Special Steel SAE4140 Alloy Steel Round Bar

Special Steel SAE4140 Alloy Steel Round Bar System 1

Special Steel SAE4140 Alloy Steel Round 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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Product information

1. Grade: 4140,SAE4140, 42CrMo4, 1.7225,SCM440

2. Specification: Dia: 16~800mm Length:2000-13000mm or as required

3. Process: EAF+LF+VD

4. Technique:Forged

5.Treatment:hot rolled,cold drawn

6.Mechanical performance:

Strength of extension	1080MPA
Yield point	930MPA
Elongation	12%
Contractibility rate	45%
Impacting energy	63J

7.Chemical composition(for reference only):

Grade	C	Si	Mn	P≤	S≤	Cr	Mo
SAE4140	0.38/0.43	0.15/0.35	0.75/1.00	0.035	0.035	0.80/1.10	0.15/0.25

8. Compared grades of 4140 steel

GB-China	AISI-America	DIN-GERMANY	JIS-Japan
42CrMo	4140	1.7225 42CrMo4	SCM440

GB-China

AISI-America

DIN-GERMANY

JIS-Japan

42CrMo

4140

1.7225

42CrMo4

SCM440

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Special Steel SAE4140 Alloy Steel Round Bar

Shipping

1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

Delivery Time: 3-7 days for samples; 5-25 days for batch goods.

Payment Terms

1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.

2.MOQ: 1pcs

3.Warranty : 3 years

4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)

2)as customer's requirement

Why choose us?

(1) The leading exporter in China special steel industry.

(2) Large stocks for various sizes, fast delivery date.

(3) Good business relationship with China famous factories.

(4) More than 7 years steel exporting experience.

(5) Good after-sales service guarantee.

Q:What are the main applications of special steel in the defense equipment?: Special steel is widely used in defense equipment due to its exceptional properties such as high strength, durability, and corrosion resistance. It finds applications in various defense equipment including tanks, submarines, aircraft carriers, missile systems, armored vehicles, and military aircraft. Special steel is crucial for manufacturing components like armor plates, missile casings, propeller shafts, gun barrels, and other critical parts that require enhanced performance and reliability. Its usage ensures the defense equipment can withstand extreme conditions, resist wear and tear, and provide optimum protection and functionality to the armed forces.

Q:How is alloy steel used in the manufacturing of gears and shafts?: Alloy steel is commonly used in the manufacturing of gears and shafts due to its superior strength, durability, and resistance to wear and tear. Its unique properties make it ideal for withstanding high torque and heavy loads, ensuring smooth and efficient operation of gears and shafts in various industrial applications.

Q:How does special steel contribute to the automotive aftermarket?: Special steel plays a significant role in the automotive aftermarket by contributing to the development and enhancement of various automotive components. This high-quality steel is specifically engineered to possess exceptional strength, durability, and resistance to wear and tear. One of the primary ways special steel contributes to the automotive aftermarket is through the production of performance parts. These parts are designed to improve the performance and efficiency of vehicles, catering to the needs and preferences of car enthusiasts. For example, special steel is used in the manufacturing of exhaust systems, turbochargers, and intake manifolds, allowing for increased horsepower and torque, as well as improved fuel efficiency. Additionally, special steel is utilized in the production of suspension components, such as coil springs and sway bars, which provide superior handling and stability. These components not only enhance the driving experience but also ensure the safety of the vehicle and its occupants. Furthermore, special steel is instrumental in the manufacturing of braking systems, including rotors and brake calipers. These components are crucial for effective braking and maintaining control over the vehicle. By utilizing special steel, aftermarket brake systems can offer improved stopping power, reduced fade, and increased resistance to high temperatures. Moreover, special steel is employed in the production of engine components, such as crankshafts, connecting rods, and valve springs. These components are subjected to extreme forces and temperatures, and special steel's exceptional strength and heat resistance enable them to withstand such conditions, resulting in improved engine performance and longevity. In summary, special steel plays a vital role in the automotive aftermarket by contributing to the development of high-performance parts, suspension components, braking systems, and engine components. Its superior strength, durability, and resistance to wear and tear ensure improved vehicle performance, efficiency, and overall driving experience.

