Alloy AISI 4140 Material Steel Round Bars
- 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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Item specifice
Type:
Alloy Steel
Shape:
Steel Round Bar
Alloy AISI 4140 Material Steel Round Bars
Product Description:
1.Dia:16-320mm
2.Length:4-12m(can be customized)
3.Proceesing :EAF+LF+VD
4.Inspection: Ultrasonic according to the test standards:SEP1921-84,GR.3 CLASS C/C
5. Packing situation: standard seaworthy packing or as customer required
6. Delivery time: 7 days for stock and 30 days for new production
7. Payment: T/T, or L/C at sight.
Chemical Composition:
Grade | C | Si | Mn | P | S | Cr | Mo |
42CrMo4 | 0.38-0.45 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.90-1.20 | 0.15-0.25 |
1.7225 | 0.38-0.45 | ≤0.40 | 0.60-0.90 | ≤0.025 | ≤0.035 | 0.90-1.20 | 0.15-0.30 |
4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.035 | ≤0.040 | 0.80-1.10 | 0.15-0.25 |
Aplication:
(1) Generally used for producing the important parts with high strength and good plastic.
(2) After nitrogen treatment, used for producing the important parts with special performance
requirements, such as shafts, gears, fasteners, bolt of large dia steamer etc.
Alloy steel bars are highly appreciated for its striking fetures such as resilient, fine finish, optimum tensile strength and corrosion resistant. We fabricate these products using optimum quality materials based on well versatile technology in complying with the quality standards. These products are widely used in various construction, automobiles and mechanical parts.
Product Show:
- Q:What are the different methods of surface polishing for special steel?
- Different methods can be used to polish special steel surfaces, each offering its own advantages and applications. These methods include mechanical polishing, electrochemical polishing, chemical polishing, electropolishing, and vibratory polishing. Mechanical polishing utilizes abrasive materials to eliminate surface imperfections and create a smooth and reflective surface. This can be done manually or with automated polishing machines. It is effective for removing scratches, dents, and other defects. Industries such as automotive, aerospace, and precision engineering commonly employ this method. Electrochemical polishing, also known as electrolytic polishing, involves using an electrolyte solution and electric current to dissolve and eliminate surface material. It is particularly useful for complex shapes and hard-to-reach areas, providing a high level of surface smoothness. This method is frequently used in industries like medical devices, semiconductors, and jewelry manufacturing. Chemical polishing selectively removes surface material and creates a smooth finish using chemical solutions. It is effective for eliminating oxide layers, stains, and contaminants. This method is often used for stainless steel and other corrosion-resistant alloys. The process involves immersing the steel in a chemical bath and controlling factors like temperature, concentration, and time. Electropolishing combines the benefits of electrochemical and chemical polishing. It applies an electric current to remove surface material while dissolving it in an electrolyte solution. Electropolishing produces a highly smooth, clean, and corrosion-resistant surface finish. It is commonly used in industries such as pharmaceuticals, food processing, and semiconductor manufacturing. Vibratory polishing utilizes vibrating media and a polishing compound to remove surface imperfections. Steel parts are placed in a vibratory tumbler or bowl, where continuous movement causes the media to rub against the parts, resulting in a polished surface. This method is commonly used for small or delicate parts and can be a cost-effective and efficient option. When choosing a surface polishing method for special steel, factors such as desired surface finish, part geometry, material properties, and industry requirements should be considered. Consulting with experts or specialists is important to determine the most suitable method for a specific application.
- Q:What are the limitations of using special steel in electrical applications?
- One limitation of using special steel in electrical applications is its relatively high cost compared to other materials such as copper or aluminum. Special steel also tends to be heavier, which can make electrical components or devices bulkier. Additionally, steel has lower electrical conductivity compared to copper, leading to higher resistance and potential energy losses in electrical circuits. Finally, steel is more susceptible to corrosion, which can impact the durability and longevity of electrical equipment if not adequately protected.
- Q:What are the common quality control measures for special steel?
