Steel Round Bar S355J2G3 Forged Round Steel
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
Steel Round Bar S355J2G3 Forged Round Steel
Product Information:
1.S355J2G3 forged round bar
2.size:280*5300mm
3.ut:sep1921-84D/d
4.heatreatment:annealed
5.straightness:2mm/m
6.Process: EAF+LF+VD (ESR furnace for optional)
7.Delivery condition: Hot forged, Heat-treatment (Normalized / Annealed / Quenched / tempered), Rough machining
8.Technical Data: Chemical Composition, Physical Properties and Mechanical Testing according to the customer's requirement
9.Test: Ultrasonic and magnetic test according to customer' require(EN or ASME and so on).
Product Overviews:
| Product Name | Typical Grades | Diameter(mm) | Standard adopted |
| Carbon Steel | 20 (1020/S20C/C22) | Ø16-Ø300 | GB/SAE/JIS/DIN |
| 40 (1040/S40C/C40) | |||
| 45 (1045/S45C/C45) | |||
| Bearing Steel | GCr9 (51100/SUJ1) | Ø12-Ø250 | |
| GCr15 (52100/SUJ2/100Gr6) | |||
| GCr9SiMn (A485-Gr.1/SUJ3) | |||
| Cr-Mo Steel | 20Cr (5120/SCr420H/20Cr4) | Ø12-Ø250 | |
| 40Cr (5140/SCr440/41Cr4) | |||
| 42CrMo(4140/SCM440/42CrMo4) | |||
| Gear Steel | 20CrNiMo | Ø16-Ø600 | |
| 20CrMn(5115/SMnC420/20MnCr5) | |||
| 20CrNiMo(8620/SNCM220/20CrMiMo2) |
Product Show:
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- Q: What are the different surface modification techniques used for special steel?
- There are several surface modification techniques used for special steel to enhance its properties and improve its performance in specific applications. Some of the common techniques include: 1. Nitriding: Nitriding is a surface hardening process that involves the diffusion of nitrogen into the steel surface. It forms a hard layer of nitrides, which significantly increases the surface hardness, wear resistance, and fatigue strength of the steel. 2. Carbonitriding: Carbonitriding is a similar process to nitriding, but it involves the diffusion of both carbon and nitrogen into the steel surface. This technique increases the surface hardness and also improves the wear resistance and fatigue strength of the steel. 3. Case hardening: Case hardening involves the addition of a hard, wear-resistant layer to the surface of the steel. This can be achieved through processes like carburizing or carbonitriding, where carbon is introduced into the surface layer, transforming it into a high-carbon martensitic layer. 4. Shot peening: Shot peening is a technique that involves bombarding the steel surface with small, high-velocity shots of media, such as steel, ceramic, or glass beads. This process induces compressive stresses on the surface, improving its fatigue strength and resistance to stress corrosion cracking. 5. Electroplating: Electroplating is a common technique used to apply a thin layer of metal coating onto the steel surface. This can be done with various metals like zinc, nickel, or chromium, providing protection against corrosion, improving aesthetics, and enhancing wear resistance. 6. Physical vapor deposition (PVD): PVD is a coating technique that involves depositing thin layers of material onto the steel surface through a vacuum process. This technique can be used to apply coatings like titanium nitride (TiN), which provides excellent wear resistance and reduces friction. 7. Laser surface modification: Laser surface modification techniques, such as laser hardening or laser alloying, use a high-energy laser beam to selectively heat and modify the steel surface. This process can improve hardness, wear resistance, and corrosion resistance. These surface modification techniques can be tailored to meet specific requirements, enhancing the properties of special steel for various applications in industries such as automotive, aerospace, and tooling.
- Q: What are the main characteristics of electrical steel?
- The main characteristics of electrical steel include high magnetic permeability, low electrical resistivity, and low hysteresis loss. It is specifically designed to efficiently conduct and transform electrical energy, making it ideal for use in transformers, motors, and generators.
- Q: What are the different methods of preventing hydrogen embrittlement in special steel?