Q:What are the specific requirements for special steel used in the railway track industry?: The specific requirements for special steel used in the railway track industry are designed to ensure the safety, durability, and efficiency of the tracks. Firstly, the steel used for railway tracks must have a high tensile strength to withstand the heavy loads and constant stress applied by trains. This strength allows the tracks to maintain their shape and prevent deformation, ensuring smooth and stable movement of the trains. Secondly, the special steel used in railway tracks must have excellent wear resistance. As trains constantly traverse the tracks, there is significant friction and wear between the train wheels and the tracks. Therefore, the steel needs to be able to withstand this wear and tear, minimizing the need for frequent maintenance and replacement. Thirdly, the steel used in railway tracks must have good fatigue resistance. Trains exert repetitive loads on the tracks, which can lead to fatigue failure if the steel is not able to withstand this cyclic loading. Fatigue resistance ensures that the tracks remain intact and safe for prolonged periods, reducing the risk of accidents. Furthermore, the steel must have high corrosion resistance to withstand exposure to various environmental and weather conditions. Railway tracks are exposed to moisture, temperature variations, and other corrosive elements, making it crucial for the steel to have the ability to resist rust and corrosion. In addition to these mechanical and physical properties, the steel used in the railway track industry must also meet specific dimensional and geometric requirements. This includes precise dimensions, straightness, and alignment to ensure proper installation and alignment of the tracks, allowing for smooth and safe train operations. Overall, the specific requirements for special steel used in the railway track industry revolve around strength, wear resistance, fatigue resistance, corrosion resistance, and dimensional accuracy. Meeting these requirements is essential to ensure the safety, longevity, and efficiency of railway tracks, facilitating smooth and reliable train transportation.

Q:What are the properties and characteristics of special steel?: Special steel refers to a category of steel that has unique properties and characteristics, making it suitable for specific applications that require exceptional strength, durability, and resistance to various environmental factors. Some of the properties and characteristics of special steel include: 1. High Strength: Special steel is known for its exceptional strength, allowing it to withstand heavy loads and extreme conditions. This makes it ideal for applications that require structural integrity and durability, such as construction, automotive, and aerospace industries. 2. Excellent Corrosion Resistance: Special steel is often alloyed with elements like chromium and nickel, which enhance its resistance to corrosion and oxidation. This property makes it highly valuable in environments where exposure to moisture, chemicals, or extreme temperatures may cause conventional steel to deteriorate rapidly. 3. Heat Resistance: Special steel is designed to retain its mechanical properties and structural integrity even at high temperatures. It exhibits excellent thermal stability, which makes it suitable for applications involving intense heat, such as power generation, oil and gas industries, and manufacturing processes. 4. Wear Resistance: Special steel is often hardened and treated to enhance its wear resistance. This property allows it to withstand abrasive materials, friction, and erosion, making it suitable for cutting tools, machine parts, and wear-resistant components in heavy machinery. 5. Magnetic Properties: Certain types of special steel exhibit magnetic properties, which make them ideal for applications in the electrical and electronics industries. Examples include electrical transformers, motors, generators, and magnetic shielding. 6. Machinability: Special steel is designed to be easily machinable, meaning it can be shaped, formed, and fabricated into various components with precision. This property is important for industries that require complex and intricate parts that can be efficiently produced. 7. Cost-effectiveness: Despite its unique properties, special steel is often cost-effective compared to other materials with similar performance characteristics. Its long lifespan, resistance to corrosion and wear, and versatility make it a preferred choice for numerous applications, offering a balance between performance and cost. Overall, special steel combines exceptional strength, resistance to corrosion and wear, heat resistance, and magnetic properties, making it a versatile material used in various industries. Its unique properties make it an essential component in applications where standard steel or other materials would not suffice.

