ASTM 4140 Alloy Steel Round Bar
- 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
ASTM 4140 Alloy Steel Round Bar
Product Details:
1) Melting process: BOF + LF + VD
2) Heat treatment: Normalized / Annealed / Quenched / Tempered
3) Surface condition: Black surface / Peeled / Turned / Milled
4) Straightness: Max.3mm/1000mm
5) Appearance: Free of cracks, visible inclusions, pit on the appearance;
6) Guarantee: Ultrasonic test according to SEP 1921-84 G3 C/c
7) Certificate of quality: As per EN 10204/3.1B
8) Marking: Grade, Heat No.,Diameter will be stamped one each bar with required color
9) Packing: In bulk reinforced
10) MOQ: 10 tons / Grade / Size
11) Delivery time: 30 days
12) Payment: T/T 30% deposit, 70% balance upon photocopy of B/L copy, or 100% LC at sight.
Designation by Standards
rand Name | Ravne No. | Mat. No. | DIN | EN | AISI |
42CD4 | 514 | 1.7225 | 42CrMo4 | - | 4140 |
Chemical Composition (in weight %)
C | Si | Mn | Cr | Mo | Ni | V | W | Others |
0.39-0.45 | 0.1-0.4 | 0.6-0.9 | 0.9-1.2 | 0.15-0.25 | - | - | - | - |
Application:
Our products have been used in aviation,aerospace,navigation,nuclear energy,chemical industry,
electronic information,machine manufacture, petrochemical, automotive,instrument and meter, Communication ,transportation, and medical instruments etc.
Product Show:
- Q: What are the applications of special steel in the aerospace sector?
- Special steel has numerous applications in the aerospace sector due to its exceptional properties and capabilities. Firstly, special steel is used in the manufacturing of aircraft engines. The high strength and temperature resistance of special steel make it ideal for components such as turbine blades and discs, which are subjected to extreme heat and stress during operation. Special steel also offers excellent corrosion resistance, ensuring the longevity and reliability of critical engine parts. Another application of special steel in the aerospace sector is in the construction of aircraft structures. Special steel alloys are utilized to fabricate landing gear, wing components, and other structural elements. The high strength-to-weight ratio of special steel enables the production of lightweight yet robust structures, contributing to fuel efficiency and overall performance. Special steel is also employed in the production of aerospace fasteners. These include bolts, nuts, and screws that hold various aircraft components together. The exceptional mechanical properties and resistance to fatigue and vibration of special steel make it an ideal material for fasteners, ensuring the integrity and safety of aircraft assemblies. Furthermore, special steel finds application in aerospace tooling and equipment. Tools used in the manufacturing process, such as cutting tools and molds, are often made from special steel. Its high hardness and wear resistance enable efficient and precise machining of aerospace components. Additionally, special steel is utilized in the production of specialized equipment, such as test rigs, calibration devices, and ground support equipment, which are crucial for aerospace operations and maintenance. In summary, special steel plays a vital role in the aerospace sector. Its use in aircraft engines, structures, fasteners, and tooling contributes to the overall safety, performance, and reliability of aerospace systems. The unique properties of special steel make it an indispensable material for the demanding and critical applications within the aerospace industry.
- Q: How does special steel contribute to reducing product costs while maintaining quality?
- Special steel contributes to reducing product costs while maintaining quality through various ways. Firstly, special steel offers higher strength and durability, allowing manufacturers to create lighter and more efficient designs. This reduces material usage and transportation costs while maintaining the desired product performance. Additionally, special steel's exceptional corrosion resistance minimizes the need for expensive protective coatings or frequent maintenance, saving on long-term costs. Its superior heat resistance also enables manufacturers to use less energy during production processes, resulting in reduced operational expenses. Furthermore, special steel's unique properties, such as high machinability and formability, enhance manufacturing efficiency. This leads to reduced production time, lower labor costs, and increased overall productivity. Overall, the use of special steel in product manufacturing optimizes cost-efficiency without compromising quality, making it an indispensable material for many industries.
- Q: How does special steel resist deformation under load?
