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: What are the different peening techniques used for special steel?
- There are several peening techniques used for special steel, including shot peening, ultrasonic peening, laser peening, and cavitation peening. Each technique involves using different methods and tools to introduce controlled compressive stresses into the material's surface, improving its mechanical properties and resistance to fatigue, stress corrosion, and other forms of degradation.
- Q: How does special steel contribute to the flexibility of products?
- Special steel contributes to the flexibility of products by providing enhanced strength, durability, and resistance to corrosion. Its unique properties allow manufacturers to design and produce products that can withstand high stress, extreme temperatures, and harsh environments. This flexibility enables the creation of a wide range of products that can be used in diverse industries, including automotive, aerospace, construction, and manufacturing.
- Q: How does special steel ensure product reliability?
- Special steel ensures product reliability through its unique properties and manufacturing processes. Special steel is designed to have exceptional strength, durability, and resistance to corrosion, wear, and fatigue. These enhanced properties make it suitable for various critical applications where reliability is paramount, such as in automotive, aerospace, energy, and infrastructure industries. Special steel undergoes rigorous quality control measures during its production to ensure consistency and adherence to specific standards. This helps in minimizing variations and defects, ensuring that the final product meets the required specifications and performs reliably under challenging conditions. Additionally, special steel's ability to be tailored and customized enables manufacturers to create products that are precisely engineered to withstand specific operating environments, further enhancing their reliability.
- Q: What are the common challenges in welding titanium alloys?
- Welding titanium alloys presents various difficulties due to the unique properties of titanium. Firstly, the melting point of titanium is exceptionally high, reaching approximately 1668°C (3034°F). This necessitates the use of specialized equipment and techniques to attain optimal welding conditions. Moreover, this high melting point increases the risk of overheating, which can lead to distortion or warping of the welded components. Another challenge lies in titanium's strong reactivity with oxygen, nitrogen, and hydrogen. These gases can easily contaminate the weld pool during the welding process, resulting in the formation of brittle and porous welds. Therefore, it is essential to take rigorous measures such as utilizing inert shielding gases like argon or helium, maintaining a high level of cleanliness, and employing proper welding techniques like gas tungsten arc welding (GTAW) to minimize contamination and achieve sound welds. Titanium also exhibits a significant affinity for carbon, which can cause the formation of brittle intermetallic compounds during welding. To prevent this, it is crucial to employ low-carbon filler metals and ensure appropriate heat input to avoid carbon diffusion into the weld zone. Furthermore, titanium alloys possess low thermal conductivity, causing heat generated during welding to concentrate in a small area. This concentration leads to localized overheating and potential damage. Hence, it is vital to control heat input and utilize suitable welding techniques to distribute heat evenly, thereby avoiding overheating and preserving the integrity of the welded joint. Lastly, titanium alloys display a high coefficient of thermal expansion, resulting in significant thermal expansion and contraction throughout the welding process. This can lead to distortion and residual stresses in the welded components. To mitigate these issues, preheating and post-weld heat treatment may be required to minimize distortion and relieve residual stresses. In conclusion, the challenges in welding titanium alloys encompass a high melting point, reactivity with gases, potential contamination, formation of intermetallic compounds, low thermal conductivity, and significant thermal expansion. By comprehending these challenges and implementing suitable welding techniques, it is possible to overcome these difficulties and achieve high-quality welds in titanium alloys.
- Q: How does special steel perform in high-pressure and high-temperature environments?
- Special steel performs exceptionally well in high-pressure and high-temperature environments due to its unique composition and properties. It exhibits excellent strength, toughness, and resistance to corrosion, making it ideal for withstanding extreme conditions. Additionally, special steel can maintain its mechanical properties, structural integrity, and dimensional stability even under intense heat and pressure, ensuring reliable performance and longevity in such environments.
- Q: What are the different grades and specifications of special steel?
- Special steel refers to a wide range of high-quality steels that are specifically designed to possess exceptional properties and meet specific requirements for various industrial applications. These grades and specifications of special steel are determined based on their composition, mechanical properties, and intended use. One commonly used grading system for special steel is the AISI-SAE system, which categorizes special steel into different grades based on their chemical composition. For example, AISI-SAE 4140 is a popular grade of special steel known for its high strength, toughness, and wear resistance. It contains elements such as chromium, molybdenum, and carbon, which contribute to its exceptional properties. Another widely used grading system is the ASTM system, which classifies special steel based on their mechanical properties and intended use. ASTM A36 is a commonly used grade of special steel that is known for its excellent weldability, toughness, and low carbon content. It is often used in structural applications, such as building construction and bridges. There are also specific grades and specifications of special steel for particular industries or applications. For example, stainless steel is a special steel grade that contains a high percentage of chromium, which provides excellent corrosion resistance. Stainless steel is commonly used in applications where resistance to moisture, chemicals, and high temperatures is required, such as in the food industry or medical equipment manufacturing. Furthermore, tool steel is a special steel grade specifically designed for making cutting and shaping tools. It possesses high hardness, wear resistance, and heat resistance, making it suitable for applications such as machining, forging, or die casting. In addition to these grades, special steel can also be categorized based on their specifications, such as heat treatment requirements, surface finish, or dimensional tolerances. These specifications ensure that the special steel meets the specific requirements of the intended application. Overall, the different grades and specifications of special steel are tailored to meet the diverse needs of various industries and applications, providing superior performance, durability, and reliability.
