Gr40 Ribbed High Quality Steel Rebar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 170 m.t.
- Supply Capability:
- 500000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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Specification
Type:
Carbon Steel
Shape:
Steel Round Bar
Gr40 Ribbed High Quality Steel Rebar
Description of Gr40 Ribbed High Quality Steel Rebar
1, Diameter: 5.5mm-10mm Gr40 Ribbed High Quality Steel Rebar
10m- 40mm Gr40 Ribbed High Quality Steel Rebar
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 Gr40 Ribbed High Quality Steel Rebar
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 Gr40 Ribbed High Quality Steel Rebar
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.
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 perform in high-impact applications?
- Special steel is specifically designed to withstand high-impact applications. It has superior strength, toughness, and durability, allowing it to withstand extreme forces without deformation or failure. Its unique composition and manufacturing process make it highly resistant to fractures and cracks, making it ideal for applications where impact resistance is critical, such as in construction, automotive, and aerospace industries.
- Q: How does surface treatment affect the performance of special steel?
- The performance of special steel is greatly enhanced by surface treatment, which serves the essential purpose of altering the steel's surface properties to meet specific requirements and improve its performance in various applications. One notable effect of surface treatment on special steel is the increased resistance to corrosion. Coatings or treatments such as galvanization, electroplating, or passivation are applied to make the steel's surface more resilient against the damaging effects of moisture, chemicals, and other corrosive agents. This is particularly crucial in industries like construction, automotive, or marine, where steel is subjected to harsh environments. Surface treatment also has an impact on the wear resistance of special steel. Through processes like carburizing, nitriding, or boriding, a thin layer of hard and wear-resistant material is formed on the surface of the steel. This significantly enhances its ability to withstand friction, abrasion, and mechanical stress, making it suitable for applications involving heavy machinery, cutting tools, or bearings. Moreover, surface treatment can enhance the aesthetic appeal of special steel. Techniques such as polishing, grinding, or coating can be employed to improve the appearance of the steel, making it more visually pleasing for architectural or decorative purposes. Another crucial aspect affected by surface treatment is the adhesion properties of the steel. By modifying the surface through processes like shot peening or surface etching, the steel becomes more receptive to adhesives, paints, or coatings. This improves the bond strength between the steel and other materials, making it suitable for applications where adhesion is critical, such as in the aerospace or electronics industries. To summarize, surface treatment has a significant impact on the performance of special steel. It enhances corrosion resistance, wear resistance, adhesion properties, and aesthetic appeal. Manufacturers can maximize the steel's performance and extend its lifespan by selecting the appropriate surface treatment techniques to tailor its surface properties to meet specific application requirements.
- Q: How does special steel withstand high temperatures?
- Due to its distinctive composition and manufacturing process, special steel demonstrates exceptional resistance to high temperatures. Firstly, special steel incorporates alloys that consist of elements like chromium, nickel, and molybdenum, thus providing heightened heat resistance. These elements form a protective oxide layer on the steel's surface, effectively preventing oxidation and corrosion when exposed to elevated temperatures. Moreover, special steel undergoes specific heat treatment procedures, such as quenching and tempering, which enhance its strength and toughness. These procedures involve subjecting the steel to high temperatures followed by rapid cooling, and then reheating and slow cooling. This controlled heating and cooling process alters the steel's microstructure, resulting in increased resistance to thermal stress and deformation. Additionally, special steel is often designed with a high melting point, enabling it to maintain its structural integrity even in extreme temperature conditions. The precise combination and proportions of elements in the alloy contribute to the steel's ability to resist softening or melting when confronted with intense heat. Furthermore, special steel may also incorporate specialized coatings or treatments that further enhance its thermal resistance. These coatings provide an additional layer of protection against heat, oxidation, and corrosion, thereby enhancing the steel's durability and longevity in high-temperature environments. To sum up, special steel's ability to withstand high temperatures is attributed to its unique alloy composition, heat treatment processes, high melting point, and additional protective coatings. These factors work in harmony to enhance the steel's resistance to thermal stress, deformation, oxidation, and corrosion, making it a dependable and durable material for applications in extreme heat conditions.
- Q: Can special steel be used in the chemical industry?
- Yes, special steel can be used in the chemical industry. Special steel, such as stainless steel and corrosion-resistant alloys, are often preferred in the chemical industry due to their high resistance to corrosion, heat, and chemical reactions. These qualities make special steel suitable for various applications including storage tanks, pipelines, reactors, and other equipment used in the production and handling of chemicals.
- Q: How does special steel ensure dimensional stability?
- Special steel ensures dimensional stability through a combination of factors such as controlled composition, precise heat treatment, and careful manufacturing processes. The specific composition of special steel is designed to have a lower coefficient of thermal expansion, which means it expands and contracts less with changes in temperature compared to regular steel. This ensures that the dimensions of the steel remain stable even under varying temperature conditions. Additionally, the heat treatment process further enhances the dimensional stability by refining the microstructure and reducing internal stresses. The careful manufacturing processes, including precise machining and quality control, also contribute to maintaining dimensional stability in special steel products.
