Hot Rolled Steel Bar AISI 4140 Steel Bar
- 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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Item specifice
Type:
Alloy Steel
Shape:
Steel Round Bar
Hot Rolled Steel Bar AISI 4140 Steel Bar
Product Information:
1:hot rolled steel bar 4140/ SCM440/4130/1045
2:size:20-250mm
3: length:5.8-6m,black surface
4:high quality,competitive price
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:
Our Advantages:
· Industry experience over 20 years.
· Shipment of goods -More than 70 countries worldwide.
· The most convenient transport and prompt delivery.
· Competitive price with best service.
· High technical production line with top quality products.
· High reputation based on best quality products.
With our experienced, enthusiastic and dynamic staffs, we assure to bring you the products with best quality, reasonable prices and good after-sales services under the motto: Friends First, Business After.
Communication, Experience, Expertise and Best efforts are our Promises to you.
- Q:How is shock-resistant steel used in the production of impact tools?
- Shock-resistant steel is used in the production of impact tools because it has enhanced toughness and can withstand the high impact forces generated during use. This steel is specifically engineered to absorb and distribute the shock and vibrations produced when the tool strikes an object, reducing the risk of breakage and increasing the tool's overall lifespan.
- Q:How does special steel contribute to the medical industry?
- Special steel contributes to the medical industry by providing the necessary materials for the production of medical equipment and devices. Its unique properties such as high strength, corrosion resistance, and biocompatibility make it ideal for manufacturing surgical instruments, implants, and prosthetics. Special steel also ensures the safety and effectiveness of medical tools, as it can withstand sterilization processes and maintain its integrity during procedures. Overall, special steel plays a crucial role in advancing medical technology and improving patient care.
- Q:What are the different methods for improving the fatigue strength of special steel?
- There are various ways to enhance the fatigue strength of special steel: 1. Heat treatment is a commonly used approach, involving processes like annealing, quenching, and tempering. These treatments refine the steel's microstructure, reduce impurities, and boost fatigue resistance. 2. Surface treatments, such as shot peening and nitriding, can also enhance fatigue strength. Shot peening bombards the steel surface with small metal particles, inducing compression stress that prevents crack formation and propagation. Nitriding diffuses nitrogen into the surface layer, creating a hard and wear-resistant nitride layer that improves fatigue resistance. 3. Alloying special steel with specific elements, like chromium, molybdenum, or vanadium, can significantly improve fatigue strength. These elements form carbides or nitrides, acting as barriers against crack propagation. 4. Applying protective surface coatings, like electroplating, hot-dip galvanizing, or physical vapor deposition (PVD), can enhance fatigue strength. These coatings act as barriers against environmental factors that may cause corrosion or surface damage, ultimately extending the steel's fatigue life. 5. Grain refinement can be achieved through processes like severe plastic deformation or equal channel angular pressing (ECAP). By refining the grain size, the steel's fatigue strength can be improved, as fine-grained steels have higher resistance to crack initiation and propagation. 6. Residual stress management plays a crucial role in enhancing fatigue strength. Techniques like stress relieving or shot peening can reduce tensile residual stresses, which are detrimental to fatigue resistance. It's important to consider specific requirements, the type of special steel, and the intended application when selecting the most suitable method for improving fatigue strength.
- Q:What are the different non-metallic inclusions in special steel?
- The different non-metallic inclusions commonly found in special steel include oxides, sulfides, nitrides, and carbides. These inclusions can have various shapes and sizes, and their presence can significantly affect the mechanical properties and performance of the steel.
- Q:How does special steel perform in extreme pressure conditions?
- Special steel is specifically designed to perform exceptionally well in extreme pressure conditions. Due to its unique composition and manufacturing process, special steel exhibits high strength, durability, and resistance to deformation, making it ideal for applications where extreme pressures are involved. When subjected to extreme pressure conditions, special steel is able to maintain its structural integrity without undergoing significant deformations. This is due to its high tensile strength, which enables it to withstand tremendous forces without breaking or bending. Additionally, the special steel's hardness and toughness allow it to resist wear and damage caused by the intense pressure. Furthermore, special steel possesses excellent heat resistance, which is crucial in extreme pressure conditions where elevated temperatures are often present. The steel's ability to withstand high temperatures without losing its mechanical properties ensures its reliability and effectiveness even under the most demanding circumstances. Moreover, special steel has excellent corrosion resistance properties, making it suitable for use in extreme pressure conditions where exposure to corrosive substances is a concern. The steel's resistance to oxidation and other chemical reactions prevents it from deteriorating or weakening, ensuring its long-term performance and reliability. Overall, special steel performs exceptionally well in extreme pressure conditions due to its high strength, durability, resistance to deformation, heat resistance, and corrosion resistance. These properties make it a reliable and efficient choice for various industries and applications that operate under extreme pressure environments, such as oil and gas exploration, aerospace, automotive, and heavy machinery manufacturing.
