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
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Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
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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: What are the requirements for special steel used in electronic components?
- The special steel used in electronic components must meet specific and strict requirements. To begin with, it needs to have excellent electrical conductivity in order to effectively transmit electrical signals within the components. This is crucial for the proper functioning and performance of electronic devices. Furthermore, the steel used in electronic components must possess high resistance to corrosion in order to protect the components from environmental factors such as moisture, humidity, and exposure to chemicals. Corrosion can cause the deterioration and failure of electronic components, so the steel must be able to withstand these potential hazards. Another important requirement is that the special steel should have low magnetic permeability. Magnetic interference can have a negative impact on the performance of electronic components, particularly in sensitive devices like microchips. Therefore, the steel used in electronic components should have minimal magnetic properties to avoid any interference with the operation of the components. Moreover, the steel must have good thermal conductivity to efficiently dissipate the heat generated within the electronic components. This is particularly crucial in devices that generate a significant amount of heat, as inadequate thermal conductivity can lead to overheating and potential damage to the components. Lastly, the special steel used in electronic components should have high strength and durability to ensure long-lasting and reliable performance. The components are often subjected to mechanical stress, vibrations, and other external forces, so the steel must have the necessary strength to withstand these conditions without deforming or failing. In conclusion, the requirements for special steel used in electronic components include excellent electrical conductivity, high corrosion resistance, low magnetic permeability, good thermal conductivity, and high strength and durability. Meeting these requirements is crucial for achieving optimal performance and durability of electronic devices.
- Q: How does special steel perform in terms of impact resistance?
- Special steel generally performs well in terms of impact resistance. It is specifically engineered to have higher toughness and strength, allowing it to withstand impacts and deformations without fracturing or breaking easily. This makes special steel an excellent choice for applications that require durability and protection against sudden forces or impacts, such as in manufacturing machinery, construction equipment, and automotive components.
- Q: How does special steel perform in high-vibration environments?
- Special steel performs well in high-vibration environments due to its exceptional strength, durability, and ability to dampen vibrations. Its unique composition and heat treatment make it highly resistant to fatigue, reducing the risk of fractures or failures caused by constant vibrations. Additionally, special steel's excellent hardness and toughness properties allow it to maintain its structural integrity and performance even under severe vibration conditions.
- Q: How does special steel contribute to the oil and gas industry?
- Special steel plays a crucial role in the oil and gas industry by providing strength, corrosion resistance, and durability to equipment and infrastructure. It is used in the construction of pipelines, drill pipes, wellheads, valves, and various other components. The unique properties of special steel enable it to withstand harsh operating conditions, high pressures, and corrosive environments, ensuring the reliability and safety of oil and gas operations.
- Q: How does special steel perform in cryogenic strength?
- The excellent performance of special steel in cryogenic strength is well-known. Cryogenic strength refers to a material's capacity to endure extremely low temperatures while retaining its mechanical properties. Specifically engineered special steels, including stainless steels and nickel-based alloys, exhibit exceptional strength, toughness, and resistance to cracking at cryogenic temperatures. The special steel's distinctive composition and microstructure enable it to maintain its structural integrity and mechanical properties even under extremely cold conditions. These materials are designed to endure thermal stresses and brittleness that may occur at cryogenic temperatures, ensuring their reliability and performance in various applications. The critical importance of special steel's ability to excel in cryogenic strength is evident in industries such as aerospace, energy, and gas processing, where components are exposed to extremely low temperatures. For instance, the aerospace industry utilizes special steel in the construction of cryogenic fuel tanks and rocket engines, where it must withstand the extreme cold of space. Moreover, special steel's cryogenic strength proves advantageous in applications like liquefied natural gas (LNG) storage and transportation. The low temperatures involved in LNG processes necessitate materials that can endure thermal stresses while maintaining their strength and toughness. To summarize, special steel's unique composition and microstructure contribute to its exceptional performance in cryogenic strength. Its ability to endure extremely low temperatures without sacrificing mechanical properties makes it a reliable choice for applications in industries where cryogenic conditions are prevalent.
- Q: What is the significance of vanadium in special steel?
- Vanadium is a significant element in special steel due to its unique properties and effects on the steel's performance. Special steel refers to high-quality, high-performance steel that is designed for specific applications where strength, durability, and other specific characteristics are required. One of the main reasons vanadium is used in special steel is its ability to increase the strength and toughness of the steel. Vanadium forms very strong carbides within the steel's microstructure, which help to prevent grain growth and improve the steel's resistance to deformation and cracking. This makes the steel highly suitable for applications that require excellent strength, such as in the construction of bridges, high-rise buildings, and machinery. In addition to strength, vanadium also enhances the hardenability of the steel. Hardenability is the ability of the steel to be hardened through heat treatment processes, such as quenching and tempering. Vanadium increases the hardenability of the steel, allowing it to be easily hardened to achieve the desired properties, such as increased wear resistance and improved cutting performance. This makes vanadium-containing special steel ideal for tools, dies, and other applications that require hardness and wear resistance. Furthermore, vanadium contributes to the steel's corrosion resistance. It forms stable oxide layers on the surface of the steel, which act as a protective barrier against corrosion and oxidation. This is particularly beneficial in environments where the steel is exposed to harsh conditions, such as marine environments or chemical processing plants. Moreover, vanadium also improves the heat resistance and thermal stability of special steel. It helps to retain the steel's strength and hardness at elevated temperatures, making it suitable for applications that involve high-temperature environments, such as aerospace components and automotive engine parts. Overall, the significance of vanadium in special steel lies in its ability to enhance the steel's strength, toughness, hardenability, corrosion resistance, and heat resistance. These properties make vanadium-containing special steel highly sought after in various industries where exceptional performance and reliability are required.
