High Quality GB Standard Deformed Steel Rebar HRB400

High Quality GB Standard Deformed Steel Rebar HRB400 System 1

High Quality GB Standard Deformed Steel Rebar HRB400

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 50 m.t.

Supply Capability:: 100000 m.t./month

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Specifications of High Quality GB Standard Deformed Steel Rebar HRB400

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 of High Quality GB Standard Deformed Steel Rebar HRB400

(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 High Quality GB Standard Deformed Steel Rebar HRB400

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 High Quality GB Standard Deformed Steel Rebar HRB400

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

High Quality GB Standard Deformed Steel Rebar HRB400

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.

Q: How are steel rebars protected against lightning strikes?: The process of "bonding" shields steel rebars from lightning strikes. When constructing a building, steel rebars are linked to a lightning protection system to safely redirect the electrical energy of a lightning strike into the ground. This system typically comprises lightning rods or air terminals positioned at the highest points of the building to attract the lightning strike. Subsequently, the rebars are interconnected with conductor cables, creating a network that effectively grounds the lightning current. The conductor cables are fastened to the lightning rods and extend down the building, connecting with the rebars at various points. By bonding the rebars with the lightning protection system, the electrical charge from a lightning strike is efficiently conducted away from the building and harmlessly discharged into the ground. Moreover, additional precautions such as surge protection devices are frequently installed to further safeguard the rebars and the overall building from potential damage caused by voltage surges resulting from lightning strikes. These surge protection devices assist in minimizing the risk of electrical surges that could potentially compromise the integrity of the rebars. To conclude, steel rebars are shielded against lightning strikes by establishing a proper bond with a lightning protection system. This ensures that the electrical energy from a lightning strike is securely directed away from the building and grounded, thereby reducing the risk of damage to the rebars and the overall structural integrity.

Q: What is the difference between the II and III grades of threaded steel?: The difference between three grade steel and two grade steel can be divided into the following aspects:1, different grades of steel (chemical composition is different). HRB335 grade steel is 20MnSi (20 manganese silicon); HRB400 grade steel bars are 20MnSiV or 20MnSiNb or 20MnTi etc.;2, strength is different, HRB335 grade steel tensile and compressive design strength is 300MPa, HRB400 grade steel tensile and compressive design strength is 360MPa.3, because of the chemical composition of steel and the ultimate strength of different, so in toughness, cold bending, fatigue and other properties are also different.

Q: What are the guidelines for the proper storage of steel rebars on construction sites?: The guidelines for the proper storage of steel rebars on construction sites include keeping them in a designated area, away from moisture and dirt, stacking them horizontally and evenly, using supports or racks to prevent bending or deformation, and ensuring that they are easily accessible for use when needed. Additionally, rebars should be inspected regularly for any signs of corrosion or damage.

Q: Can steel rebars be used in the construction of airport runways and taxiways?: Yes, steel rebars can be used in the construction of airport runways and taxiways. Steel rebars provide strength and reinforcement to the concrete used in these structures, ensuring their durability and ability to withstand heavy aircraft traffic.

Q: What is the role of steel rebars in preventing concrete segregation?: Steel rebars play a crucial role in preventing concrete segregation by providing structural support and reinforcement to the concrete. When concrete is poured, it is in a liquid state and has a tendency to separate or segregate, with heavier aggregates settling at the bottom and lighter materials rising to the top. This can lead to an inconsistent and weak concrete structure. By placing steel rebars within the concrete, they act as a framework or skeleton, holding the concrete together and preventing segregation. The rebars help distribute the weight and forces evenly, ensuring that the concrete mixture remains well-mixed and homogeneous throughout. Additionally, steel rebars also enhance the tensile strength of the concrete. While concrete is strong in compression, it is relatively weak in tension. The rebars absorb the tensile forces, preventing cracks and fractures from forming in the concrete. This reinforcement allows the concrete structure to withstand external loads, such as the weight of a building or the force of an earthquake, without breaking apart. In summary, the role of steel rebars in preventing concrete segregation is twofold - they provide structural support and reinforcement, ensuring a homogeneous mixture and enhancing the overall strength and durability of the concrete structure.