- There are several methods that can be employed to prevent hydrogen embrittlement in special steel. 1. Proper material selection: Choosing the right type of steel with a lower susceptibility to hydrogen embrittlement can be an effective preventive measure. Steels with high strength and hardness are generally more susceptible to embrittlement, so opting for steels with lower alloy content or different composition can be beneficial. 2. Controlled heat treatment: Proper heat treatment processes can help reduce the risk of hydrogen embrittlement. Tempering and annealing at specific temperatures can relieve internal stresses and minimize the impact of hydrogen absorption. 3. Hydrogen mitigation techniques: Various techniques can be utilized to prevent or reduce the amount of hydrogen in the steel. These include preheating the steel before exposure to hydrogen, utilizing desorption methods such as vacuum annealing to remove trapped hydrogen, and employing hydrogen scavenger coatings or inhibitors that capture or neutralize the hydrogen. 4. Stress reduction: High levels of stress can increase the likelihood of hydrogen embrittlement. Implementing stress relief techniques such as shot peening or stress-relieving heat treatments can help reduce the potential for embrittlement. 5. Proper handling and storage: Hydrogen embrittlement can also occur during the manufacturing, handling, or storage stages. It is essential to ensure that the steel is protected from exposure to hydrogen-rich environments, such as during cleaning or pickling processes. Proper packaging and storage techniques, including the use of dry environments or protective coatings, can also help prevent hydrogen absorption. 6. Maintenance and inspection: Regular inspection and maintenance of the steel components can help identify any signs of hydrogen embrittlement at an early stage. This allows for timely repairs or replacements to prevent catastrophic failures. It is important to note that the specific method or combination of methods employed to prevent hydrogen embrittlement may vary depending on the specific application, the type of steel, and the environmental conditions it will be exposed to. Therefore, it is crucial to consult with experts and adhere to industry standards and guidelines to ensure effective prevention of hydrogen embrittlement in special steel.
- Q: Can special steel be used in the medical industry?
- Yes, special steel can be used in the medical industry. Special steel, specifically stainless steel, is commonly used in the manufacturing of medical devices and equipment due to its corrosion resistance, biocompatibility, and sterilization capabilities. It is used for surgical instruments, implants, prosthetics, and various other medical applications where durability, hygiene, and non-reactivity are essential.
- Q: What are the main advantages of using special steel in aerospace applications?
- The main advantages of using special steel in aerospace applications include its high strength-to-weight ratio, excellent corrosion resistance, and superior heat resistance. Special steel allows for the construction of lighter and more fuel-efficient aircraft, while still maintaining structural integrity under extreme conditions. Additionally, its resistance to corrosion and heat enables it to withstand the harsh environments and high temperatures experienced during flight.
- Q: What are the different methods of strengthening special steel?
- Special steel can be strengthened in various ways, each with its own benefits and uses. Heat treatment is a common method, involving heating the steel to a specific temperature and then cooling it rapidly or slowly, depending on the desired result. This can involve processes such as quenching, tempering, and annealing, which change the steel's microstructure to enhance its mechanical properties. Another method is alloying, where different elements are added to the steel to improve its strength. For instance, adding elements like chromium, nickel, or molybdenum can enhance the steel's resistance to corrosion, while vanadium or tungsten can increase its hardness and wear resistance. Cold working is another technique used to strengthen special steel, involving deforming the steel at room temperature through rolling, forging, or drawing. This aligns the steel's crystalline structure, boosting its strength and hardness. Moreover, surface treatments can be employed to enhance the strength of special steel. Techniques like carburizing, nitriding, or plating can introduce a hardened layer or coating on the steel's surface, improving its wear resistance and durability. Each method has its own advantages and can be customized to meet specific requirements and applications. By combining different strengthening techniques, special steel can be tailored to fulfill a wide range of industrial needs, making it a reliable and versatile material.
- Q: How does special steel contribute to the aerospace noise reduction?
- Special steel contributes to aerospace noise reduction by providing high strength and durability, which allows for the construction of lighter and more aerodynamic aircraft components. This reduces the overall weight of the aircraft, leading to decreased fuel consumption and noise emissions. Additionally, special steel's unique properties, such as its ability to dampen vibrations and resist corrosion, help to minimize the transmission of noise and vibrations throughout the aircraft structure, resulting in a quieter and more comfortable flying experience for passengers and crew.
- Q: How does special steel contribute to the aerospace fastener industry?
