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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Item specifice
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:How is corrosion-resistant steel used in marine environments?
- Corrosion-resistant steel, also known as stainless steel, is extensively used in marine environments due to its ability to withstand the adverse effects of corrosion caused by saltwater exposure. It is commonly utilized in the construction of various marine components, such as hulls, propellers, and equipment, to ensure durability and longevity. The steel's corrosion resistance properties help protect against rust and degradation, ultimately enhancing the structural integrity and performance of marine vessels and infrastructure in harsh saltwater conditions.
- Q:What are the main characteristics of creep-resistant steel?
- Creep-resistant steel is a type of steel that exhibits high resistance to creep, which is the deformation that occurs under prolonged exposure to high temperatures and stress. The main characteristics of creep-resistant steel include: 1. High temperature resistance: Creep-resistant steel is capable of withstanding extremely high temperatures without significant deformation. This is crucial in applications where the material is exposed to elevated temperatures for an extended period of time, such as in power plants, boilers, and gas turbines. 2. Strength and toughness: Creep-resistant steel has excellent mechanical properties, including high tensile strength and toughness. This allows the material to withstand the stress and pressure that it is subjected to, even at high temperatures. 3. Resistance to corrosion and oxidation: Creep-resistant steel is often alloyed with elements such as chromium, molybdenum, and nickel, which enhance its resistance to corrosion and oxidation. This makes it suitable for use in aggressive environments where exposure to moisture, chemicals, and gases is common. 4. Dimensional stability: Creep-resistant steel exhibits minimal dimensional changes even under prolonged exposure to high temperatures and stress. This means that the material retains its shape and size, ensuring the integrity of the structure or component it is used in. 5. Longevity and durability: The combination of high temperature resistance, strength, and corrosion resistance makes creep-resistant steel highly durable and long-lasting. This reduces the need for frequent maintenance and replacement, improving the overall efficiency and cost-effectiveness of applications that rely on this material. Overall, creep-resistant steel is specifically designed to withstand the challenging conditions of high temperatures and stress, making it a preferred choice in industries where reliability and safety are paramount.
- Q:What are the different surface hardening grades of special steel?
- There are several different surface hardening grades of special steel, each designed to provide specific characteristics and properties. Some of the commonly used grades include: 1. Case-hardening steels: These grades are typically low carbon steels that are designed to develop a hard outer layer, or case, while maintaining a softer core. This is achieved through processes like carburizing or nitriding, which introduce carbon or nitrogen into the surface of the steel. Case-hardening steels are often used in applications where wear resistance and toughness are required. 2. Tool steels: These grades are specifically designed for use in cutting, forming, and shaping tools. Tool steels are known for their high hardness, resistance to wear, and ability to retain their cutting edge even at elevated temperatures. Various types of tool steels are available, such as high-speed steel (HSS), hot work steel, cold work steel, and plastic mold steel, each suitable for specific applications. 3. Stainless steels: These grades of special steel contain a minimum of 10.5% chromium, which provides excellent corrosion resistance. Stainless steels can be hardened through processes like precipitation hardening or martensitic transformation. They are commonly used in industries such as food processing, chemical, and medical, where resistance to corrosion and high temperatures are crucial. 4. High-strength steels: These grades are designed to provide exceptional strength and toughness. They often contain alloying elements like manganese, chromium, or nickel to enhance their mechanical properties. High-strength steels are commonly used in structural applications, automotive components, and heavy machinery. 5. Maraging steels: These grades of special steel are known for their high strength, toughness, and excellent resistance to fracture. Maraging steels achieve their properties through a unique aging process, which involves a precipitation-hardening treatment. They find applications in aerospace, defense, and tooling industries. 6. Bearing steels: These grades are specifically formulated to provide excellent wear resistance and durability for use in bearing applications. Bearing steels often contain alloying elements like chromium, molybdenum, and vanadium to enhance their mechanical properties and resistance to fatigue. These are just a few examples of the different surface hardening grades of special steel. Each grade offers unique properties and characteristics, allowing for a wide range of applications in various industries.
