ASTM Standard Reinforced Steel D Bar System 1

ASTM Standard Reinforced Steel D Bar System 2

ASTM Standard Reinforced Steel D Bar System 3

ASTM Standard Reinforced Steel D Bar System 4

ASTM Standard Reinforced Steel D Bar

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 500000 m.t./month

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Specification

Type:

Carbon Steel

Shape:

Steel Round Bar

Standard:

AISI,ASTM,EN,JIS,GB,BS,DIN

Steel Grade:

RHB335,HRB400

Surface Treatment:

Black,Galvanized

Shape:

Round

Technique:

Cold Rolled,Hot Rolled

Certification:

SGS,ISO

Length:

12m

Net Weight:

22kg

Thickness:

6mm

ASTM Standard Reinforced Steel D Bar

Description of ASTM Standard Reinforced Steel D Bar

1, Diameter: 5.5mm-10mm ASTM Standard Reinforced Steel D Bar

10m- 40mm ASTM Standard Reinforced Steel D Bar

2, Length: 6m, 9m, 12m or customized

3, Standard: GB, ASTM, AISI, SAE, DIN, JIS, EN

OEM technology - send detailed technical parameters for accurate quotation.

2, Produce Process: smelt iron - EAF smelt billet - ESR smelt billet -

hot rolled or forged to get the steel round bar and plate

3, Heat Treatment: annealing, normalizing, tempering, quenching

4, Surface Treatment: Black

5, Quality Assurance: We accept third party inspection for all orders.

You can ask testing organizations such as SGS, BV, etc. to test our products before shipping.

Chemical Composition of ASTM Standard Reinforced Steel D Bar

Grade	Technical data of the original chemical composition(%)
Reinforcing steel bar HRB335	C	Mn	Si	S	P	B
	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045	>0.0008
	Physics Capability
	Yield Strength(N/cm2)	Tensile Strength(N/cm2)	Elongation(%)
	≥ 335	≥490	≥16
Reinforcing steel bar HRB400	C	Mn	Si	S	P	B
	≤0.25	≤0.16	≤0.80	≤0.045	≤0.045	0.04-0.12
	Physics Capability
	Yield Strength(N/cm2)	Tensile Strength(N/cm2)	Elongation(%)
	≥ 400	≥ 570	≥ 14

Products Show of ASTM Standard Reinforced Steel D Bar

Company Information

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

Astm 615 Bs4449 B500B Deformed Steel Rebars

F A Q

1, Your advantages?

professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

3, Factory or Trading Company?

CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.

4, Payment Terms?

30% TT as deposit and 70% before delivery.

Irrevocable L/C at sight.

5, Trading Terms?

EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.

Q:How does special steel contribute to the magnetic properties of products?: The unique composition and structure of special steel contribute to the magnetic properties of products. This type of steel, also known as alloy steel, contains specific elements like nickel, chromium, manganese, and molybdenum, which alter its magnetic behavior. Depending on the desired application, these elements can either enhance or suppress the magnetism of the steel. For example, the addition of nickel increases the magnetic permeability of steel, making it more responsive to magnetic fields. This characteristic is extremely beneficial in applications such as transformers, where efficient magnetic flux conduction is necessary. Similarly, the inclusion of other magnetic elements like cobalt or iron can also improve the magnetic properties of special steel. On the other hand, certain elements can reduce or eliminate the magnetic qualities of steel. Chromium, for instance, is famous for its non-magnetic properties. When chromium is added to steel, it decreases its magnetic permeability, making it suitable for applications that require non-magnetic features, like medical equipment or electronics. Moreover, the magnetic properties of special steel are influenced by its structure. Heat treatment processes can manipulate the crystalline structure of the steel, thereby affecting its magnetization. For instance, annealing the steel can increase the size of the crystal grains, resulting in reduced magnetization. Conversely, cold working or quenching the steel can create a finer grain structure, enhancing its magnetic properties. In summary, by incorporating specific elements and manipulating its structure, special steel contributes to the magnetic properties of products. Depending on the application requirements, these elements can either enhance or suppress magnetism. The ability to tailor the magnetic properties of special steel makes it highly valuable in industries such as telecommunications, energy, and electronics.

