Deformed Bar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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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:How are steel rebars protected against lightning strikes?: Steel rebars are typically protected against lightning strikes through the implementation of lightning rods or conductive bonding systems. These systems help to divert the electrical current from lightning strikes away from the rebars and into the ground, reducing the risk of damage or corrosion caused by the high voltage.

Q:What are the different types of steel rebars used in column reinforcement?: There are several types of steel rebars used in column reinforcement, including mild steel rebars, high-strength rebars, epoxy-coated rebars, and stainless steel rebars.

Q:What is the content ratio of the screw steel and manganese steel?: The standard type of high manganese steel Mn13 steel and Hadfield steel, high manganese steel castings in China National Standard (GB/T5680-1998) grade: ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5; ASTM (ASTMA128/A128M-1993) standard austenitic manganese steel casting steel are: ASTM-A (UNS-J9110.

Q:How do steel rebars contribute to the sustainability of a building?: There are several ways in which steel rebars contribute to the sustainability of a building. To begin with, the utilization of steel rebars in reinforced concrete structures enhances the overall strength and durability of the building, thus extending its lifespan. This, in turn, reduces the frequency of repairs or replacements, resulting in less material consumption and waste generation over time. Moreover, steel rebars are manufactured from recycled materials, with a significant proportion being derived from scrap metal. This helps to decrease the demand for new steel production, which is an energy-intensive process and contributes to carbon emissions. By making use of recycled steel rebars, buildings can significantly reduce their carbon footprint and conserve natural resources. Furthermore, steel rebars aid in improving the structural integrity of the building, making it more resistant to various external forces such as earthquakes, hurricanes, and other natural disasters. This increased resilience decreases the potential for catastrophic damage and the subsequent need for major reconstruction or demolition, thus saving both resources and costs. Additionally, the utilization of steel rebars allows for the construction of taller and more open spaces, enabling efficient use of the building's footprint. This is particularly relevant in urban areas where land availability is limited. By enabling the construction of taller buildings, steel rebars contribute to urban densification, which helps to reduce urban sprawl and preserve natural habitats. Lastly, steel rebars are highly recyclable at the end of their service life. When a building is demolished, the steel rebars can be easily extracted and recycled, avoiding the accumulation of construction waste in landfills. The recycling of steel rebars saves energy and reduces the need for extracting and processing new materials, further contributing to the sustainability of the construction industry. In conclusion, steel rebars play a crucial role in enhancing the sustainability of a building by increasing its durability, utilizing recycled materials, improving structural resilience, enabling efficient land use, and facilitating the recycling of materials at the end of a building's life cycle.

Q:What are the factors that determine the spacing and diameter of steel rebars?: The factors that determine the spacing and diameter of steel rebars include the structural design requirements, the load and stress distribution within the concrete structure, the type and size of the structure being reinforced, and the concrete's strength and durability requirements. Additionally, local building codes and regulations may also influence the spacing and diameter of steel rebars.

Q:What is the lifespan of a steel rebar in a concrete structure?: The duration of a steel rebar's existence within a concrete structure may differ due to various factors. Generally, a well-designed and properly constructed concrete structure with steel reinforcement can endure for 50 to 100 years or even longer. One critical factor that affects its lifespan is the quality of the concrete and its ability to shield the steel reinforcement from external elements. Concrete acts as a barrier, safeguarding the steel rebar from moisture, oxygen, and other potentially corrosive substances. However, if the concrete is of inadequate quality, contains excessive amounts of chloride or other aggressive chemicals, or is not adequately cured, it can result in the deterioration of the rebar and significantly reduce its lifespan. Another significant aspect is the exposure conditions to which the concrete structure is exposed. If the structure is situated in a harsh environment with high levels of humidity, exposure to saltwater, or industrial pollutants, it can expedite the corrosion process and decrease the rebar's lifespan. Proper maintenance and periodic inspections can also have a substantial impact on prolonging the steel rebar's lifespan within a concrete structure. Regular inspections can help identify any initial signs of corrosion or deterioration, enabling timely repairs or implementation of protective measures. To enhance the lifespan of steel rebar, additional protective measures can be taken during construction, such as applying corrosion-resistant coatings or utilizing stainless steel reinforcement. These measures can significantly extend the rebar's lifespan and improve the overall durability of the concrete structure. In conclusion, the lifespan of a steel rebar in a concrete structure can vary but generally falls within the range of 50 to 100 years or more, assuming the concrete is of good quality, the exposure conditions are not excessively severe, and proper maintenance and protective measures are implemented.

