Special Steel Scm440 Aisi 4140 Steel CNBM
- 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
Special Steel Scm440 Aisi 4140 Steel CNBM
Product Description:
1.Dia: 10mm-300mm
2.Length: 3000mm-12000mm
3.Process: EAF + LF + VD + Forged + Heat Treatment (optional)
4.Delivery condition: Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)
5.Forged ratio: no less than 3:1
6.Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing
7.Test: ultrasonic test according to SEP 1921-84 3C/c
8.Material details will be as per agreed technical specifications
9.Certificate of Quality: issued in English, in addition the normal terms
Chemical Composition:
GB | AISI | JIS | DIN | C | Si | Mn | Cr | Mo |
27SiMn | - | - | - | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.3 | 0.10-0.15 |
40Cr | 5140 | SCM440 | 41Cr4 | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.10 | 0.10-0.15 |
35CrMo | 4135 | SCM435 | 34CrMo4 | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.15-0.25 |
42CrMo | 4140 4142 | SCM440 | 42CrMo4 | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 |
Application:
scm440 hot rolled round bars and forged round bars used in the manufacture of requirements higher than
35 crmo steel strength and conditioning section larger forgings, such as locomotive traction with the big gear,
supercharger drive gear, pressure vessel gear.
Product Show:
- Q: What are the requirements for special steel used in pharmaceutical manufacturing?
- The requirements for special steel used in pharmaceutical manufacturing include high corrosion resistance, excellent cleanliness and hygiene, resistance to high temperatures and chemicals, and compliance with strict regulatory standards such as Good Manufacturing Practices (GMP). Additionally, the steel must be able to maintain the integrity of the pharmaceutical products, ensuring their purity and preventing contamination.
- Q: Can special steel be used in the production of springs for watches?
- Yes, special steel can be used in the production of springs for watches. Special steel, such as stainless steel or high-carbon steel, is often preferred for making watch springs due to its durability, corrosion resistance, and ability to retain its shape and elasticity over time.
- Q: How does spring steel maintain its elasticity?
- Spring steel maintains its elasticity due to its unique composition and manufacturing process. It is made from a specific type of high-carbon steel that undergoes a specialized heat treatment called quenching and tempering. This process involves heating the steel to a high temperature and then rapidly cooling it in water or oil, followed by reheating to a specific temperature and allowing it to cool slowly. This heat treatment creates a fine-grained microstructure in the steel, which gives it the ability to withstand repeated bending or twisting without permanently deforming. Additionally, the high carbon content in spring steel enhances its strength and resilience, allowing it to return to its original shape even after being subjected to significant force or pressure.
- Q: What are the different heat treatment processes used in special steel?
- Some of the different heat treatment processes used in special steel include annealing, tempering, hardening, and quenching. Each of these processes is designed to alter the properties of the steel, such as its hardness, strength, and ductility, to meet specific requirements for different applications. Annealing involves heating the steel to a specific temperature and then slowly cooling it, which helps to relieve internal stresses and improve its machinability. Tempering involves reheating the steel after hardening to a lower temperature, which reduces its brittleness and increases its toughness. Hardening involves heating the steel to a high temperature and then rapidly cooling it, typically in water or oil, to achieve maximum hardness. Quenching is the rapid cooling process used to achieve hardening. These heat treatment processes can significantly enhance the performance and durability of special steel in various industries.
- Q: What are the main characteristics of tool steel forgings?
