Hot rolled deformed bar BS4449 G460B HRB400

Hot rolled deformed bar BS4449 G460B HRB400 System 1

Hot rolled deformed bar BS4449 G460B HRB400

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 m.t./month

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Deformed Bar Details:

Minimum Order Quantity:	m.t.	Unit:	m.t.	Loading Port:
Supply Ability:	m.t./month	Payment Terms:	TT OR LC	Package:	wire rod packing

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: How do steel rebars reinforce concrete?: Steel rebars reinforce concrete by providing additional strength and stability to the structure. When concrete is poured, it is strong in compression but weak in tension. Steel rebars are embedded within the concrete to counterbalance this weakness and enhance its tensile strength. The rebars act as a reinforcement by absorbing the tensile forces that occur when a structure is subjected to bending or stretching. When such forces are applied, the rebars distribute the load across the concrete, preventing cracks and failure. This is crucial in structures such as buildings, bridges, and dams, where the concrete needs to withstand various external forces. The rebars also help to control the expansion and contraction of the concrete due to temperature changes. Since steel has a similar coefficient of thermal expansion as concrete, it helps to minimize the stress that occurs due to temperature fluctuations, reducing the risk of cracking. Moreover, the bond between the steel rebars and the concrete is essential for effective reinforcement. The rough surface of the rebars provides an excellent grip with the surrounding concrete, ensuring that they work together as a composite material. This bond enables the transfer of stress from the concrete to the rebars, enhancing the overall strength and durability of the structure. In summary, steel rebars reinforce concrete by adding tensile strength, distributing loads, controlling temperature-induced stress, and creating a strong bond with the concrete. This combination of concrete and steel creates a reinforced concrete structure that can withstand various external forces and maintain its structural integrity over time.

Q: What is the elongation of steel rebars?: The elongation of steel rebars pertains to how much they can deform or stretch before fracturing or breaking. It measures the ductility or flexibility of the steel rebars. Elongation is typically expressed as a percentage of the rebar's original length. The elongation of steel rebars varies based on the grade or type of steel used and the manufacturing processes involved. In general, steel rebars have a relatively high elongation compared to materials like concrete or timber. This makes them suitable for applications that require flexibility and resistance to deformation, such as reinforced concrete structures. Considering the elongation of steel rebars is crucial in structural design and construction. It affects the rebar's ability to withstand loads, particularly when subjected to tension or bending forces. Higher elongation values indicate a greater capacity for the rebar to stretch and deform without breaking, enhancing the overall performance and safety of the structure. To ensure the proper selection and utilization of steel rebars, it is essential to refer to the relevant standards and specifications provided by regulatory bodies and industry organizations. These guidelines outline specific requirements and recommendations for the elongation of steel rebars, along with other mechanical properties, to guarantee the structural integrity of construction projects.

Q: What is the difference between hot-rolled and cold-worked steel rebars?: Hot-rolled steel rebars are produced by heating the steel billet to high temperatures and then passing it through rollers to shape and form it. This process results in rebars with a rough surface and varying dimensions. On the other hand, cold-worked steel rebars are produced by subjecting the hot-rolled rebars to a process called cold working, which involves further shaping and sizing by passing them through dies or rollers at room temperature. This process results in rebars with a smoother surface, tighter dimensional tolerances, and increased strength.

Q: How are steel rebars affected by long-term exposure to water?: Steel rebars are susceptible to corrosion when exposed to water for a prolonged period. The presence of moisture and oxygen initiates an electrochemical reaction, causing the steel to rust and gradually weaken over time. This can compromise the structural integrity of the rebars and the surrounding concrete, leading to potential structural failure if not addressed.

Q: Can steel rebars be used in wastewater treatment plant construction?: Certainly, steel rebars are applicable for the construction of wastewater treatment plants. They are frequently utilized in the development of reinforced concrete structures, specifically in the context of wastewater treatment facilities. These rebars contribute to the concrete's enhanced strength and durability, enabling it to endure the harsh and corrosive conditions commonly encountered in such facilities. To shield the rebars from the corrosive impact of wastewater, they are typically coated with epoxy or other corrosion-resistant substances. Furthermore, the proper design and positioning of the rebars guarantee the structural soundness and longevity of the treatment plant. In conclusion, steel rebars serve as a widely employed and effective reinforcement material in wastewater treatment plant construction.

Q: How do steel rebars affect the shrinkage and creep of concrete?: Concrete's shrinkage and creep behavior can be significantly influenced by steel rebars. Shrinkage refers to the concrete's volume reduction caused by moisture loss during drying, while creep refers to its time-dependent deformation under sustained load. The inclusion of steel rebars helps mitigate concrete shrinkage. As the concrete shrinks, the rigid rebars resist this reduction and provide restraint. This restraint minimizes volume changes and reduces cracking caused by shrinkage. Moreover, the tensile strength of rebars allows them to distribute stress and prevent localized cracking, further minimizing the impact of shrinkage on overall concrete performance. Regarding creep, steel rebars can increase concrete's deformation. This is because the rebars introduce additional stress and strain, leading to greater creep deflections. However, compared to factors like mix design, water-cement ratio, and curing conditions, the effect of steel rebars on creep is generally considered minor. It's important to note that proper reinforcement layout design and detailing can minimize the impact of steel rebars on shrinkage and creep. Adequate spacing, rebars cover, and reinforcement ratios optimize both concrete and rebars' performance. Additionally, the use of supplementary cementitious materials like fly ash or silica fume can reduce shrinkage and mitigate creep's impact. In summary, steel rebars are crucial in minimizing concrete's shrinkage-related issues through restraint and stress distribution. Though they may increase creep deformation, their impact is generally minor compared to other factors. Proper reinforcement design and detailing optimize concrete and steel rebars' performance in terms of shrinkage and creep.

Q: How do steel rebars improve the flexural strength of concrete?: Steel rebars improve the flexural strength of concrete by providing tensile strength, which is typically lacking in concrete. The rebars act as reinforcement, absorbing the tension forces that occur when the concrete is subjected to bending or flexing. This combination of concrete and steel rebars creates a composite material that is stronger and more resistant to cracking or breaking under flexural loads.

Q: How to judge the quality of thread steel?: Use material tester to measure data, then compare with national standard data.

Q: Are there any restrictions on the use of steel rebars in certain regions?: Yes, there are certain restrictions on the use of steel rebars in certain regions. These restrictions can vary from region to region and are typically put in place to ensure the safety and integrity of structures. In some areas, building codes and regulations may dictate specific requirements for the use of steel rebars, such as the type, size, and placement of rebars. Additionally, there may be restrictions on the use of certain types of steel rebars, such as epoxy-coated rebars, due to environmental concerns. It is important for construction professionals to familiarize themselves with the local building codes and regulations to ensure compliance and promote the safety and durability of structures.

Q: How do steel rebars impact the overall constructability and scheduling of concrete projects?: Steel rebars have a significant impact on the overall constructability and scheduling of concrete projects. They provide structural reinforcement to concrete, increasing its strength and durability. The inclusion of rebars in the concrete design requires careful planning and coordination, as they need to be accurately positioned and supported within the concrete forms. This process can add complexity to the construction process, potentially affecting the project's timeline. However, rebars ultimately enhance the project's constructability by ensuring the structural integrity of the concrete elements, leading to safer and more reliable structures.

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