- Q: How is special steel classified?
- Special steel is classified based on its chemical composition, physical properties, and intended use. It can be categorized into various types such as stainless steel, tool steel, alloy steel, and high-speed steel, each designed to meet specific requirements and applications in industries like automotive, aerospace, construction, and manufacturing.
- Q: How is corrosion-resistant steel used in marine applications?
- Corrosion-resistant steel is widely used in marine applications due to its ability to withstand the harsh and corrosive environment of seawater. It is used in the construction of various marine structures such as ship hulls, offshore platforms, and underwater pipelines. The steel's unique composition, usually containing elements like chromium, nickel, and molybdenum, forms a protective oxide layer on its surface, preventing corrosion and maintaining its structural integrity over a long period. This helps to improve the durability, longevity, and overall performance of marine equipment and structures, reducing maintenance costs and ensuring safety in maritime operations.
- Q: What are the different methods of surface cleaning for special steel?
- There are several different methods of surface cleaning for special steel, each with its own advantages and applications. Some of the most common methods include: 1. Mechanical Cleaning: This method involves the use of mechanical tools like wire brushes, sandpaper, or abrasive pads to physically remove dirt, rust, or other contaminants from the surface of the steel. Mechanical cleaning is effective for light to moderate surface contamination and is often used as a pre-treatment before other cleaning methods. 2. Chemical Cleaning: Chemical cleaning involves the use of specific chemicals or cleaning agents to dissolve or loosen contaminants on the surface of the special steel. These chemicals can be applied through brushing, spraying, or immersion methods. Acid-based cleaners are commonly used for removing scale, rust, or oxide deposits, while alkaline cleaners are effective for removing oils, greases, or organic residues. 3. Electrochemical Cleaning: This method utilizes electrochemical reactions to remove surface contaminants from special steel. Electrochemical cleaning involves the use of an electric current and an electrolyte solution to dissolve or dislodge dirt, rust, or other deposits. This method is particularly useful for cleaning intricate or hard-to-reach areas on the steel surface. 4. Ultrasonic Cleaning: Ultrasonic cleaning involves the use of high-frequency sound waves in a liquid medium to agitate and remove contaminants from the surface of special steel. This method is highly effective for removing fine particles, oils, greases, or other organic residues from complex or delicate surfaces. 5. High-pressure Water Jetting: High-pressure water jetting uses a focused stream of pressurized water to remove contaminants from the special steel surface. This method is particularly useful for removing heavy deposits, coatings, or paints from large areas. It can be adjusted to different pressure levels to accommodate various degrees of surface contamination. It is important to note that the choice of surface cleaning method for special steel will depend on 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. It is recommended to consult with experts or professionals in the field to determine the most suitable method for a given situation.
- Q: Can special steel be used in the production of musical instruments?
- Yes, special steel can be used in the production of musical instruments. Special steel, also known as tool steel or high-performance steel, is a type of steel that has been specifically designed to possess certain properties that make it suitable for specific applications. These properties include high strength, durability, and resistance to wear and corrosion. In the case of musical instruments, special steel can be used in various components, such as strings, springs, keys, valves, and reeds. For example, piano strings are typically made from high-carbon steel, which provides the necessary strength and elasticity for producing the desired sound. Brass instruments like trumpets or saxophones have valves made from special steel alloys that have excellent corrosion resistance and can withstand the repetitive movements required for playing the instrument. In addition, special steel can also be used in the manufacturing of instrument parts like guitar frets. Frets are metal strips embedded along the fingerboard of a guitar, and they need to be made from a material that is durable, wear-resistant, and able to hold its shape over time. Special steel alloys, such as stainless steel or nickel-silver, are commonly used for this purpose. Overall, special steel offers a range of properties that can enhance the performance and longevity of musical instruments. By using this type of steel, manufacturers can create instruments that produce high-quality sound, are more resistant to wear and tear, and have a longer lifespan.
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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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