- Common quality control measures for special steel include: 1. Chemical Composition Analysis: Special steel often requires specific chemical compositions to meet the desired properties. Quality control measures involve analyzing the chemical composition through techniques like spectrometry to ensure it meets the required specifications. 2. Mechanical Testing: Special steel needs to possess specific mechanical properties such as strength, hardness, toughness, and ductility. Quality control measures involve conducting mechanical tests like tensile testing, hardness testing, impact testing, and fatigue testing to ensure the steel meets the required standards. 3. Non-Destructive Testing: Non-destructive testing methods like ultrasonic testing, magnetic particle testing, and dye penetrant testing are employed to detect any internal or surface defects in the steel. These tests help ensure the integrity and reliability of the special steel. 4. Dimensional Inspection: Special steel often requires precise dimensions for its intended application. Dimensional inspection involves measuring the length, width, thickness, diameter, and other critical dimensions to ensure they meet the required tolerances specified by the customer or industry standards. 5. Surface Quality Inspection: Special steel may require specific surface finishes or coatings to enhance its performance or resistance to corrosion. Quality control measures involve inspecting the steel surface for defects such as cracks, pits, scratches, or unevenness to ensure it meets the required surface quality standards. 6. Heat Treatment Verification: Special steel often undergoes heat treatment processes like annealing, quenching, or tempering to achieve the desired mechanical properties. Quality control measures involve verifying the effectiveness of the heat treatment process through hardness testing or microstructure analysis. 7. Documentation and Traceability: Quality control measures also involve maintaining comprehensive documentation and traceability records of the special steel, including details of its production process, chemical composition, mechanical properties, and any inspections or tests performed. This helps ensure quality consistency and provides a reference for future use or troubleshooting. By implementing these quality control measures, manufacturers can ensure that special steel meets the required specifications, providing customers with high-quality and reliable products for their specific applications.
- Q:How are magnesium alloys used in lightweight structures?
- Magnesium alloys are used in lightweight structures due to their exceptional strength-to-weight ratio. They offer high tensile strength and stiffness, making them suitable for applications where weight reduction is crucial, such as in the aerospace and automotive industries. These alloys are commonly used in components like aircraft fuselages, engine casings, and lightweight vehicle parts, contributing to improved fuel efficiency and performance. Additionally, magnesium alloys can be easily cast, machined, and welded, allowing for efficient manufacturing processes.
- Q:How does special steel contribute to the manufacturing of precision components?
- Special steel plays a crucial role in the manufacturing of precision components by offering a range of desirable properties that are essential for achieving high levels of accuracy and reliability. Firstly, special steel is known for its exceptional strength and durability. This enables precision components to withstand the high levels of stress and load that they may experience during operation. With special steel, manufacturers can produce precision components that can handle intense forces without warping, deforming, or breaking, ensuring long-lasting performance and reliability. Secondly, special steel exhibits excellent wear resistance. Components made from special steel can withstand friction, abrasion, and wear caused by continuous use or contact with other materials. This is particularly crucial for precision components, as even a slight wear or deformation can significantly impact their functionality and accuracy. By utilizing special steel, manufacturers can ensure that precision components maintain their shape and integrity, resulting in superior performance and longevity. Furthermore, special steel offers exceptional machinability. Its composition and properties make it easier to cut, shape, and form into complex geometries, allowing manufacturers to produce intricate precision components with tight tolerances. This enhanced machinability enables the production of components with precise dimensions, ensuring accuracy and consistency in the final product. Additionally, special steel exhibits excellent corrosion resistance. Precision components are often exposed to harsh environments, chemicals, or moisture, which can lead to corrosion and degradation. However, special steel's corrosion resistance properties help prevent rusting and corrosion, ensuring that precision components remain functional and reliable throughout their lifespan. Lastly, special steel provides thermal stability and high temperature resistance. Precision components may be exposed to extreme heat or rapid temperature changes during operation. Special steel's ability to withstand these conditions without losing its strength or dimensional stability is crucial in ensuring the performance and accuracy of precision components in demanding applications. In summary, special steel contributes significantly to the manufacturing of precision components by providing exceptional strength, wear resistance, machinability, corrosion resistance, and thermal stability. These properties enable manufacturers to produce precise, high-quality components that meet the stringent requirements of various industries, including aerospace, automotive, electronics, and medical devices.
- Q:How does special steel enhance the durability of products?
- Special steel enhances the durability of products by providing exceptional strength, resistance to corrosion, and wear and tear. Its unique composition and manufacturing processes result in a material that can withstand high pressures, extreme temperatures, and harsh environments, prolonging the lifespan of various products and reducing the need for frequent repairs or replacements.
- Q:What are the different classifications of special steel?