Q: How do steel rebars affect the overall aesthetics of a structure?: Steel rebars typically do not have a direct impact on the overall aesthetics of a structure as they are usually hidden within the concrete. However, they play a crucial role in providing structural integrity, durability, and reinforcement to the building. The proper placement and alignment of rebars ensure that the structure can withstand various loads and forces, thus enhancing its safety and longevity. While rebars may not contribute directly to the aesthetics, their presence indirectly influences the overall appearance by enabling the construction of architecturally intricate and visually appealing designs.

Q: How do steel rebars resist buckling in concrete structures?: Steel rebars resist buckling in concrete structures due to their high strength and stiffness. When concrete is subjected to compressive forces, it tends to expand laterally, leading to the development of cracks. These cracks weaken the concrete and reduce its ability to bear loads. However, by introducing steel rebars into the concrete, the tensile strength of the structure is greatly enhanced. Steel rebars, which are made of high-strength steel alloys, have exceptional tensile strength. When concrete is subjected to compressive forces, the rebars bear the tensile stresses that occur within the structure. The rebars act as reinforcement, preventing the concrete from cracking and providing additional support to the structure. Moreover, the presence of rebars helps to distribute the compressive forces more evenly throughout the concrete. This ensures that the load is spread over a larger area, reducing the likelihood of localized buckling. The rebars effectively increase the overall stiffness of the structure, making it more resistant to buckling and deformation. Additionally, the bond between the steel rebars and the surrounding concrete plays a crucial role in resisting buckling. The rough surface of the rebars allows for enhanced adhesion with the concrete, creating a strong bond. This bond transfers the applied load from the concrete to the rebars, preventing the concrete from buckling and maintaining the structural integrity of the system. Overall, the combination of high tensile strength, improved load distribution, and strong bond with the concrete enables steel rebars to resist buckling in concrete structures. The presence of rebars significantly enhances the structural performance, ensuring the safety and durability of the concrete structure.

Q: Are there any specific safety measures to be taken while working with steel rebars?: Yes, there are specific safety measures to be taken while working with steel rebars. Some important safety precautions include wearing personal protective equipment such as gloves, safety goggles, and steel-toed boots, as well as using proper lifting techniques to prevent strain or back injuries. It is also crucial to maintain a clean and organized work area, secure the rebars properly to prevent them from falling or rolling, and ensure that all workers are trained in safe handling and cutting techniques. Additionally, regular inspections of the rebars for potential defects or damage should be conducted to avoid any accidents or structural issues.

Q: Can steel rebars be used in corrosive chemical environments?: Steel rebars can be used in corrosive chemical environments, but their performance and durability may be compromised. Steel is susceptible to corrosion when exposed to certain chemicals, especially those that are acidic or contain chlorides. In such corrosive environments, the rebars can undergo corrosion, leading to structural damage and reduced load-bearing capacity. To mitigate the corrosion risk, various measures can be taken. One common approach is to coat the rebars with a protective layer, such as epoxy or zinc coating, to create a barrier between the steel and the corrosive environment. Additionally, using stainless steel rebars or other corrosion-resistant alloys can provide better resistance against chemical corrosion. It is crucial to consider the specific chemicals present in the environment and consult with corrosion engineers and experts to determine the appropriate measures for using steel rebars in corrosive chemical environments. Proper maintenance and regular inspections are also necessary to monitor any signs of corrosion and take prompt corrective action to ensure the structural integrity and safety of the reinforced concrete structures.

Q: Can steel rebars be used in structures with high sulfate content in soil or water?: Steel rebars should not be used in structures with high sulfate content in soil or water. Sulfates react with steel, especially with the iron present in the steel rebars, causing corrosion and weakening the structure. This process, known as sulfide attack or sulfate attack, can lead to the deterioration of the rebars and ultimately compromise the integrity of the entire structure. Therefore, alternative materials such as stainless steel rebars or non-metallic reinforcement like fiber-reinforced polymers (FRP) should be considered in such environments to ensure the longevity and safety of the structure.

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