Special Steel Scm440 Aisi 4140 Steel CNBM
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
Special Steel Scm440 Aisi 4140 Steel CNBM
Product Description:
1.Dia: 10mm-300mm
2.Length: 3000mm-12000mm
3.Process: EAF + LF + VD + Forged + Heat Treatment (optional)
4.Delivery condition: Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)
5.Forged ratio: no less than 3:1
6.Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing
7.Test: ultrasonic test according to SEP 1921-84 3C/c
8.Material details will be as per agreed technical specifications
9.Certificate of Quality: issued in English, in addition the normal terms
Chemical Composition:
GB | AISI | JIS | DIN | C | Si | Mn | Cr | Mo |
27SiMn | - | - | - | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.3 | 0.10-0.15 |
40Cr | 5140 | SCM440 | 41Cr4 | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.10 | 0.10-0.15 |
35CrMo | 4135 | SCM435 | 34CrMo4 | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.15-0.25 |
42CrMo | 4140 4142 | SCM440 | 42CrMo4 | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 |
Application:
scm440 hot rolled round bars and forged round bars used in the manufacture of requirements higher than
35 crmo steel strength and conditioning section larger forgings, such as locomotive traction with the big gear,
supercharger drive gear, pressure vessel gear.
Product Show:
- Q: What are the different methods of improving the creep resistance of special steel?
- To enhance the creep resistance of special steel, various methods can be employed. These methods aim to improve its ability to withstand high temperatures and constant stress over a long period of time. Commonly used techniques include: 1. Alloying: By adding specific elements like chromium, molybdenum, tungsten, and vanadium, the creep resistance of special steel can be significantly enhanced. These alloying elements form strong carbides or intermetallic compounds that impede dislocation movement, thereby increasing the material's strength and resistance to creep. 2. Heat treatment: Precise heat treatment techniques, such as quenching and tempering, annealing, and normalizing, can be employed to improve the creep resistance of special steel. These processes alter the microstructure of the steel, resulting in the formation of fine-grained and homogeneous structures that offer better creep resistance. Heat treatment also helps in relieving residual stresses and enhancing the overall strength of the material. 3. Grain refinement: Special steel can undergo processes that refine its grain structure, thereby improving its creep resistance. Techniques like controlled rolling, recrystallization, and severe plastic deformation can reduce the grain size and make it more uniform. This refined microstructure hinders dislocation movement and enhances the material's resistance to creep deformation. 4. Precipitation hardening: Special steel can be subjected to precipitation hardening methods, where it is heated and then rapidly cooled to induce the formation of fine precipitates. These precipitates act as barriers to dislocation movement, thereby improving the material's strength and creep resistance. 5. Surface modification: Surface modification techniques, such as shot peening, laser surface melting, and surface coatings, can be applied to increase the creep resistance of special steel. These methods improve the surface integrity, reduce roughness, and introduce compressive residual stresses, all of which contribute to enhanced creep resistance. It is important to consider the specific requirements of the application and the type of special steel being used when selecting and combining these methods. The goal is to optimize the material's microstructure, chemical composition, and surface characteristics in order to achieve the desired creep resistance and ensure long-term performance at elevated temperatures.
- Q: How does special steel perform in radiation shielding applications?
- Special steel is renowned for its outstanding performance in shielding against radiation, widely recognized for its unique properties and composition. It is an ideal choice in safeguarding against harmful radiation due to its exceptional qualities. One significant advantage of special steel is its remarkable density, which allows for the effective absorption and attenuation of radiation. This attribute enables it to serve as a barrier, effectively preventing the penetration of harmful radiation into sensitive areas. By significantly reducing radiation exposure, special steel plays a crucial role in diverse industries, including nuclear power plants, medical facilities, and aerospace applications. Furthermore, special steel possesses excellent mechanical strength and durability, ensuring long-lasting and reliable radiation shielding. It can withstand extreme conditions while maintaining its effectiveness over time. This durability is particularly vital in environments with continuous or ongoing radiation exposure. Moreover, special steel exhibits high resistance to corrosion and degradation, making it indispensable in radiation shielding applications. This resistance ensures the material remains intact and can provide the necessary protection against radiation for an extended period. As a result, frequent maintenance and replacement are minimized, leading to cost savings and improved operational efficiency. Additionally, special steel can be customized to meet specific requirements, allowing for tailored designs and configurations. This flexibility enables the development of radiation shielding solutions optimized for the unique needs of various applications. Whether it involves shielding panels, containers, or enclosures, special steel can be adapted to provide the most efficient and effective radiation protection. In summary, special steel excels in radiation shielding applications due to its high density, mechanical strength, durability, corrosion resistance, and customization capabilities. It offers reliable and long-lasting radiation protection, ensuring the safety of personnel and equipment in industries where radiation exposure is a concern.
- 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 contribute to the power generation industry?
- Special steel plays a crucial role in the power generation industry by providing the necessary strength, durability, and resistance to extreme conditions. It is used in the manufacturing of various components such as turbine blades, boilers, and heat exchangers, which are essential for generating electricity. Additionally, special steel alloys offer excellent corrosion resistance, ensuring the longevity and reliability of power plants.
- Q: How is special steel used in the production of valves and fittings?