- Q: What are the different forging techniques for special steel?
- For special steel, different forging techniques can be utilized depending on the desired properties and characteristics of the final product. Some commonly employed techniques are as follows: 1. Open-die forging, also known as smith forging or hand forging, involves shaping the steel between two flat dies or anvils. The metal is heated and hammered repeatedly until it achieves the desired shape. This technique is suitable for larger and more intricate components like shafts, cylinders, or discs. 2. Closed-die forging, also called impression-die forging, entails shaping the steel within a set of dies that contain the desired shape. The metal is placed between the dies and compressed under high pressure. Closed-die forging is often used for smaller, more intricate components, providing greater control over the final shape and dimensions. 3. Roll forging involves passing the steel between two or more rotating rolls to shape it. The rolls exert pressure on the metal, causing it to deform and acquire the desired shape. This technique is commonly used for producing long, cylindrical components such as axles, bars, or rings. 4. Upset forging involves deforming the steel by reducing its length and increasing its cross-sectional area. The metal is placed between two dies and axially compressed, resulting in bulging and the desired shape. Upset forging is commonly utilized for producing short, thick components like bolts, screws, or nuts. 5. Press forging, similar to closed-die forging, employs a hydraulic or mechanical press to shape the steel. The metal is placed between two dies and compressed under high pressure, allowing controlled deformation. Press forging enables precise control over the shaping process and is often employed for producing high-quality and complex components. Each of these forging techniques possesses its own advantages and limitations, and the choice of technique relies on factors such as size, complexity, and desired properties of the final product. By selecting the appropriate forging technique, manufacturers can ensure that special steel components meet the required specifications and performance standards.
- Q: How does special steel perform in terms of weldability?
- Special steel generally performs well in terms of weldability. It is specifically designed to have good weldability characteristics, which means it can be easily welded without much difficulty or the need for specialized welding techniques. This makes it a preferred choice for many welding applications, as it allows for efficient and reliable joining of different components or structures.
- Q: What are the challenges in working with special steel?
- Working with special steel presents several unique challenges compared to working with regular steel. Here are some of the main challenges one may encounter when working with special steel: 1. High cost: Special steels often have higher production costs due to their unique composition and properties. The raw materials used in their production may be rare or require complex manufacturing processes, leading to increased costs. 2. Limited availability: Special steels are not as widely available as regular steels, making it more challenging to source them. This limited availability can lead to longer lead times and potentially higher costs when trying to procure the necessary materials. 3. Complexity in machining: Special steels can be difficult to machine due to their high hardness or toughness. Their unique properties may cause excessive tool wear, leading to increased machining time and costs. Specialized cutting tools and machining techniques may be required to overcome these challenges. 4. Heat treatment requirements: Special steels often require precise and specific heat treatment processes to achieve the desired mechanical properties. The complexity of heat treatment can be a challenge, as it requires careful control of temperature, time, and cooling rates. Improper heat treatment can lead to inconsistent material properties or even material failure. 5. Weldability issues: Some special steels may have poor weldability compared to regular steels. They may be prone to cracking or require preheating and post-weld heat treatment to ensure proper joint integrity. This can add complexity and cost to welding processes. 6. Corrosion resistance: While special steels may possess excellent mechanical properties, they can sometimes be more susceptible to corrosion compared to regular steels. This requires additional measures to protect the steel from corrosion, such as applying protective coatings or using corrosion-resistant alloys. 7. Knowledge and expertise: Working with special steels often demands a higher level of technical knowledge and expertise. The unique properties and characteristics of these materials require a deep understanding of their behavior and how to effectively work with them. This may require specialized training or collaboration with experts in the field. Despite these challenges, working with special steel can also offer various benefits, such as superior strength, durability, and performance in specific applications. By understanding and addressing these challenges, engineers and manufacturers can harness the unique properties of special steel to develop innovative and high-quality products.
- Q: How does special steel perform in renewable energy applications?
- Special steel performs exceptionally well in renewable energy applications due to its unique properties and characteristics. It offers high strength, durability, and corrosion resistance, making it ideal for withstanding the harsh environmental conditions typically found in renewable energy projects. Special steel is commonly used in wind turbine components, solar panel frames, hydroelectric power plant infrastructure, and geothermal power systems. Its superior mechanical properties ensure efficient energy generation and long-term performance, contributing to the overall success and sustainability of renewable energy applications.
- Q: Can special steel be used in the printing industry?
- Yes, special steel can be used in the printing industry. It is commonly used in the manufacturing of printing machinery, such as printing presses, due to its high strength, durability, and resistance to wear and tear. Special steel components can help enhance the precision, reliability, and efficiency of printing processes, resulting in improved print quality and productivity.
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Gr40 Ribbed High Quality Steel Rebar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 170 m.t.
- Supply Capability:
- 500000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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