AISI 4140 Steel, SAE 4140 Steel Round 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
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
AISI 4140 Steel, SAE 4140 Steel Round Bar
Product Information:
| Size | ||||||||
| Round bar | Diameter(mm) | Length (mm) | ||||||
| 20~800 | 3000~9000 | |||||||
| Plate | Thickness(mm) | Width (mm) | Length (mm) | |||||
| Max:800 | Max:2200 | Max:9000 | ||||||
| The specification can be customized. | ||||||||
| Chemical Compositons | ||||||||
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 42CrMo | 0.38~0.45 | 0.17~0.37 | 0.50~0.8 | ≤0.035 | ≤0.035 | 0.9~1.2 | 0.15-0.25 | ≤0.3 |
| 4140 | 0.40~0.45 | 0.15~0.35 | 0.75~1.0 | ≤0.035 | ≤0.040 | 0.8~1.1 | 0.15-0.25 | - |
| SCM44 | 0.38~0.43 | 0.15~0.35 | 0.60~0.9 | ≤0.030 | ≤0.030 | 0.9~1.2 | 0.15-0.30 | ≤0.25 |
| 1.7225 | 0.38~0.45 | ≤0.40 | 0.60~0.9 | ≤0.025 | ≤0.035 | 0.9~1.2 | 0.15-0.30 | |
Features of 4140 alloy steel
1, Chromium molybdenum alloy steel
2, Slightly higher carbon content then 4130
3, Greater strength and heat treatment
Typical Applications
1, Applications in the oil and gas sector
2, Connection rods, collets, conveyor pins,
3, Gears, stem assemblies,
4, Pump shafts and tool holders
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) |
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- Q: How does the heat treatment process affect the hardness of special steel?
- The hardness of special steel is greatly influenced by the heat treatment process. This process involves heating the steel to a specific temperature, maintaining it at that temperature for a certain period, and then cooling it at a controlled rate. By altering the microstructure of the steel, the heat treatment process impacts its hardness. Quenching, which is one of the most commonly used heat treatment techniques, involves rapidly cooling the steel. This results in the formation of martensite, a hard and brittle microstructure. The rapid cooling prevents the formation of softer microstructures like pearlite or ferrite, leading to an increase in the steel's hardness. Tempering is another heat treatment process that affects the hardness of special steel. After quenching, the steel is often tempered to decrease its brittleness and enhance its toughness. This involves reheating the quenched steel to a lower temperature and then slowly cooling it. Through this process, some of the martensite transforms into a more ductile microstructure, such as tempered martensite or bainite. These microstructures retain some of the hardness of martensite while also providing improved toughness and resistance to fracture. To summarize, the heat treatment process plays a significant role in determining the hardness of special steel. Quenching increases hardness by forming martensite, whereas tempering balances hardness with improved toughness. By adjusting parameters such as temperature and cooling rate, the desired hardness and mechanical properties can be achieved for different applications of special steel.
- Q: How does special steel perform in extreme environments?
- Special steel is specifically designed to perform exceptionally well in extreme environments. It has excellent resistance to corrosion, high temperatures, and mechanical stress, making it highly reliable and durable. Special steel also maintains its strength and integrity even in challenging conditions, ensuring optimal performance and longevity in extreme environments.
- Q: What are the requirements for special steel used in high-performance racing cars?