- Special steel contributes to the aerospace fastener industry by offering enhanced strength, durability, and resistance to extreme temperatures and corrosion. These properties make it a crucial material for manufacturing aerospace fasteners, which are essential for holding aircraft structures together. The high-performance nature of special steel ensures the reliability and safety of fasteners, ultimately contributing to the overall efficiency and success of the aerospace industry.
- Q: What are the different non-destructive testing techniques used for special steel?
- There are several non-destructive testing (NDT) techniques that are commonly used for special steel to ensure its quality and integrity without causing any damage. These techniques are essential in industries where special steel is used, such as aerospace, automotive, and construction, to ensure that the material meets the required specifications and standards. Some of the commonly used NDT techniques for special steel are: 1. Ultrasonic Testing (UT): This technique involves the use of high-frequency sound waves to detect internal flaws, such as cracks, voids, or inclusions, in special steel. UT is highly effective in detecting subsurface defects and is widely used due to its versatility and accuracy. 2. Magnetic Particle Testing (MT): MT is a technique that uses magnetic fields and iron particles to detect surface or near-surface defects in special steel. It is particularly useful in identifying defects like cracks, seams, or laps, as the magnetic particles will accumulate at these locations, making them visible under proper lighting conditions. 3. Liquid Penetrant Testing (PT): PT is a widely-used method for detecting surface defects in special steel. It involves applying a liquid penetrant to the surface of the material, which seeps into any surface cracks or defects. After a specified time, the excess penetrant is removed, and a developer is applied to make the defects visible. 4. Eddy Current Testing (ET): ET utilizes electromagnetic induction to detect surface or near-surface defects in special steel. It is particularly useful in detecting cracks, corrosion, or metal loss in conductive materials. ET is a fast and accurate method, making it suitable for high-speed production environments. 5. Radiographic Testing (RT): RT involves the use of X-rays or gamma rays to examine the internal structure of special steel. It can detect various defects, including porosity, inclusions, and cracks. RT provides detailed images that help identify the location, size, and severity of defects. 6. Visual Testing (VT): VT is a simple yet crucial technique that involves a visual examination of the surface of special steel. It helps identify surface defects like scratches, dents, or corrosion. Although VT is not as sensitive as other NDT techniques, it is often used as a preliminary inspection method. Each of these non-destructive testing techniques has its own advantages and limitations. The selection of the appropriate technique depends on factors such as the type and size of the special steel, the required inspection depth, and the specific defects that need to be detected. By using a combination of these techniques, manufacturers and inspectors can ensure the quality and reliability of special steel products.
- Q: How does special steel contribute to the manufacturing of valves and pumps?
- The manufacturing of valves and pumps heavily relies on special steel, which possesses exceptional strength, durability, and corrosion resistance properties. These properties make it highly suitable for these critical components. Valves and pumps play a vital role in various industrial processes, including oil and gas, chemical, and power generation industries. Their function is to control the flow of fluids or gases, ensuring efficient and safe operations. Special steel is used in these applications due to its ability to withstand extreme pressure, high temperatures, and aggressive chemicals. One of the primary advantages of special steel in valve and pump manufacturing is its strength. These components often operate under immense pressure, and ordinary steel may not possess the necessary strength to withstand these conditions. In contrast, special steel has enhanced tensile strength, enabling valves and pumps to endure high-pressure environments without deforming or failing. Corrosion resistance is another crucial aspect of special steel. Valves and pumps frequently come into contact with corrosive substances, such as saltwater, acids, or chemicals. Special steel is engineered to resist corrosion, preventing the degradation of these components and ensuring their longevity. By utilizing special steel, manufacturers can create valves and pumps that can withstand harsh environments and corrosive substances, reducing maintenance costs and downtime. Additionally, special steel offers excellent durability, which is essential for valves and pumps that need to operate continuously for extended periods. These components experience constant wear and tear due to fluid flow and pressure fluctuations. Special steel's resistance to fatigue and wear ensures that valves and pumps can function reliably and efficiently over time, minimizing the risk of breakdowns and extending the equipment's lifespan. In conclusion, special steel is indispensable in valve and pump manufacturing. Its exceptional strength, corrosion resistance, and durability properties make it an ideal material for these critical components. By utilizing special steel, manufacturers can produce valves and pumps that can withstand extreme conditions, resist corrosion, and operate reliably, contributing to safer and more efficient industrial processes.
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Steel Round Bar S355J2G3 Forged Round Steel
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 10000 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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