and regular inspection of rebars are crucial to identify and address potential corrosion issues before they cause significant damage or structural failures.

Q: Can steel rebars be used in structures with high resistance to UV radiation?: Structures with high exposure to UV radiation typically do not recommend the use of steel rebars. Traditional carbon steel rebars are vulnerable to corrosion when exposed to UV radiation. The sun's rays can degrade the protective oxide layer on the surface of the steel, leading to rust and deterioration over time. Furthermore, UV radiation can cause the steel to expand and contract, weakening its overall strength and structural integrity. To address these concerns, alternative materials like stainless steel rebars or epoxy-coated rebars are commonly employed in structures that require high UV radiation resistance. Stainless steel rebars possess greater corrosion resistance and durability when exposed to UV radiation. Epoxy-coated rebars have a protective layer of epoxy coating that shields the steel from direct UV radiation, mitigating the risk of corrosion. Consulting structural engineers and professionals is crucial in determining the appropriate type of rebars for structures with high UV radiation resistance. Factors such as the specific environment, climate conditions, and project requirements should be carefully considered to ensure the structure's longevity and safety.

Q: What are the different sizes of steel rebars available?: The different sizes of steel rebars available vary depending on the specific needs and requirements of a construction project. Common sizes include #3 (3/8 inch), #4 (1/2 inch), #5 (5/8 inch), #6 (3/4 inch), #7 (7/8 inch), and #8 (1 inch). However, rebars can be manufactured in other sizes as well to cater to different structural applications.

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