- The unique composition and manufacturing techniques of special steel are specifically designed to prevent deformation under load. Its high strength is one of the key factors contributing to this resistance. Special steel is typically alloyed with elements like chromium, nickel, and molybdenum, which enhance its mechanical properties and make it stronger than regular steel. This increased strength allows the steel to bear heavier loads without significant deformation occurring. In addition, special steel often undergoes specialized heat treatment processes like quenching and tempering. These processes alter the steel's microstructure, resulting in a fine-grained structure and increased hardness. The fine-grained structure helps distribute the applied load more evenly, reducing the risk of localized deformation. Furthermore, special steel can exhibit exceptional toughness, meaning it can absorb a significant amount of energy before fracturing. Achieving this toughness involves carefully controlling the steel's chemical composition and manufacturing processes, such as controlling cooling rates during heat treatment. The ability to absorb energy without undergoing deformation further enhances its resistance to load-induced deformation. Moreover, special steel can possess superior fatigue resistance, allowing it to withstand repeated loading and unloading cycles without deformation. This is achieved by eliminating impurities and controlling the steel's grain structure, reducing the initiation and propagation of cracks that can lead to deformation. In conclusion, the combination of high strength, fine-grained structure, toughness, and fatigue resistance in special steel enables it to resist deformation under heavy loads. These characteristics are meticulously engineered and optimized during the manufacturing process to ensure that the steel can withstand intended applications and loads without significant deformation occurring.
- Q: How does special steel contribute to improving product performance under extreme conditions?
- Special steel contributes to improving product performance under extreme conditions by offering enhanced strength, corrosion resistance, and high temperature stability. Its unique composition and manufacturing processes allow it to withstand extreme temperatures, pressures, and harsh environments, ensuring the reliability and durability of products in challenging circumstances. Additionally, special steel's superior mechanical properties and ability to maintain structural integrity enable it to resist wear, fatigue, and deformation, thus improving the overall performance and longevity of products when exposed to extreme conditions.
- Q: What is the impact strength of special steel?
- The impact strength of special steel is typically higher than that of regular steel, which means it can withstand greater force or shock without breaking or deforming.
- Q: What are the different methods of improving the corrosion resistance of special steel?
- Improving the corrosion resistance of special steel can be accomplished through several available methods. Some commonly utilized techniques include: 1. Alloying: Enhancing corrosion resistance can be effectively achieved by alloying the steel with specific elements. For instance, the addition of chromium forms a protective chromium oxide layer on the surface, acting as a barrier against corrosion. Other elements such as molybdenum, nickel, and copper can also be incorporated to enhance corrosion resistance. 2. Surface treatments: Various surface treatments can be employed to augment the steel's corrosion resistance. Galvanizing, for example, involves coating the steel with a layer of zinc, providing protection against corrosion. Another method, electroplating, deposits a thin layer of a more corrosion-resistant metal like nickel or chromium onto the steel surface. 3. Passivation: Passivation is a chemical process that eliminates free iron and other contaminants from the steel surface, resulting in the creation of a passive film that aids in corrosion resistance. This method is frequently used for stainless steel, in which a thin layer of chromium oxide is formed by treating the steel with an oxidizing agent such as nitric acid. 4. Protective coatings: The application of protective coatings on the steel surface significantly enhances its corrosion resistance. Various types of coatings, such as paints, epoxy coatings, and ceramic coatings, act as a barrier between the steel and the corrosive environment, preventing direct contact and corrosion. 5. Heat treatment: Heat treatment techniques, including annealing, quenching, and tempering, can alter the steel's microstructure, thereby enhancing its corrosion resistance. Heat treatment improves the steel's mechanical properties, reduces residual stresses, and eliminates impurities, all of which contribute to better corrosion resistance. 6. Design considerations: Proper design and construction techniques play a crucial role in improving the corrosion resistance of special steel. For instance, the elimination of sharp corners and crevices, the use of appropriate drainage systems, and ensuring proper ventilation can prevent the accumulation of moisture and corrosive agents. It is important to note that the selection of the most suitable method depends on the specific application, environment, and desired level of corrosion resistance. Optimal results can often be achieved by employing a combination of these methods.
- Q: Is special steel suitable for electrical and electronic applications?
- Yes, electrical and electronic applications can benefit from the use of special steel. Special steel refers to steel alloys that are specifically designed to have certain properties or characteristics that make them suitable for specific applications. When it comes to electrical and electronic applications, special steel offers several advantages. One of the main requirements for electrical and electronic applications is high electrical conductivity. Although steel is not known for its electrical conductivity, certain special steel alloys can be engineered to have improved electrical conductivity. For example, by adding elements like nickel or copper to stainless steel, its electrical conductivity can be enhanced, making it suitable for applications where efficient flow of electrical current is needed. Magnetic properties are also important for electrical and electronic applications. Some special steel alloys exhibit exceptional magnetic properties, making them ideal for use in transformers, motors, and generators. These alloys possess qualities such as high magnetic permeability, low coercivity, and low hysteresis losses, which are crucial for efficient energy transfer and minimal power loss. Additionally, special steel provides excellent corrosion resistance, which is essential for electrical and electronic equipment that may come into contact with moisture or harsh environments. Stainless steel, for instance, is highly resistant to corrosion, ensuring the longevity and reliability of the equipment. In conclusion, special steel can be suitable for electrical and electronic applications when it possesses the necessary electrical conductivity, magnetic properties, and corrosion resistance. Manufacturers can ensure the performance, durability, and reliability of electrical and electronic equipment by selecting the appropriate special steel alloy.
