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 precipitation-hardening steel achieve high strength through heat treatment?
- Precipitation-hardening steel achieves high strength through heat treatment by a process called aging. This involves heating the steel to a specific temperature and holding it there for a certain period of time, followed by rapid cooling. During this process, the alloying elements in the steel form fine particle precipitates, which obstruct the movement of dislocations within the crystal structure. These precipitates act as barriers that hinder the deformation of the material, resulting in increased strength.
- Q: Can special steel be used in the appliance manufacturing industry?
- Yes, special steel can be used in the appliance manufacturing industry. Special steel, such as stainless steel or heat-resistant steel, offers superior strength, durability, and corrosion resistance, making it suitable for various appliance components like oven interiors, refrigerator doors, or dishwasher racks. Its properties enhance the overall performance and longevity of appliances, ensuring high-quality products for consumers.
- Q: What are the different methods of joining special steel?
- There are various techniques available for joining special steel, each presenting its own advantages and limitations. Some of the most frequently employed methods comprise: 1. Welding: The most prevalent technique for joining steel involves melting the base material and incorporating a filler material to establish a robust connection. Depending on the specific requirements, different welding techniques like arc welding, gas welding, and laser welding can be utilized. 2. Brazing: This approach necessitates heating the steel and melting a filler metal with a lower melting point, which then infiltrates the joint through capillary action. Brazing is commonly employed when joining dissimilar metals or when a lower-temperature joining process is indispensable. 3. Soldering: Similar to brazing, soldering also employs a filler material with a lower melting point to join the steel. However, soldering involves melting the filler material without melting the base material. It is often employed for electrical connections and delicate applications. 4. Mechanical fastening: This method entails utilizing mechanical means such as bolts, screws, rivets, or other types of fasteners to join the steel components. Mechanical fastening is frequently favored in situations where disassembly or maintenance is necessary. 5. Adhesive bonding: Special steel can also be joined using adhesives that establish a sturdy bond between the surfaces. Adhesive bonding is suitable for joining intricate shapes, minimizing stress concentrations, and providing exceptional corrosion resistance. 6. Friction welding: This technique involves the application of pressure to rub or spin two steel components together, generating heat that creates a bond. Friction welding is commonly employed for joining high-strength or heat-treated steels. 7. Explosive welding: This method employs explosives to facilitate a high-speed collision between two steel surfaces, resulting in a bond formed in a solid state. Explosive welding is frequently used for joining dissimilar metals or when high strength and corrosion resistance are required. The selection of the appropriate joining method depends on factors such as the type of steel, the desired strength and durability of the joint, the specific application requirements, and the availability of equipment and expertise.
- Q: What are the requirements for special steel used in railway applications?
- The requirements for special steel used in railway applications include high tensile strength, excellent wear resistance, and superior toughness to withstand heavy loads and repeated impacts. It should also have good corrosion resistance to withstand outdoor conditions and provide long-term durability. Additionally, the steel should have good machining and welding capabilities for ease of fabrication and maintenance.
- Q: How does special steel contribute to the oil and gas industry?
- Special steel plays a crucial role in the oil and gas industry by providing strength, corrosion resistance, and durability to equipment and infrastructure. It is used in the construction of pipelines, drill pipes, wellheads, valves, and various other components. The unique properties of special steel enable it to withstand harsh operating conditions, high pressures, and corrosive environments, ensuring the reliability and safety of oil and gas operations.
- Q: How does special steel perform in high-temperature creep?
- Special steel is specifically designed to perform well in high-temperature creep conditions. Creep refers to the tendency of a material to deform under constant stress over time at elevated temperatures. Special steel exhibits excellent resistance to creep due to its unique composition and heat treatment processes. The alloying elements used in special steel, such as chromium, nickel, and molybdenum, significantly enhance its high-temperature strength and creep resistance. These alloying elements form stable carbides and improve the material's ability to retain its structural integrity even at elevated temperatures. Furthermore, special steel is often subjected to specific heat treatment methods, such as annealing or quenching and tempering, to further enhance its creep resistance. These processes help in refining the microstructure of the steel, reducing the presence of internal stresses, and improving its overall mechanical properties. The combination of alloying elements and heat treatment processes in special steel provides it with exceptional creep resistance. It can withstand prolonged exposure to high temperatures without significant deformation or failure. This makes special steel an ideal choice for applications that involve high-temperature and high-stress conditions, such as gas turbines, petrochemical plants, and power generation facilities. Overall, the performance of special steel in high-temperature creep is outstanding, and it is widely recognized as a reliable and durable material for applications requiring resistance to thermal deformation and long-term stability under constant stress.
- Q: What are the different methods of measuring the hardness of special steel?
- There are several methods of measuring the hardness of special steel, including the Rockwell hardness test, Vickers hardness test, Brinell hardness test, and the Knoop hardness test. These methods involve applying a specific force or load to a small area of the steel surface and measuring the depth or size of the resulting indentation. Each method has its own advantages and is suitable for different types of steel and specific applications.
- Q: What are the different forging techniques for special steel?
- There are several different forging techniques used for special steel, including open die forging, closed die forging, and ring rolling. Open die forging involves shaping the steel between flat dies or anvils, while closed die forging uses shaped dies to compress the steel into the desired shape. Ring rolling involves shaping the steel by rolling it between two or more dies, creating a seamless ring shape. Each forging technique has its own advantages and is chosen based on the specific requirements of the steel product being produced.
- Q: What are the challenges in recycling special steel?
- One of the main challenges in recycling special steel is the complexity of its composition. Special steel often contains various alloying elements and additives that can make the recycling process more difficult. These elements need to be carefully identified and separated in order to maintain the desired properties of the recycled steel. Additionally, special steel may have undergone specific heat treatments or surface coatings, which further complicate the recycling process. Proper sorting, identification, and treatment techniques are necessary to overcome these challenges and ensure the successful recycling of special steel.
- Q: What are the main applications of special steel in the mining equipment?
- Special steel is widely used in mining equipment due to its high strength, durability, and resistance to wear, corrosion, and impact. It finds applications in various mining equipment components such as drill bits, crushers, conveyor systems, and grinders. These specialized steels can withstand extreme conditions, enhance productivity, and ensure safety in mining operations.
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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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