- Q:What are the different methods of surface cleaning for special steel?
- Special steel can be cleaned using various methods, each with its own benefits and uses. Some commonly used methods include: 1. Mechanical Cleaning: To eliminate dirt, rust, or other impurities from the steel surface, mechanical tools like wire brushes, sandpaper, or abrasive pads are employed. This method is effective for light to moderate contamination and is often used as a preliminary step before other cleaning methods. 2. Chemical Cleaning: Specific chemicals or cleaning agents are used to dissolve or loosen contaminants on the special steel surface. These chemicals can be applied by brushing, spraying, or immersion. Acid-based cleaners are commonly used for removing scale, rust, or oxide deposits, while alkaline cleaners are effective for eliminating oils, greases, or organic residues. 3. Electrochemical Cleaning: Electrochemical reactions are utilized to eliminate surface contaminants from special steel. This method involves applying an electric current and an electrolyte solution to dissolve or dislodge dirt, rust, or other deposits. It is particularly useful for cleaning intricate or hard-to-reach areas on the steel surface. 4. Ultrasonic Cleaning: High-frequency sound waves in a liquid medium are used to agitate and remove contaminants from the special steel surface. This method is highly effective for eliminating fine particles, oils, greases, or other organic residues from complex or delicate surfaces. 5. High-pressure Water Jetting: A concentrated stream of pressurized water is employed to remove contaminants from the special steel surface. This method is particularly useful for eliminating heavy deposits, coatings, or paints from large areas. The pressure levels can be adjusted to accommodate different degrees of surface contamination. It is important to consider factors such as the type and extent of contamination, the condition of the steel surface, the desired level of cleanliness, and the specific requirements of the application when choosing a surface cleaning method for special steel. Consulting with experts or professionals in the field is recommended to determine the most suitable method for a given situation.
- Q:What are the different types of high-strength steel?
- There are several different types of high-strength steel, including advanced high-strength steels (AHSS), ultra-high-strength steels (UHSS), and microalloyed steels. AHSS are specifically designed to provide improved strength and formability, making them suitable for automotive applications. UHSS have even higher strength levels than AHSS and are often used in applications where weight reduction and crashworthiness are critical, such as in the aerospace industry. Microalloyed steels are a type of high-strength steel that use small amounts of alloying elements to achieve increased strength and toughness.
- Q:How does special steel contribute to the aerospace defense machinery industry?
- Special steel plays a crucial role in the aerospace defense machinery industry by providing exceptional strength, durability, and resistance to corrosion and high temperatures. It is used extensively in the manufacturing of various components such as landing gears, turbine blades, structural frames, and armor plating for military aircraft and defense systems. Its unique properties ensure optimal performance, safety, and reliability of these critical machines, enabling them to withstand challenging environments and extreme operating conditions.
- Q:Can special steel be used for tooling applications?
- Yes, special steel can be used for tooling applications. Special steel, such as high-speed steel or tool steel, is specifically designed to have superior hardness, wear resistance, and toughness, making it highly suitable for tooling applications where durability and precision are crucial.
- Q:What are the advantages of using special steel in the renewable energy sector?
- Special steel offers several advantages when used in the renewable energy sector. Firstly, it provides enhanced strength and durability, allowing for the construction of robust and reliable components such as wind turbine towers and solar panel frames. This ensures prolonged operational life and increased resistance to harsh environmental conditions. Additionally, special steel exhibits excellent corrosion resistance, making it suitable for offshore wind farms and solar installations in coastal areas. Moreover, this type of steel can withstand extreme temperatures, enabling its use in concentrated solar power plants and geothermal energy systems. Overall, the use of special steel in the renewable energy sector enhances performance, extends lifespan, and improves the efficiency of renewable energy infrastructure.
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Hot Rolled Steel Bar AISI 4140 Steel Bar
- 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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