- The requirements for special steel used in high-performance racing cars are quite stringent in order to meet the demands of the racing environment. Some of the key requirements include: 1. Strength and Durability: Special steel used in racing cars must possess exceptional strength and durability to withstand the extreme loads and stresses experienced during high-speed racing. It should have a high tensile strength and be able to resist fatigue and deformation under intense conditions. 2. Lightness: Racing cars require materials that are lightweight to ensure optimal performance and maneuverability on the track. Special steel used in high-performance racing cars must have a high strength-to-weight ratio, allowing for reduced weight without sacrificing strength or safety. 3. Heat Resistance: The steel must have excellent heat resistance to withstand the high temperatures generated by high-performance engines, braking systems, and exhaust systems. It should be able to maintain its structural integrity and mechanical properties even under extreme heat conditions. 4. Corrosion Resistance: Racing cars are often exposed to harsh environments, including moisture, salt, and other corrosive elements. Therefore, special steel used in racing cars should have high corrosion resistance to prevent rust and degradation, ensuring the longevity and reliability of the components. 5. Machinability: The steel should be easily machinable, allowing for precise manufacturing and fabrication of complex components. This ensures that the parts can be accurately and efficiently produced, resulting in superior performance and reliability. 6. Weldability: Special steel used in racing cars should have good weldability, as welding is often necessary for the assembly of various components. It should be able to withstand the heat generated during welding without experiencing significant loss in strength or other mechanical properties. Overall, the requirements for special steel used in high-performance racing cars revolve around strength, lightness, heat resistance, corrosion resistance, machinability, and weldability. Meeting these requirements is crucial to ensure the safety, performance, and success of racing cars on the track.
- Q: What's the difference between special steel and ordinary steel?
- Compared with ordinary steel, special steel has higher strength and toughness, physical properties, chemical properties, biocompatibility and process performance.
- Q: Is special steel resistant to chemical corrosion?
- Special steel, which is also known as stainless steel, is typically resistant to chemical corrosion. It is an alloy that contains at least 10.5% chromium. The presence of chromium in the steel forms a protective layer on the surface, preventing corrosion. This layer is stable and shields the steel from reacting with chemicals and corrosive substances. Furthermore, special steel may contain other elements like nickel, molybdenum, and titanium. These elements enhance its resistance to chemical corrosion, enabling the steel to withstand exposure to acids, alkalis, salts, and other corrosive agents commonly found in industrial and environmental settings. Nevertheless, it is important to consider that the resistance of special steel to chemical corrosion can vary based on its grade and composition. Different grades of stainless steel offer different levels of corrosion resistance. Therefore, it is crucial to select the appropriate grade depending on the intended application and the specific corrosive environment. To summarize, although special steel generally resists chemical corrosion, the level of resistance can differ depending on the grade and composition. Hence, it is essential to assess specific requirements and seek advice from experts to choose the most suitable special steel for a particular application.
- Q: How is electrical steel used in the production of transformers and motors?
- Electrical steel is primarily used in the production of transformers and motors due to its unique magnetic properties. It is a type of steel that has been specifically designed to have high magnetic permeability, low core losses, and reduced eddy current losses. These properties make electrical steel an ideal material for constructing the cores of transformers and motors. The laminated structure of electrical steel helps to minimize energy losses by reducing the impact of eddy currents. Overall, electrical steel plays a crucial role in enhancing the efficiency and performance of transformers and motors by optimizing the magnetic circuit and reducing energy losses.
- Q: How does special steel contribute to improving product durability?
- Special steel contributes to improving product durability by providing enhanced strength, corrosion resistance, and wear resistance properties. Its unique composition and manufacturing processes make it highly resilient to mechanical stress, extreme temperatures, and harsh environmental conditions, thus ensuring the longevity and reliability of the products it is used in. Furthermore, special steel's exceptional properties allow for the production of lighter and more compact components, leading to increased efficiency, reduced maintenance needs, and improved overall product performance.
- Q: What are the specific requirements for special steel used in the chemical reactor industry?