- Special steel is commonly used in the production of valves and fittings due to its high strength, corrosion resistance, and ability to withstand extreme temperatures and pressure conditions. It provides durability and reliability, ensuring the efficient functioning of valves and fittings in various industries such as oil and gas, petrochemical, and power generation. Additionally, special steel's malleability allows for intricate shaping and precision manufacturing, enabling the production of valves and fittings with complex designs and tight tolerances.
- Q: Can special steel be used for nuclear power plant components?
- Yes, special steel can be used for nuclear power plant components. Nuclear power plants require materials that can withstand high temperatures, pressure, and radiation exposure. Special steel, also known as stainless steel, possesses excellent corrosion resistance, high strength, and good mechanical properties, making it suitable for various components such as reactor vessels, steam generators, and piping systems in nuclear power plants. Additionally, special steel's ability to maintain its integrity under harsh conditions minimizes the risk of failure and ensures the safety and reliability of nuclear power plants.
- Q: What are the applications of special steel in the automotive supply chain?
- Special steel has various applications in the automotive supply chain. It is commonly used in the production of critical components such as engine parts, axles, gears, and suspension systems. Special steel provides high strength, durability, and corrosion resistance, contributing to improved performance and safety in vehicles. Additionally, it enables weight reduction, enhancing fuel efficiency and reducing emissions. Overall, special steel plays a crucial role in enhancing the reliability, efficiency, and sustainability of the automotive industry.
- Q: How is special steel used in the textile industry?
- Special steel is used in the textile industry for various applications such as manufacturing textile machinery, fabricating cutting tools, and producing components for textile production processes. It provides the necessary strength, durability, and precision required to handle the high-speed and high-pressure operations involved in textile manufacturing.
- Q: What are the different corrosion-resistant grades of special steel?
- There are several corrosion-resistant grades of special steel that are commonly used in various industries. These grades are specifically designed to resist corrosion and maintain their structural integrity in harsh environments. Some of the different corrosion-resistant grades of special steel are: 1. Stainless Steel: Stainless steel is one of the most popular corrosion-resistant grades and is widely used in various applications. It contains a minimum of 10.5% chromium, which forms a protective passive oxide layer on the surface, preventing corrosion. There are different types of stainless steel, such as austenitic, ferritic, and martensitic, each with varying levels of corrosion resistance. 2. Duplex Stainless Steel: Duplex stainless steel is a combination of austenitic and ferritic stainless steels, offering superior corrosion resistance compared to conventional stainless steel grades. It has a high chromium content, along with other alloying elements like molybdenum and nitrogen, which enhance its resistance to pitting, crevice corrosion, and stress corrosion cracking. 3. Super Duplex Stainless Steel: Super duplex stainless steel is an even higher corrosion-resistant grade than duplex stainless steel. It has a higher chromium and molybdenum content, providing excellent resistance to highly corrosive environments, such as seawater, chemicals, and acids. Super duplex stainless steel is commonly used in offshore oil and gas industries. 4. Nickel Alloys: Nickel alloys, such as Inconel and Hastelloy, are highly corrosion-resistant grades of special steel. These alloys have a high nickel content, along with other elements like chromium and molybdenum, which make them resistant to a wide range of corrosive environments, including high-temperature and acidic conditions. 5. Titanium Alloys: Titanium alloys are known for their exceptional corrosion resistance, especially in aggressive media, such as seawater and chemical processing environments. These alloys have a low density, high strength, and superior resistance to pitting, crevice corrosion, and stress corrosion cracking. 6. Aluminum Alloys: Certain aluminum alloys, such as 5052 and 6061, are also corrosion-resistant grades of special steel. These alloys have a protective oxide layer that forms on the surface, providing excellent resistance to atmospheric corrosion. Aluminum alloys are commonly used in marine and aerospace applications. These are just a few examples of the different corrosion-resistant grades of special steel. The selection of the appropriate grade depends on the specific corrosive environment, temperature, mechanical properties required, and other factors related to the intended application.
- Q: How does special steel perform in high-temperature strength?
- Special steel, also referred to as high-temperature steel, is engineered for superior performance in applications requiring high-temperature strength. Unlike standard steels, which can weaken and compromise structural integrity at elevated temperatures, special steel maintains its mechanical properties even in extreme heat conditions. The exceptional high-temperature strength of special steel stems from its distinctive composition. It is typically alloyed with elements like chromium, nickel, and molybdenum, significantly enhancing its resistance to thermal expansion, oxidation, and creep. These alloying elements form stable oxides on the steel's surface, creating a protective layer that prevents further oxidation and corrosion, thus preserving the material's strength and integrity. Furthermore, the microstructure of special steel is vital to its high-temperature performance. Through advanced manufacturing techniques, special steel is crafted with a fine-grained structure, enhancing its resistance to deformation and boosting its creep strength. The fine grains also contribute to its ability to retain mechanical properties at elevated temperatures for extended periods. Moreover, special steel undergoes rigorous heat treatment processes, such as quenching and tempering, which further enhance its high-temperature strength. These processes refine the microstructure and optimize the steel's mechanical properties, including hardness, toughness, and resistance to thermal fatigue. In conclusion, special steel is purposefully designed and engineered to excel in applications requiring high-temperature strength. Its unique composition, microstructure, and heat treatment processes contribute to its exceptional resistance to thermal expansion, oxidation, and creep, ensuring that it maintains its mechanical properties and structural integrity even under extreme heat conditions.
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Special Steel Scm440 Aisi 4140 Steel CNBM
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 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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