- Q:How is precipitation-hardening steel used in aerospace applications?
- Precipitation-hardening steel is used in aerospace applications due to its excellent strength-to-weight ratio, corrosion resistance, and high temperature endurance. It is commonly used to manufacture various components like aircraft landing gear, engine parts, and structural elements. The steel's ability to be heat treated and aged to enhance its mechanical properties makes it ideal for aerospace applications, where strength, durability, and lightweight materials are crucial for safe and efficient flight operations.
- Q:How does special steel perform in terms of electrical resistivity?
- Special steel typically has higher electrical resistivity compared to other types of steel. This means that it offers greater resistance to the flow of electric current, making it less conductive.
- Q:Can special steel be used for making aerospace components?
- Yes, special steel can be used for making aerospace components. Special steel, also known as aerospace steel or aircraft steel, is specifically designed to meet the high demands and stringent requirements of the aerospace industry. It possesses exceptional strength, durability, and heat resistance properties, which are crucial for withstanding the extreme conditions experienced by aircraft components during flight. Aerospace components, such as landing gear, engine parts, fasteners, and structural elements, often require materials that can maintain their integrity under high temperatures, stress, and corrosive environments. Special steel alloys are developed to have excellent mechanical properties, including high tensile strength, fracture toughness, and resistance to fatigue, creep, and corrosion. These properties make them suitable for critical aerospace applications where safety and reliability are of utmost importance. Furthermore, special steel can be tailored to specific requirements, such as weight reduction, improved fuel efficiency, and enhanced performance. Through advanced alloying techniques and heat treatments, aerospace steel can be engineered to have desirable characteristics like increased hardness, wear resistance, and dimensional stability. This allows for the production of lighter and more efficient aerospace components without compromising on strength or safety. In conclusion, special steel is a preferred material for making aerospace components due to its exceptional mechanical properties, heat resistance, and corrosion resistance. Its ability to withstand extreme conditions and be customized to specific requirements makes it an ideal choice for manufacturing critical parts used in the aerospace industry.
- Q:How does special steel contribute to improving product functionality?
- Special steel contributes to improving product functionality in several ways. Firstly, special steel has superior strength and durability compared to regular steel, allowing products to withstand higher loads and stresses. This means that products made with special steel can perform better in demanding conditions, ensuring their longevity and reliability. Additionally, special steel offers enhanced corrosion resistance, which is crucial for products that are exposed to harsh environments or chemicals. This resistance helps prevent rust and degradation, extending the lifespan of the product and maintaining its functionality. Furthermore, special steel can be tailored to have specific characteristics, such as high heat resistance or excellent electrical conductivity. This customization allows manufacturers to design products with improved performance in specific applications, such as high-temperature engines or electrical components. In summary, special steel's superior strength, durability, corrosion resistance, and customizable properties significantly contribute to improving the functionality of various products, ensuring higher performance, longer lifespan, and increased reliability.
- Q:How does special steel perform in low-temperature applications?
- Special steel performs well in low-temperature applications due to its unique properties such as high strength, toughness, and resistance to brittleness. It retains its mechanical properties even at extremely cold temperatures, making it ideal for industries like aerospace, automotive, and energy where materials need to withstand challenging environments.
- Q:What are the different heat treatment processes for special steel?
- There are several heat treatment processes for special steel, including annealing, quenching, tempering, and normalizing. Annealing involves heating the steel to a specific temperature and then slowly cooling it, which helps to enhance its ductility and reduce internal stresses. Quenching is a rapid cooling process that involves immersing the steel in a liquid, such as water or oil, to increase its hardness and strength. Tempering is a process that follows quenching, where the steel is heated to a lower temperature and then cooled, which helps to relieve internal stresses and improve toughness. Normalizing is a process similar to annealing, but the steel is air-cooled instead of being slowly cooled, resulting in a more refined grain structure and improved mechanical properties.
- Q:Can special steel be welded?
- Yes, special steel can be welded.
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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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