Q:How do steel rebars affect the overall fire safety of concrete structures?: The overall fire safety of concrete structures can be affected by steel rebars, both positively and negatively. On the positive side, steel rebars can strengthen the fire resistance of concrete structures. Concrete has low thermal conductivity, which means it doesn't easily conduct heat. However, exposure to fire can cause concrete to crack and lose its integrity. Steel rebars help address this issue by providing additional tensile strength, acting as reinforcement to prevent cracking and collapse under intense heat. On the flip side, steel rebars can pose challenges to fire safety. Steel is a good heat conductor, transferring heat from the fire to other parts of the structure. This can weaken the concrete and compromise overall fire safety. Furthermore, steel rebars can expand under high temperatures, potentially causing more cracking and damage to the concrete. To improve fire safety in concrete structures with steel rebars, several measures can be taken. Applying fire-resistant coatings or fireproofing materials on the rebars can minimize heat transfer to the surrounding concrete. Installing fire-resistant insulation or fire barriers around the rebars can also offer additional protection. Proper design and construction practices, including appropriate spacing and size of rebars, are crucial to maintaining the fire resistance of the concrete structure. In conclusion, steel rebars have a significant impact on the fire safety of concrete structures. While they enhance fire resistance, challenges such as heat transfer and expansion must be addressed. By implementing appropriate measures and construction practices, the negative effects of steel rebars on fire safety can be minimized, resulting in improved fire resistance for concrete structures.

Q:Can steel rebars be painted or coated?: Yes, steel rebars can be painted or coated. Painting or coating steel rebars helps to protect them from corrosion and extend their lifespan. It is a common practice in construction and reinforcement projects to apply paint or protective coatings on steel rebars to enhance their durability and resistance to environmental factors.

Q:Can steel rebars be used in structures with high radiation shielding requirements?: Structures with high radiation shielding requirements can indeed utilize steel rebars. Steel is renowned for its remarkable strength and durability, making it a favored option for reinforcing concrete structures. In terms of radiation shielding, steel rebars possess the capability to effectively offer a certain level of protection due to their dense composition. Although steel itself is not as potent a radiation shield as materials like lead or concrete, it still plays a role in reducing radiation transmission. The density of steel aids in dispersing and absorbing some of the radiation that passes through the structure, thus diminishing overall exposure. However, it is crucial to recognize that structures with exceptionally high radiation shielding requirements may necessitate additional measures. These measures could involve incorporating other radiation-absorbing materials such as lead or concrete, or implementing specific design features to enhance the structure's shielding capabilities. Ultimately, the selection of materials and design considerations should be made in collaboration with radiation safety experts and engineers who can evaluate the specific shielding requirements and propose the most suitable solutions.

Q:What are the different types of coating for steel rebars?: There are several different types of coatings that can be applied to steel rebars, including epoxy, zinc, and galvanized coatings. Epoxy coatings provide a protective barrier against corrosion and can be applied as a liquid or powder. Zinc coatings, such as hot-dip galvanizing, involve immersing the steel rebar in molten zinc, forming a durable protective layer. Galvanized coatings involve a similar process but typically use a thinner layer of zinc. These coatings help to extend the lifespan of the steel rebar and prevent corrosion.

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