Q:How does the carbon content affect the properties of special steel?: The properties of special steel are determined by the carbon content, playing a crucial role. Adding carbon to the steel modifies its microstructure and influences various mechanical and physical properties. The main impact of carbon content is on the steel's hardness and strength. Raising the carbon content in special steel leads to an increase in hardness. This occurs because carbon atoms occupy the interstitial sites in the iron lattice, causing a distortion in the crystal structure. Consequently, the steel becomes more resistant to deformation. Additionally, a higher carbon content results in a greater martensitic transformation during heat treatment, further enhancing the material's hardness. Moreover, the strength of special steel is significantly affected by the carbon content. Increased carbon levels lead to greater strength due to the formation of stronger and more abundant carbide precipitates. These carbides act as obstacles to the movement of dislocations, making it more challenging for the steel to deform under load. However, it is important to acknowledge that higher carbon content comes with certain trade-offs. As the carbon content increases, the steel's ductility decreases. This means that the material becomes less capable of deforming without fracturing. High carbon content can make the steel brittle, reducing its toughness and impact resistance. In addition to hardness and strength, carbon content impacts other properties of special steel. It affects the material's wear resistance, as higher carbon content leads to the formation of harder carbides that can withstand wear and abrasion. Carbon also influences the steel's machinability, with higher carbon content making the material more difficult to machine due to increased hardness. In conclusion, the carbon content significantly influences the properties of special steel. It affects hardness, strength, ductility, toughness, wear resistance, and machinability. Therefore, when determining the appropriate carbon content for special steel, careful consideration of desired properties and application requirements is necessary.

Q:How does special steel contribute to improving product safety in high-risk industries?: Special steel plays a crucial role in improving product safety in high-risk industries due to its unique properties and characteristics. Its exceptional strength, durability, and resistance to corrosion make it highly reliable and less prone to failure under extreme conditions. By using special steel in the manufacturing of critical components and structures, such as in aerospace, automotive, and oil and gas industries, it ensures enhanced safety and prevents potential accidents or catastrophic failures. Additionally, the strict quality control and certifications associated with special steel guarantee that it meets the industry's stringent safety standards, providing peace of mind to both manufacturers and end-users.

Q:What are the different corrosion protection techniques used for special steel?: There are several corrosion protection techniques used for special steel, including: 1. Coatings: Special steel can be coated with a variety of protective materials such as paints, epoxy, or other barrier coatings. These coatings act as a physical barrier between the steel and corrosive elements, preventing direct contact and potential damage. 2. Cathodic protection: This technique involves the use of sacrificial anodes or impressed current systems to protect the steel. Sacrificial anodes, typically made of zinc or aluminum, corrode instead of the steel, sacrificially protecting it. Impressed current systems use an external power source to provide a protective current that prevents corrosion. 3. Galvanization: Special steel can be hot-dip galvanized by immersing it in molten zinc. This creates a protective layer on the surface of the steel, significantly increasing its resistance to corrosion. 4. Alloying: Alloying the special steel with specific elements can enhance its corrosion resistance. For example, adding chromium to the steel can create a passive oxide layer that acts as a protective barrier against corrosion. 5. Passivation: Special steel can undergo passivation, a chemical process that removes free iron and other contaminants from the surface, promoting the formation of a protective oxide layer. Each of these techniques can be tailored to suit the specific requirements of the special steel and its intended application, providing effective corrosion protection and prolonging the lifespan of the material.

Q:How does special steel meet the requirements of specific industries?: Special steel meets the requirements of specific industries by offering superior characteristics such as high strength, corrosion resistance, heat resistance, and wear resistance. These properties make it suitable for applications in industries like automotive, aerospace, energy, and machinery, where durability, efficiency, and safety are crucial. Additionally, the versatility of special steel allows for customization and formulation of alloys that cater to specific industry needs, ensuring the desired performance and reliability in various applications.

Q:How does special steel contribute to sustainability efforts?: Special steel contributes to sustainability efforts in several ways. Firstly, it has a longer lifespan compared to regular steel, which reduces the need for frequent replacements and minimizes waste. Additionally, special steel is often made from recycled materials, reducing the demand for raw resources and decreasing the environmental impact of mining and extraction. Furthermore, its exceptional strength and durability allow for the construction of more energy-efficient buildings and infrastructure, reducing energy consumption and greenhouse gas emissions. Overall, special steel plays a vital role in promoting a more sustainable and eco-friendly approach in various industries.