- Special steel is a broad term that encompasses various types of steel alloys that possess unique properties and characteristics, making them suitable for specific applications. There are several classifications of special steel, including: 1. Stainless Steel: This type of special steel contains a high percentage of chromium, which provides excellent corrosion resistance. It also typically contains other elements like nickel and molybdenum, enhancing its strength and durability. Stainless steel is commonly used in applications that require resistance to oxidation, heat, chemicals, and wear, such as in food processing, medical devices, and construction. 2. Tool Steel: Tool steel is specifically designed for manufacturing tools, dies, and molds. It is known for its exceptional hardness, wear resistance, and toughness. Tool steel is further classified into several subcategories, including high-speed steel (HSS), cold work steel, hot work steel, and plastic mold steel, each tailored for specific tooling applications. 3. Alloy Steel: Alloy steel is a type of special steel that contains additional alloying elements apart from carbon. These elements, such as manganese, silicon, nickel, chromium, and molybdenum, are added to enhance specific properties like strength, toughness, hardenability, and corrosion resistance. Alloy steels are used in various applications, such as automotive components, machinery, construction, and aerospace. 4. Spring Steel: This type of special steel is specifically designed to withstand repeated bending or twisting without permanently deforming. Spring steel has excellent elasticity and fatigue resistance, making it suitable for applications such as springs, suspension systems, and high-performance automotive parts. 5. Bearing Steel: Bearing steel is engineered to provide high hardness, wear resistance, and dimensional stability necessary for manufacturing bearings. It typically contains high levels of carbon, chromium, and other alloying elements, ensuring the required mechanical properties for reliable and long-lasting bearings. 6. Electrical Steel: Electrical steel, also known as silicon steel, is specifically designed for electrical applications. It possesses low electrical resistivity and high magnetic permeability, allowing it to efficiently conduct and transform electrical energy. Electrical steel is commonly used in transformers, electric motors, and generators. These classifications of special steel highlight the versatility and tailored properties of different steel alloys, enabling their application in a wide range of industries and specialized uses.
- Q:How does the alloying elements affect the properties of special steel?
- Alloying elements have a significant impact on the properties of special steel. By adding specific elements in controlled quantities, the strength, hardness, corrosion resistance, and other desirable properties of steel can be enhanced. For example, the addition of chromium can improve stainless steel's corrosion resistance, while molybdenum can enhance its strength and toughness. Similarly, elements like nickel, vanadium, and tungsten can influence various properties of special steel, making it suitable for specific applications in industries such as automotive, aerospace, and construction. Overall, alloying elements play a crucial role in tailoring the properties of special steel to meet the requirements of diverse applications.
- Q:What are the main applications of special steel in the electronics packaging?
- Special steel is widely used in electronics packaging due to its unique properties. The main applications of special steel in electronics packaging include providing high strength and durability to protect delicate electronic components, offering excellent corrosion resistance to safeguard against environmental factors, and ensuring thermal conductivity for efficient heat dissipation. Additionally, special steel is utilized in creating precise and intricate shapes for components, ensuring electromagnetic compatibility, and providing electrical conductivity for improved performance and reliability in electronic devices.
- Q:What are the different methods of improving the strength of special steel?
- There are several methods that can be employed to improve the strength of special steel. One common method is through the process of alloying. By adding certain elements to the steel, such as manganese, chromium, or vanadium, the strength and hardness of the steel can be significantly increased. These alloying elements form strong and stable compounds with the steel, enhancing its overall strength. Another method is through heat treatment. This involves subjecting the steel to controlled heating and cooling processes to alter its microstructure. For instance, quenching and tempering can be used to increase the strength and hardness of the steel by creating a hardened martensitic structure. Precipitation hardening is another heat treatment technique which involves the formation of fine particles within the steel matrix, resulting in improved strength. Cold working is also a widely used method for strengthening special steel. By subjecting the steel to plastic deformation at low temperatures, its grain structure becomes elongated and dislocations are introduced. This leads to an increase in strength and hardness of the steel. Additionally, surface treatments can be applied to improve the strength of special steel. For example, carburizing or nitriding can be used to introduce carbon or nitrogen into the surface layer of the steel, forming a hard and wear-resistant surface. Furthermore, advancements in metallurgical technology have introduced techniques such as powder metallurgy and rapid solidification. These methods involve the production of steel with fine and homogeneous microstructures, resulting in improved strength and performance. Overall, the methods of improving the strength of special steel include alloying, heat treatment, cold working, surface treatments, and advanced metallurgical technologies. These techniques can be tailored to meet specific requirements, enabling the production of high-strength and high-performance steel for various applications.
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Alloy AISI 4140 Material Steel Round Bars
- 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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