- The special steel used in the chemical reactor industry can have varying specific requirements depending on the application and the chemicals being processed. However, there are generally expected requirements for this type of steel. First and foremost, the steel must possess outstanding resistance to corrosion. Chemical reactors often handle highly corrosive substances, such as acids, alkalis, and reactive chemicals. Hence, the steel must be able to withstand the corrosive effects of these substances to maintain the integrity and durability of the reactor. Secondly, the steel should exhibit resistance to high temperatures. Chemical reactions often require elevated temperatures to facilitate desired transformations. Therefore, the steel used in these reactors must be capable of enduring these high temperatures without compromising its structural integrity or experiencing significant deformation. Furthermore, the steel should possess favorable mechanical properties, including high strength and toughness. The reactor may undergo high pressure and mechanical stress during operation, so the steel needs to be able to withstand these conditions without failure. Additionally, the steel used in chemical reactors should be easily weldable and formable. This allows for convenient fabrication and construction of the reactor, ensuring a reliable and efficient manufacturing process. Moreover, the steel should have low levels of impurities, such as sulfur and phosphorus. These impurities can have adverse effects on the steel's corrosion resistance and mechanical properties. Therefore, the steel must adhere to stringent quality standards to ensure its suitability for use in the chemical reactor industry. In conclusion, the specific requirements for special steel used in the chemical reactor industry encompass excellent corrosion resistance, high temperature resistance, favorable mechanical properties, weldability, formability, and low impurity levels. Meeting these requirements is crucial to guarantee the safety, reliability, and efficiency of chemical reactors in various industrial processes.
- Q: What are the applications of special steel in the aerospace industry?
- Special steel is widely used in the aerospace industry for various applications. It is utilized in the manufacturing of aircraft components such as engine parts, landing gear, fasteners, and structural components. Special steel exhibits excellent strength, corrosion resistance, and heat resistance, making it ideal for withstanding the extreme conditions experienced during flight. Additionally, it offers high fatigue resistance, crucial for ensuring the long-term durability and safety of aircraft. These properties make special steel indispensable in the aerospace industry, contributing to the overall performance, reliability, and safety of aircraft.
- Q: What are the different non-destructive testing techniques used for special steel?
- There are several non-destructive testing (NDT) techniques that are commonly used for special steel to ensure its quality and integrity without causing any damage. These techniques are essential in industries where special steel is used, such as aerospace, automotive, and construction, to ensure that the material meets the required specifications and standards. Some of the commonly used NDT techniques for special steel are: 1. Ultrasonic Testing (UT): This technique involves the use of high-frequency sound waves to detect internal flaws, such as cracks, voids, or inclusions, in special steel. UT is highly effective in detecting subsurface defects and is widely used due to its versatility and accuracy. 2. Magnetic Particle Testing (MT): MT is a technique that uses magnetic fields and iron particles to detect surface or near-surface defects in special steel. It is particularly useful in identifying defects like cracks, seams, or laps, as the magnetic particles will accumulate at these locations, making them visible under proper lighting conditions. 3. Liquid Penetrant Testing (PT): PT is a widely-used method for detecting surface defects in special steel. It involves applying a liquid penetrant to the surface of the material, which seeps into any surface cracks or defects. After a specified time, the excess penetrant is removed, and a developer is applied to make the defects visible. 4. Eddy Current Testing (ET): ET utilizes electromagnetic induction to detect surface or near-surface defects in special steel. It is particularly useful in detecting cracks, corrosion, or metal loss in conductive materials. ET is a fast and accurate method, making it suitable for high-speed production environments. 5. Radiographic Testing (RT): RT involves the use of X-rays or gamma rays to examine the internal structure of special steel. It can detect various defects, including porosity, inclusions, and cracks. RT provides detailed images that help identify the location, size, and severity of defects. 6. Visual Testing (VT): VT is a simple yet crucial technique that involves a visual examination of the surface of special steel. It helps identify surface defects like scratches, dents, or corrosion. Although VT is not as sensitive as other NDT techniques, it is often used as a preliminary inspection method. Each of these non-destructive testing techniques has its own advantages and limitations. The selection of the appropriate technique depends on factors such as the type and size of the special steel, the required inspection depth, and the specific defects that need to be detected. By using a combination of these techniques, manufacturers and inspectors can ensure the quality and reliability of special steel products.
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AISI 4140 Steel, SAE 4140 Steel Round 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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