Q:What are the different surface defects in special steel?: Some common surface defects in special steel include scale, pits, scratches, cracks, and inclusions. Scale refers to the formation of oxide layers on the surface, while pits are small depressions caused by corrosion or mechanical damage. Scratches can occur during handling or processing, while cracks are often due to excessive stress or improper heat treatment. Inclusions are foreign particles or impurities embedded in the steel, which can impact its overall quality and performance.

Q:What are the factors that affect the wear resistance of special steel?: The factors that affect the wear resistance of special steel include the composition of the steel, the hardness of the steel, the presence of carbides or other strengthening elements, the microstructure of the steel, the presence of surface treatments or coatings, the contact load or pressure applied to the steel, the sliding speed or velocity of the contact, the temperature at which the steel is operating, and the presence of any abrasive or corrosive media.

Q:What are the different methods for joining special steel?: There are several methods available for joining special steel, which is typically used in applications that require high strength, corrosion resistance, or specific mechanical properties. Some of the most common methods for joining special steel include: 1. Welding: This is the most common method used to join special steel. Different types of welding techniques can be employed, such as arc welding (including shielded metal arc welding, gas metal arc welding, and flux-cored arc welding), resistance welding (spot welding, seam welding), and laser welding. Welding requires the use of filler material to bond the steel pieces together, and it can produce strong and durable joints. 2. Brazing: Brazing involves joining special steel using a filler material (typically a brass or bronze alloy) with a lower melting point than the base steel. The filler material is heated until it melts and flows into the joint, creating a strong bond. Brazing is often used for joining dissimilar metals or when the base steel has a high melting point. 3. Soldering: Similar to brazing, soldering also involves using a filler material with a lower melting point to join special steel. However, soldering typically uses a non-ferrous filler material, such as tin-lead or tin-silver alloys. Soldering is commonly used for joining electronic components or delicate parts that cannot withstand high temperatures. 4. Mechanical Fastening: Special steel can also be joined using mechanical fasteners, such as bolts, screws, rivets, or clips. This method is often used when the joint needs to be easily disassembled, or when welding or brazing is not feasible or desirable. 5. Adhesive Bonding: Adhesive bonding involves using a specialized adhesive or glue to join special steel. This method is suitable for joining thin or delicate steel components or when the joint requires high resistance to vibration or shock. Adhesive bonding can provide a strong and durable bond, but it may not be suitable for high-temperature or high-stress applications. It is important to consider the specific requirements of the application, such as strength, corrosion resistance, temperature resistance, and the desired permanence of the joint, when selecting the appropriate method for joining special steel. Each method has its own advantages and limitations, and choosing the right method will ensure a strong and reliable joint.

Q:What are the different automotive grades of special steel?: In the automotive industry, various grades of special steel are utilized. Specifically tailored to meet the unique requirements of this sector, these grades offer a wide array of options. Some commonly employed grades encompass: 1. Advanced High-Strength Steels (AHSS): Renowned for their exceptional strength and remarkable formability, AHSS is employed in critical automotive components such as chassis, body panels, and safety systems. This utilization enhances crash performance while simultaneously reducing weight. 2. Dual-Phase Steels (DP): DP steels, a subcategory of AHSS, provide a combination of high strength and good ductility. They find common use in automotive applications necessitating both strength and formability, such as structural components and reinforcements. 3. Martensitic Steels: Distinguished by their high strength and hardness, martensitic steels are frequently utilized in automotive applications requiring resistance to wear and impact. Examples include crankshafts, gears, and axles. 4. Transformation-Induced Plasticity (TRIP) Steels: TRIP steels are designed to offer high strength, excellent formability, and superior energy absorption during impacts. They find application in automotive safety components like bumper reinforcements and crash boxes. 5. High-Strength Low-Alloy (HSLA) Steels: HSLA steels strike a balance between strength, formability, and cost-effectiveness. They are commonly employed in automotive structural components and suspension systems, aiding in weight reduction while maintaining structural integrity. 6. Stainless Steels: Exhibiting corrosion resistance, stainless steels are ideal for automotive applications that necessitate protection against rust and corrosion. This includes exhaust systems, fuel tanks, and decorative trims. The diverse range of special steel grades empowers automotive manufacturers with ample choices to cater to specific needs in terms of strength, formability, durability, and corrosion resistance. The selection of the appropriate grade hinges on the intended application and desired performance characteristics.

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