A615 deformed steel bars for construction

A615 deformed steel bars for construction System 1

A615 deformed steel bars for construction

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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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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

A615 deformed steel bars for construction

FAQ：

Q1: What makes stainless steel stainless?

A1: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.

Q2: Can stainless steel rust?

A2: Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface.

Q:Can steel rebars be used in structures with limited construction permits?: Steel rebars can typically be used in structures with limited construction permits, as they are commonly used in construction due to their strength and durability. However, it is important to consult the specific regulations and limitations outlined in the construction permits. These permits may have restrictions on the types of materials that can be used, including the size and composition of rebars. It is advisable to consult with a structural engineer or the local building authority to ensure compliance with the construction permits and to determine if steel rebars are allowed in the particular structure.

Q:What are the guidelines for handling and installing steel rebars in construction sites?: The guidelines for handling and installing steel rebars in construction sites typically include the following: 1. Storage: Steel rebars should be stored on a flat and dry surface, preferably on elevated racks to prevent contact with the ground and avoid rusting or damage. 2. Transportation: Rebars should be moved using appropriate lifting equipment, such as cranes or forklifts, to prevent excessive bending or mishandling. 3. Inspection: Rebars should be inspected for any defects, such as bends, cracks, or excessive rust, before installation. Damaged rebars should not be used. 4. Cutting and bending: Rebars should be cut and bent using appropriate tools and equipment, following the specifications and dimensions provided in the construction plans. 5. Placement: Rebars should be placed accurately and securely within the concrete structures, ensuring proper alignment and spacing as per the design requirements. 6. Tying: Rebars should be securely tied together using wire or approved tying methods at the intersections to maintain the desired positions during concrete pouring. 7. Embedment: Rebars should be properly embedded within the concrete to ensure sufficient coverage, typically complying with the minimum concrete cover specified in the design. 8. Safety: Adequate personal protective equipment (PPE), such as gloves and safety boots, should be worn by workers during rebars handling and installation to prevent injuries. It is important to note that specific construction projects and local regulations may have additional guidelines or requirements for handling and installing steel rebars. Therefore, it is crucial to refer to the project specifications and consult with relevant experts or authorities for comprehensive guidelines.

Q:What are the different types of corrosion protection coatings for steel rebars?: Steel rebars have a variety of corrosion protection coatings available, each offering different levels of durability and protection. 1. Epoxy Coatings: Considered one of the most effective options, epoxy coatings create a thick and durable barrier that prevents moisture and corrosive substances from reaching the steel surface. They can be applied using spray, brush, or dip methods and exhibit excellent adhesion and resistance to chemicals. 2. Zinc Coatings: Zinc coatings, such as hot-dip galvanization or zinc-rich paint, are a popular choice for corrosion protection. These coatings sacrifice the zinc to protect the steel rebars, making them highly effective even in harsh environments. The thickness of the zinc coating can be adjusted based on the desired level of protection. 3. Fusion-Bonded Epoxy (FBE) Coatings: FBE coatings are commonly used in underground or submerged applications. They are applied by heating the steel rebar, causing the epoxy powder to melt and bond to the surface. FBE coatings provide excellent resistance to corrosion, chemicals, abrasion, and impact. 4. Polymer Coatings: Polymer coatings, such as polyurethane or polyethylene, are ideal for high-temperature environments or situations requiring chemical resistance. These coatings form a protective barrier that is resistant to UV radiation, abrasion, and chemicals. They can be applied using spray or dip methods and adhere well to the steel surface. 5. Concrete Coatings: In reinforced concrete structures, the concrete itself can act as a corrosion protection coating for steel rebars. The high alkalinity of concrete creates a passivating layer around the steel, preventing corrosion. Corrosion inhibitors added to the concrete mix can enhance the protection of steel rebars. Choosing the right corrosion protection coating depends on factors such as the environment, intended use, and desired durability. Consulting with corrosion protection experts or experienced engineers can help determine the most suitable coating for steel rebars in any given situation.