- Q: How is free-cutting steel used in the manufacturing of screws and bolts?
- Free-cutting steel is commonly used in the manufacturing of screws and bolts due to its excellent machinability. The steel's composition includes additives such as sulfur, lead, or bismuth, which act as lubricants during the machining process, making it easier to cut and shape the material. This results in a faster and more efficient production of screws and bolts, reducing manufacturing time and costs.
- Q: How does special steel play a role in the defense sector?
- The defense sector heavily relies on special steel because of its unique properties and characteristics, which make it highly suitable for various applications. Firstly, special steel possesses exceptional strength and durability, making it perfect for the manufacturing of military vehicles, armored personnel carriers, and tanks. These vehicles necessitate materials that can withstand high impacts, resist deformation, and provide protection against enemy attacks. Additionally, special steel finds its use in the production of military aircraft and naval vessels. Its high strength-to-weight ratio enables the construction of lightweight yet sturdy structures, allowing aircraft to carry heavy payloads and naval vessels to navigate through harsh conditions. Furthermore, special steel's resistance to corrosion makes it ideal for marine environments, ensuring the long lifespan and reliability of naval assets. Furthermore, special steel is utilized for the manufacturing of weapons and ammunition. Its hardness and toughness make it suitable for producing firearm barrels, armor-piercing projectiles, and other critical components. The ability of special steel to withstand extreme pressures, temperatures, and impact forces guarantees the accuracy, reliability, and effectiveness of military weaponry. Moreover, special steel is employed in the defense sector for the production of communication and surveillance equipment. Its electromagnetic properties allow for the creation of radar systems, antennas, and electronic enclosures, which are crucial for military operations. Special steel's resistance to electromagnetic interference ensures the integrity and security of communication systems, thereby enhancing the overall efficiency and effectiveness of defense operations. In conclusion, special steel plays a vital role in the defense sector by providing the necessary strength, durability, corrosion resistance, and electromagnetic properties for various applications. Its utilization in military vehicles, aircraft, naval vessels, weapons, and communication equipment enhances the overall capabilities, effectiveness, and safety of defense forces, thereby ensuring national security.
- Q: How does special steel contribute to the aerospace turbine industry?
- Special steel plays a crucial role in the aerospace turbine industry by offering various advantages that cannot be found in other materials. Firstly, special steel is known for its exceptional strength and durability, making it ideal for withstanding the extreme conditions within aerospace turbines. The high temperatures, pressures, and rotational speeds experienced by turbine components demand a material that can withstand these harsh conditions without compromising performance or safety. Additionally, special steel exhibits excellent heat resistance and corrosion resistance properties, which are essential for the longevity of turbine components. The ability to resist oxidation and corrosion allows special steel to maintain its structural integrity and functionality over extended periods of time, reducing the need for frequent maintenance or replacement. Moreover, special steel offers excellent machinability and formability, enabling the production of complex and intricate turbine components. This allows for the creation of highly efficient and precisely engineered turbine blades, vanes, and other critical parts that are essential for the optimal performance of aerospace turbines. Furthermore, special steel provides the necessary characteristics for improved fuel efficiency in aerospace turbines. By utilizing high-strength special steel alloys, turbine manufacturers can design lighter and more aerodynamic components, reducing overall weight and drag. This, in turn, leads to increased fuel efficiency and lower emissions, contributing to a more sustainable and environmentally friendly aviation industry. In conclusion, special steel plays a pivotal role in the aerospace turbine industry by providing the necessary strength, durability, heat resistance, corrosion resistance, and machinability required for the efficient and reliable operation of turbine components. Its contribution to the industry extends to improved fuel efficiency, reduced maintenance needs, and enhanced overall performance, making it an indispensable material for the aerospace turbine industry.
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ASTM 4140 Alloy Steel Round Bar
- 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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