Special Steel ASTM4140 Alloy Steel Round Bar

Special Steel ASTM4140 Alloy Steel Round Bar System 1

Special Steel ASTM4140 Alloy 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

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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

Product show

Workshop show

Special Steel ASTM4140 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: How does special steel contribute to the telecommunications industry?: Special steel plays a crucial role in the telecommunications industry by providing the necessary strength, durability, and resistance to various environmental factors. In telecommunications, special steel is primarily used in the manufacturing of transmission towers, antenna systems, and other supporting structures. Transmission towers, for instance, are the backbone of the telecommunications network. They need to be able to withstand extreme weather conditions like strong winds, heavy precipitation, and even earthquakes. Special steel, with its high tensile strength and resistance to corrosion, ensures that these towers remain stable and operational under such challenging circumstances. Furthermore, special steel is also used in the construction of antenna systems. Antennas, whether for satellite communication or wireless networks, require materials that possess excellent electrical conductivity and low signal loss. Special steel alloys can meet these requirements, allowing for efficient signal transmission and reception. Moreover, special steel offers the advantage of being lightweight compared to other materials while maintaining its strength. This weight reduction is particularly beneficial when it comes to constructing structures that need to be installed at significant heights, such as telecommunication towers. By using special steel, telecommunications companies can achieve cost savings in both construction and transportation. Additionally, special steel's durability and resistance to corrosion make it ideal for long-term use in the telecommunications industry. These properties ensure that the structures and equipment made from special steel have an extended lifespan, reducing maintenance and replacement costs. This longevity also contributes to the overall reliability and stability of the telecommunications network. In summary, special steel's unique properties, including its strength, durability, resistance to environmental factors, and efficient signal transmission capabilities, make it an essential material in the telecommunications industry. By providing the necessary support and reliability, special steel contributes significantly to the seamless operation of communication networks, enabling efficient and reliable connectivity for individuals and businesses worldwide.

Q: What are the factors that affect the weldability of special steel?: The factors that affect the weldability of special steel include the composition of the steel, including the presence of elements such as carbon, alloying elements, and impurities; the heat treatment history of the steel; the thickness and shape of the steel; the welding process and parameters used; and the skill and experience of the welder.

Q: What are the applications of special steel in the nuclear industry?: Special steel is extensively used in the nuclear industry due to its unique properties. It is used to manufacture various components such as reactor vessels, steam generators, and fuel cladding, which require high strength, corrosion resistance, and heat resistance. Special steel ensures the safety and efficiency of nuclear power plants by withstanding extreme temperatures, pressures, and corrosive environments. Its applications in the nuclear industry are crucial for maintaining the integrity and reliability of nuclear facilities.

Q: What are the main factors affecting the heat resistance of special steel?: The main factors affecting the heat resistance of special steel include its alloy composition, microstructure, and heat treatment. Alloy composition plays a crucial role in determining the heat resistance of special steel. The addition of specific elements such as chromium, nickel, molybdenum, and tungsten can enhance the steel's ability to withstand high temperatures. These alloying elements form stable oxide layers on the surface of the steel, which act as a barrier against oxidation and corrosion at elevated temperatures. The microstructure of special steel also influences its heat resistance. The steel's grain size, distribution of phases, and the presence of precipitates can affect its thermal stability. Fine-grained structures and a homogeneous distribution of phases help improve the steel's resistance to creep, which is the deformation that occurs under prolonged exposure to high temperatures. Additionally, the presence of precipitates, such as carbides or intermetallic compounds, can provide strengthening mechanisms that enhance the steel's resistance to thermal softening. Heat treatment processes, such as quenching and tempering, can significantly impact the heat resistance of special steel. Proper heat treatment can optimize the microstructure and enhance the steel's mechanical properties, including its resistance to thermal degradation. For instance, a well-controlled quenching process can promote the formation of a martensitic structure, which increases the steel's hardness and strength at high temperatures. Other factors that can affect the heat resistance of special steel include the presence of impurities, surface conditions, and environmental factors. Impurities, such as sulfur and phosphorus, can reduce the steel's resistance to high temperatures by promoting the formation of brittle phases or facilitating oxidation. Surface conditions, such as roughness or the presence of cracks, can lead to localized heating and accelerated degradation. Environmental factors, such as the presence of corrosive gases or high humidity, can also influence the steel's heat resistance by promoting oxidation or corrosion processes. In summary, the heat resistance of special steel is influenced by its alloy composition, microstructure, heat treatment, impurities, surface conditions, and environmental factors. Understanding and optimizing these factors are crucial for developing special steel with superior heat resistance for various industrial applications.