- Q: How does special steel perform under extreme temperatures?
- Special steel is designed to perform exceptionally well under extreme temperatures. It has high heat resistance, maintaining its strength and structural integrity even when exposed to extreme heat or cold. This makes it suitable for various applications, such as in aerospace, automotive, and power generation industries, where it can withstand the demanding conditions of extreme temperatures without compromising its performance.
- Q: What are the main factors affecting the machinability of special steel?
- Several key factors influence the machinability of special steel, which refers to its ease of cutting, shaping, and forming. 1. The chemical composition of special steel plays a crucial role in its machinability. Elements like carbon, chromium, nickel, and molybdenum can significantly impact the material's hardness, toughness, and cutting properties. For instance, higher carbon content can increase steel's hardness, making it more difficult to machine. 2. The hardness of special steel is a critical factor in determining its machinability. Harder steels require more cutting force and generate more heat during machining, leading to increased tool wear and reduced efficiency. On the other hand, softer steels are generally easier to machine but may result in lower tool life. 3. The heat treatment process applied to special steel can greatly influence its machinability. Treatments like annealing, tempering, or quenching can alter the steel's microstructure and mechanical properties, affecting how it responds to cutting forces. Proper heat treatment can improve machinability by reducing hardness and increasing toughness. 4. The size and distribution of grains within the steel also impact its machinability. Fine-grained steel tends to have better machinability compared to coarse-grained steel, as smaller grains offer more uniform cutting conditions and reduce the risk of tool damage. 5. Machining parameters, including cutting speed and feed rate, directly affect the machinability of special steel. Higher cutting speeds can increase tool wear and generate excessive heat, affecting surface finish and dimensional accuracy. Similarly, incorrect feed rates can cause chip formation problems, resulting in poor machinability. 6. The choice of cutting tool material and geometry is crucial for achieving optimal machinability. Different tool materials, like carbide or high-speed steel, have varying wear resistance and cutting properties. The tool geometry, including rake angle and clearance angle, also affects chip formation, cutting forces, and heat generation. 7. Adequate lubrication and cooling during machining are essential to enhance machinability. Lubricants or coolants help reduce friction and heat, prolong tool life, and improve chip evacuation. Additionally, they prevent workpiece deformation and improve surface finish. Considering these factors, it is important to carefully select the appropriate special steel grade, optimize machining parameters, and use suitable cutting tools and lubrication to achieve the desired machinability and maximize productivity.
- Q: How is special steel used in the production of springs?
- Special steel is used in the production of springs due to its unique properties that make it ideal for withstanding high stress and maintaining elasticity. The high strength and excellent fatigue resistance of special steel allow springs to endure repetitive loading without deformation or failure. Additionally, the specific composition of special steel can be tailored to meet desired characteristics such as corrosion resistance, heat resistance, or electrical conductivity, making it highly versatile for various spring applications across industries.
- Q: What are the different surface protection methods for special steel?
- There are several surface protection methods available for special steel, each with its own advantages and applications. Here are some of the most common methods: 1. Coating: Coating is a widely used method to protect the surface of special steel. This can involve applying a layer of paint, powder coating, or electroplating. Coatings provide a barrier between the steel and the environment, preventing corrosion and enhancing the aesthetics of the steel surface. 2. Galvanization: Galvanization involves coating the special steel with a layer of zinc through a process called hot-dip galvanizing. This method provides excellent corrosion resistance and is commonly used for outdoor structures and equipment exposed to harsh environments. 3. Passivation: Passivation is a chemical process that removes surface contaminants and forms a protective oxide layer on the special steel's surface. This method improves the steel's resistance to corrosion and is often used for stainless steel. 4. Nitriding: Nitriding is a heat-treatment process that diffuses nitrogen into the surface of the special steel, forming a hard and wear-resistant layer. This method enhances the steel's durability, resistance to fatigue, and corrosion resistance, making it suitable for applications involving heavy loads or abrasive environments. 5. PVD and CVD coatings: Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD) are methods used to deposit thin films of various materials onto the special steel surface. These coatings can provide enhanced hardness, wear resistance, and low friction properties, making them ideal for cutting tools, molds, and high-performance applications. 6. Shot peening: Shot peening is a mechanical surface treatment method that involves bombarding the special steel surface with small spherical particles. This process induces compressive stresses in the steel, improving its fatigue life, resistance to stress corrosion cracking, and wear resistance. 7. Anodizing: Anodizing is a process used primarily for aluminum, but it can also be applied to some special steel alloys. By creating an oxide layer on the surface, anodizing improves corrosion resistance and allows for the application of decorative finishes. Each of these surface protection methods offers unique properties and benefits, and the choice of method depends on the specific requirements of the special steel application.
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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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