Q:What are the different methods of reinforcing concrete structures using steel rebars?: There are several methods of reinforcing concrete structures using steel rebars. 1. Traditional Reinforcement: This method involves placing steel rebars in the formwork before pouring concrete. The rebars are positioned in a predetermined pattern and secured with wire or tie rods to ensure they stay in place during the concrete placement. This method is commonly used for reinforcing columns, beams, and slabs. 2. Pre-stressed Reinforcement: In this method, high-strength steel rebars are pre-stressed before being placed in the concrete structure. This is usually achieved by stretching the rebars and then anchoring them to resist the tensile forces that will be exerted on the structure. Pre-stressed reinforcement is commonly used in bridges and large-span structures where high strength and durability are required. 3. Post-tensioning: Post-tensioning is a technique used to reinforce concrete structures after the concrete has hardened. It involves inserting steel tendons into pre-determined ducts or sleeves within the concrete and then applying tension to the tendons using hydraulic jacks. This process helps to counteract the tensile forces and increase the overall strength and load-carrying capacity of the structure. 4. Fiber Reinforcement: Instead of using traditional steel rebars, fiber reinforcement involves adding small fibers made of materials like glass, polypropylene, or steel to the concrete mix. These fibers help to distribute and control cracks that may occur due to shrinkage or thermal expansion. Fiber reinforcement is often used in applications such as industrial flooring, shotcrete, and precast concrete products. 5. Reinforced Concrete Masonry: In this method, steel rebars are inserted into the mortar joints of concrete masonry units (CMUs) to increase the strength and stability of the structure. The rebars are placed vertically and horizontally at specific intervals and then grouted to ensure a solid bond between the rebars and the CMUs. Overall, these different methods of reinforcing concrete structures using steel rebars provide various options for engineers and designers to enhance the strength, durability, and load-carrying capacity of concrete structures, depending on the specific requirements of the project.

Q:Can steel rebars be used in underwater construction?: Yes, steel rebars can be used in underwater construction. They are commonly used to reinforce concrete structures in underwater environments such as bridges, piers, and offshore platforms. The steel rebars are designed to be corrosion-resistant, ensuring their durability and strength even when submerged in water for extended periods.

Q:How are steel rebars tested for tensile strength?: Steel rebars are tested for tensile strength by subjecting them to a controlled amount of force, typically in a laboratory setting. This is done by placing the rebar in a specialized machine called a universal testing machine (UTM) that can apply an increasing load to the rebar until it reaches its breaking point. The UTM measures the amount of force required to break the rebar, which determines its tensile strength.

Q:Are there any safety precautions to be followed while working with steel rebars?: Yes, there are several safety precautions that should be followed while working with steel rebars. Firstly, it is important to wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and steel-toed boots to protect against potential hazards. Secondly, workers should be trained on proper lifting techniques and use mechanical aids if necessary to prevent musculoskeletal injuries. Additionally, it is crucial to ensure a clean and organized work area to minimize the risk of tripping or falling. Finally, workers should be cautious of sharp edges and use proper tools and equipment when handling steel rebars to avoid cuts or punctures.

Q:Can steel rebars be used in foundations and footings?: Yes, steel rebars can be used in foundations and footings. Steel rebars are commonly used to reinforce concrete structures, including foundations and footings, to provide added strength and stability. They help to prevent cracking and increase the structural integrity of the foundation or footing.

Q:How are steel rebars connected to each other in a reinforced concrete structure?: Steel rebars are typically connected to each other in a reinforced concrete structure through a process called rebar splicing. This involves overlapping the rebars and securing them together using mechanical couplers, welding, or by using threaded connections. These connections ensure that the rebars work together to provide the necessary strength and stability to the structure.

Q:What is the purpose of ribbed steel rebars?: The purpose of ribbed steel rebars is to provide reinforcement and enhance the strength of concrete structures, such as buildings, bridges, and roads. The ribs on the rebar increase the bond between the steel and concrete, preventing slippage and improving the overall structural integrity.

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