Hot Rolled Steel Bar AISI 4140 Steel Bar
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- 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
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 does special steel contribute to the oil and gas industry?
- Special steel plays a crucial role in the oil and gas industry by offering enhanced strength, durability, and corrosion resistance needed for various applications. It is used in the construction of pipelines, drilling equipment, storage tanks, and offshore platforms, ensuring reliable and safe operations in harsh environments. Additionally, special steel's high heat resistance enables it to withstand extreme temperatures in refining processes, while its resistance to cracking and wear ensures the longevity of critical components. Overall, special steel contributes significantly to the oil and gas industry by providing the necessary materials for efficient and secure exploration, production, and transportation of oil and gas resources.
- Q:What are the disadvantages of using special steel?
- One disadvantage of using special steel is its higher cost compared to regular steel. Special steel typically requires additional alloying elements and manufacturing processes, making it more expensive to produce. Additionally, special steel may have limited availability and require specialized knowledge and equipment for fabrication and handling.
- Q:How is high-speed stainless steel used in the production of machining tools?
- High-speed stainless steel is commonly used in the production of machining tools due to its excellent heat resistance, hardness, and corrosion resistance. This type of stainless steel can withstand high temperatures generated during machining operations without losing its strength. It helps in enhancing the tool's cutting performance, improving its lifespan, and reducing wear and tear. Additionally, high-speed stainless steel is also preferred for its ability to resist the corrosive effects of various chemicals and environments, making it suitable for a wide range of machining applications.
- Q:How does special steel contribute to the creep resistance of products?
- Special steel contributes to the creep resistance of products through its unique properties and composition. Creep is the gradual deformation of a material under constant stress over time, and it is a critical concern in industries that require high temperatures and prolonged usage. Special steel, also known as high-temperature steel or heat-resistant steel, is specifically designed to withstand these extreme conditions and minimize creep. One of the key factors contributing to the creep resistance of special steel is its high melting point. Special steel is typically alloyed with elements such as chromium, nickel, molybdenum, and vanadium, which significantly increase its melting point compared to ordinary steel. This enhanced heat resistance allows special steel to maintain its structural integrity and resist deformation even at elevated temperatures. Moreover, the unique microstructure of special steel plays a crucial role in its creep resistance. Special steel is engineered to have a fine-grained structure, which improves its strength and prevents the movement of dislocations within the material. Dislocations are defects in the atomic arrangement of a material that can lead to creep deformation. By minimizing the movement of dislocations, special steel exhibits higher resistance to creep and maintains its shape and dimensional stability over extended periods. In addition to its microstructure, special steel often has a higher content of certain alloying elements. For instance, the addition of elements like molybdenum and vanadium enhances the creep strength of special steel by forming stable carbides within the material. These carbides act as barriers to dislocation movement, further impeding creep deformation and improving the overall creep resistance of the product. Furthermore, special steel is often subjected to advanced heat treatment processes, such as quenching and tempering, to optimize its mechanical properties and enhance its creep resistance. These heat treatments help to refine the microstructure, improve the distribution of alloying elements, and increase the hardness and strength of the material, all of which contribute to better resistance against creep. Overall, special steel's ability to withstand high temperatures, its unique microstructure, and its alloying elements and heat treatment processes combine to provide exceptional creep resistance. This makes special steel an ideal choice for various applications that require durability and longevity under extreme thermal conditions, such as gas turbines, nuclear reactors, high-temperature boilers, and aerospace components.
- 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 are the properties of aluminum alloys?
- Aluminum alloys possess several properties that make them highly desirable in various industries. These properties include lightweight, excellent corrosion resistance, high strength-to-weight ratio, good formability, and electrical conductivity. Additionally, aluminum alloys can be easily cast, machined, and welded, making them highly versatile in different applications.
- Q:How does molybdenum improve the performance of special steel?
- Molybdenum plays a crucial role in enhancing the performance of special steel due to its unique properties and characteristics. First and foremost, molybdenum significantly improves the strength and toughness of steel, making it more durable and resistant to deformation. This is achieved by forming a solid solution with iron, which results in a fine-grained microstructure and reduces the formation of brittle phases in the steel. Moreover, molybdenum increases the hardenability of steel, allowing it to be heat-treated to obtain desired mechanical properties. This is particularly important in the production of special steel, where high strength, wear resistance, and thermal stability are often required. By enabling effective heat treatment, molybdenum ensures that the steel can be processed to meet specific performance requirements, such as hardness, toughness, and dimensional stability. Additionally, molybdenum enhances the corrosion resistance of special steel, making it suitable for various challenging environments. It forms a protective oxide layer on the surface of the steel, which acts as a barrier against corrosive substances like acids, alkalis, and salts. This resistance to corrosion is crucial in applications where the steel is exposed to harsh conditions, such as marine environments, chemical processing plants, and oil and gas industries. Furthermore, molybdenum improves the high-temperature strength and creep resistance of special steel. It enables the steel to maintain its mechanical properties even at elevated temperatures, making it suitable for applications where the steel is subject to prolonged exposure to heat or mechanical stress. In summary, molybdenum plays a vital role in enhancing the performance of special steel by improving its strength, toughness, hardenability, corrosion resistance, and high-temperature properties. These attributes make molybdenum an essential alloying element in the production of special steel for various industries, including automotive, aerospace, energy, and tool manufacturing.
- Q:How does heat treatment affect the properties of special steel?
- Heat treatment can significantly impact the properties of special steel. By subjecting the steel to controlled heating and cooling processes, the structure and composition of the steel can be altered, resulting in changes to its hardness, strength, toughness, and other mechanical properties. Heat treatment can also improve the steel's resistance to wear, corrosion, and fatigue, making it more suitable for specific applications.
- Q:What are the main advantages of using special steel in the automotive racing industry?
- The main advantages of using special steel in the automotive racing industry include its high strength-to-weight ratio, superior durability, and improved performance. Special steel alloys offer increased tensile strength and toughness, allowing for lighter and more rigid components, which contribute to higher speeds and improved handling. Additionally, special steel's resistance to wear and fatigue ensures better reliability and longevity of critical parts, reducing the risk of failures and costly repairs.
- Q:What are the main environmental impacts of special steel production?
- The main environmental impacts of special steel production include emissions of carbon dioxide (CO2) and other greenhouse gases, energy consumption, deforestation (for charcoal used in the production process), water pollution (from the disposal of waste materials and chemicals), and habitat destruction due to mining activities. Additionally, the extraction and processing of raw materials for special steel production, such as iron ore and coal, can contribute to land degradation and ecosystem disruption.
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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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