Q:What are the different corrosion protection techniques used for special steel?: There are several corrosion protection techniques used for special steel, including: 1. Coatings: Special steel can be coated with a variety of protective materials such as paints, epoxy, or other barrier coatings. These coatings act as a physical barrier between the steel and corrosive elements, preventing direct contact and potential damage. 2. Cathodic protection: This technique involves the use of sacrificial anodes or impressed current systems to protect the steel. Sacrificial anodes, typically made of zinc or aluminum, corrode instead of the steel, sacrificially protecting it. Impressed current systems use an external power source to provide a protective current that prevents corrosion. 3. Galvanization: Special steel can be hot-dip galvanized by immersing it in molten zinc. This creates a protective layer on the surface of the steel, significantly increasing its resistance to corrosion. 4. Alloying: Alloying the special steel with specific elements can enhance its corrosion resistance. For example, adding chromium to the steel can create a passive oxide layer that acts as a protective barrier against corrosion. 5. Passivation: Special steel can undergo passivation, a chemical process that removes free iron and other contaminants from the surface, promoting the formation of a protective oxide layer. Each of these techniques can be tailored to suit the specific requirements of the special steel and its intended application, providing effective corrosion protection and prolonging the lifespan of the material.

Q:Can special steel be recycled?: Yes, special steel can be recycled. Special steel, also known as alloy steel, is a type of steel that contains additional elements such as chromium, nickel, or molybdenum to enhance its properties. These additional elements do not hinder the recyclability of the steel. The recycling process for special steel is similar to that of regular steel. The steel is collected from various sources, such as scrap metal yards, demolition sites, or end-of-life products. It is then processed to remove impurities, sorted, and shredded into smaller pieces. The shredded steel is melted in a furnace to form molten steel, which is then cast into new products or used as raw material for manufacturing processes. Recycling special steel offers several benefits. Firstly, it helps conserve natural resources as it reduces the need for new steel production. Secondly, it reduces energy consumption and greenhouse gas emissions associated with steel manufacturing. Additionally, recycling steel helps decrease waste generation and promotes a circular economy by utilizing existing materials. Overall, special steel, like any other type of steel, can be recycled effectively, contributing to environmental sustainability and resource conservation.

Q:How is corrosion-resistant stainless tool steel used in the production of food processing equipment?: Corrosion-resistant stainless tool steel is used in the production of food processing equipment due to its ability to resist rust and corrosion caused by exposure to moisture, chemicals, and food acids. This steel is specifically designed to withstand the harsh conditions present in food processing environments, ensuring the equipment remains durable and hygienic. It is commonly used to manufacture blades, cutting tools, and various components of machines that come into direct contact with food. Its corrosion-resistant properties make it a reliable and safe choice for maintaining the quality and integrity of food during processing.

Q:How does special steel contribute to the power transmission sector?: Special steel plays a crucial role in the power transmission sector due to its exceptional properties and performance characteristics. Firstly, special steel is known for its high strength and resilience, which makes it an ideal material for manufacturing various components of power transmission systems. For instance, special steel is widely used in the production of transmission towers, where its strength ensures the stability and durability of the structures, even under extreme weather conditions. Moreover, special steel is highly resistant to corrosion, which is particularly beneficial in the power transmission sector. Power transmission equipment is often exposed to harsh environments, such as high humidity, chemical pollutants, and saltwater exposure, which can accelerate corrosion. By utilizing special steel in the manufacturing process, the risk of corrosion-related failures is significantly minimized, ensuring the reliable and uninterrupted transmission of power. Additionally, special steel offers excellent electrical conductivity, making it an ideal choice for conductors and cables used in power transmission. The efficient transfer of electrical energy is crucial to minimize power losses and optimize the transmission process. Special steel conductors provide low resistance to the flow of electricity, enabling efficient power transmission over long distances. Furthermore, special steel is also utilized in the production of transformers and other electrical equipment used in power transmission. The magnetic properties of special steel make it an excellent material for transformer cores, enabling efficient energy conversion and minimizing energy losses during transmission. In conclusion, special steel contributes significantly to the power transmission sector by offering strength, corrosion resistance, electrical conductivity, and magnetic properties. These properties ensure the reliability, efficiency, and longevity of power transmission systems, ultimately supporting the uninterrupted supply of electricity to industries, businesses, and households.

Q:What are the different surface treatment techniques for special steel?: There are several surface treatment techniques for special steel, including electroplating, hot-dip galvanizing, powder coating, and passivation. Electroplating involves depositing a thin layer of metal onto the steel surface to improve its corrosion resistance. Hot-dip galvanizing involves immersing the steel in molten zinc to create a protective coating. Powder coating involves applying a dry powder to the steel surface, which is then cured to create a durable and decorative finish. Passivation is a chemical process that removes impurities from the steel surface, enhancing its corrosion resistance.

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