- Tool steel forgings possess a variety of qualities that render them highly valuable for diverse applications. Primarily, tool steel forgings are renowned for their remarkable durability and strength. They are specifically engineered to endure significant levels of stress, making them ideal for situations where toughness and resistance to wear and tear are indispensable. This strength empowers tool steel forgings to retain their shape and integrity even under extreme circumstances, such as elevated temperatures or heavy loads. Another noteworthy characteristic of tool steel forgings is their exceptional hardness. Through the process of quenching and tempering, tool steel achieves substantial levels of hardness. This technique involves heating the steel to a precise temperature and rapidly cooling it. This hardness endows tool steel forgings with remarkable resistance to abrasion, making them well-suited for activities involving cutting, shaping, and molding materials. Furthermore, tool steel forgings exhibit superb dimensional stability. Consequently, they experience minimal distortion or shrinkage when exposed to heat or pressure. This quality renders them ideal for applications that demand precision tooling. Moreover, their dimensional stability ensures that the forgings maintain their accuracy and reliability over time, a crucial aspect in industries such as manufacturing and engineering. Additionally, tool steel forgings offer excellent machinability, meaning they can be conveniently shaped, drilled, and cut to fulfill specific requirements. This versatility and adaptability enable their utilization in a wide range of applications, from forming intricate shapes to crafting elaborate designs. Lastly, tool steel forgings possess outstanding wear resistance. This characteristic enables them to retain their cutting edges and surfaces for prolonged periods, thereby reducing the need for frequent sharpening or replacement. This wear resistance proves especially advantageous in industries such as automotive, aerospace, and tool manufacturing, where longevity and efficiency are paramount. In conclusion, the primary qualities of tool steel forgings encompass exceptional durability and strength, high hardness, excellent dimensional stability, good machinability, and excellent wear resistance. These characteristics bestow tool steel forgings with immense desirability across various industries, where reliability, precision, and longevity are crucial.
- Q: What are the different quenching techniques used for special steel?
- There are several quenching techniques used for special steel, including oil quenching, water quenching, polymer quenching, and air quenching. Each technique has its own advantages and disadvantages and is chosen based on the specific requirements of the steel being quenched. Oil quenching provides a slower cooling rate, resulting in reduced risk of cracking and distortion. Water quenching, on the other hand, provides a rapid cooling rate, making it suitable for achieving maximum hardness. Polymer quenching offers a controlled cooling rate, allowing for the desired balance between hardness and toughness. Air quenching is the slowest cooling method, providing the least hardness but also the least risk of distortion. The choice of quenching technique depends on the desired properties of the special steel and the specific application it will be used for.
- Q: What are the challenges in heat treating special steel?
- Some of the challenges in heat treating special steel include achieving uniform heating and cooling rates, controlling distortion and warping, managing the formation of unwanted phases or microstructures, maintaining precise temperature control, and ensuring consistent and repeatable results. Additionally, special steels may have specific alloying elements or compositions that require specialized heat treatment processes or equipment, further adding to the complexity and challenges in heat treating these materials.
- Q: How is electrical steel used in the manufacturing of transformers?
- Electrical steel, also known as silicon steel, is crucial in the manufacturing of transformers due to its unique magnetic properties. It is used to construct the core of the transformer, which is responsible for transferring electrical energy from one circuit to another. The high magnetic permeability and low core losses of electrical steel help enhance the efficiency and performance of the transformer by reducing energy losses during the conversion process.
- Q: What are the applications of special steel in the oil and gas supply chain?
- Special steel is widely used in the oil and gas supply chain due to its exceptional properties. It is used for various applications such as pipes, valves, and fittings, where its high strength, corrosion resistance, and ability to withstand extreme temperatures and pressures are crucial. Special steel is also used in equipment like drilling tools, offshore platforms, and storage tanks, ensuring reliability and durability in challenging environments. Additionally, it is employed in the construction of pipelines, providing a reliable and safe mode of transportation for oil and gas products.
- Q: How does special steel contribute to the manufacturing of shafts and axles?
- Special steel is used in the manufacturing of shafts and axles due to its superior strength, durability, and resistance to wear and tear. It allows for the production of shafts and axles that can withstand high levels of stress, torque, and impact, making them suitable for heavy-duty applications such as automotive and industrial machinery. Additionally, special steel's exceptional machinability allows for precise shaping and customization of shafts and axles, ensuring optimal performance and reliability in various industries.
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Special Steel Scm440 Aisi 4140 Steel CNBM
- 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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