Q: How is special steel used in the telecommunications supply chain?: Special steel is used in the telecommunications supply chain for a variety of applications. It is commonly used in the manufacturing of telecommunication towers, antennas, and satellite dishes due to its high strength and durability. Special steel is also utilized in the production of transmission lines, cables, and connectors, where its corrosion resistance and electrical conductivity properties are essential. Additionally, special steel is employed in the fabrication of equipment racks, cabinets, and enclosures, providing a sturdy and secure housing for telecommunication devices. Overall, special steel plays a crucial role in ensuring the reliability and performance of telecommunications infrastructure.

Q: What are the different casting techniques used for special steel?: There are several casting techniques used for special steel, including investment casting, sand casting, centrifugal casting, and continuous casting. Each technique has its own advantages and is suitable for specific applications. Investment casting is known for its precision and ability to produce intricate shapes, while sand casting is cost-effective and versatile. Centrifugal casting is used to create cylindrical shapes with high strength, and continuous casting is employed for mass production of steel products.

Q: How does special steel perform in cryogenic gas environments?: Special steel performs well in cryogenic gas environments due to its low temperature resistance and high strength. It has excellent toughness and can withstand extreme cold temperatures without becoming brittle or undergoing significant deformation. This makes it ideal for applications such as cryogenic storage tanks, pipelines, and equipment used in industries like aerospace, energy, and scientific research, where materials need to maintain their integrity and performance in extremely cold conditions.

Q: What are the different standards and specifications for special steel?: There are several standards and specifications for special steel, which vary depending on the specific type and application of the steel. Some common standards include AISI (American Iron and Steel Institute), ASTM (American Society for Testing and Materials), EN (European Norm), and JIS (Japanese Industrial Standards). These standards define the chemical composition, mechanical properties, and manufacturing processes required for special steel to meet certain quality and performance standards. Additionally, there may be specific specifications for different industries or applications, such as aerospace, automotive, or construction, that further define the requirements for special steel.

Q: What are the advantages of using special steel in specific applications?: Using special steel in specific applications brings several advantages. Firstly, special steel outperforms regular steel in terms of strength and durability. It possesses higher tensile strength and better resistance to wear and tear, making it ideal for demanding industries like construction, automotive, and aerospace. This ensures that components made from special steel can withstand heavy loads, extreme temperatures, and harsh operating conditions without any deformation or failure. Secondly, special steel demonstrates exceptional corrosion resistance. It can effectively combat the detrimental effects of moisture, chemicals, and other corrosive elements, making it suitable for marine environments, chemical processing plants, and offshore structures. Special steel maintains its structural stability and integrity even when exposed to aggressive substances, which ultimately prolongs the lifespan of equipment and reduces maintenance costs. Another advantage of special steel lies in its versatility. It can be easily customized and tailored to meet the specific requirements of various applications. Special steel can be engineered to possess specific mechanical properties, such as hardness, toughness, or flexibility, depending on the desired application. This enables greater adaptability and empowers designers and engineers to create components that are optimized for their intended use. Furthermore, special steel often exhibits excellent heat resistance capabilities. It can endure high temperatures without sacrificing its mechanical properties, making it suitable for applications involving extreme heat, such as industrial furnaces, turbines, and engines. The steel's ability to withstand heat ensures that it retains its strength and shape, minimizing the risk of deformation or failure under elevated temperatures. Lastly, special steel offers superior machinability and weldability. It can be easily shaped, cut, and welded into intricate shapes and structures, facilitating efficient manufacturing processes and reducing production costs. Special steel's machinability also guarantees precise and accurate fabrication, resulting in high-quality components that meet stringent industry standards. In conclusion, special steel provides enhanced strength, durability, corrosion resistance, versatility, heat resistance, and excellent machinability, making it the preferred choice for various industries where reliability, performance, and longevity are crucial.

Q: Can special steel be used in the aerospace parts manufacturing industry?: Yes, special steel can be used in the aerospace parts manufacturing industry. Special steel alloys, such as stainless steel or high-strength alloys like titanium, are commonly utilized in the aerospace industry due to their excellent strength, durability, corrosion resistance, and heat resistance properties. These materials are vital for manufacturing critical components like aircraft engines, landing gears, and structural parts, ensuring safety and performance in demanding aerospace applications.

Send your message to us

*Email

*TEL

*Quantity

*Unit