Special Steel SAE4140 Alloy Steel Bar 42CrMo4

Special Steel SAE4140 Alloy Steel Bar 42CrMo4 System 1

Special Steel SAE4140 Alloy Steel Bar 42CrMo4

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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

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	SCM440

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Special Steel SAE4140 Alloy Steel Bar 42CrMo4

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Special Steel SAE4140 Alloy Steel Bar 42CrMo4

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 different corrosion protection methods used for special steel?: There are several corrosion protection methods used for special steel to ensure its durability and longevity. These methods include: 1. Coatings: Applying various types of coatings, such as paint, epoxy, or zinc, can provide a protective layer on the steel surface. These coatings act as a barrier, preventing moisture and corrosive elements from coming into direct contact with the steel. 2. Galvanization: Galvanizing is a process that involves coating the steel with a layer of zinc. This creates a sacrificial barrier, as the zinc corrodes instead of the steel. Galvanized steel is commonly used in outdoor applications, such as fences, poles, and roofing. 3. Stainless steel: Special steel can also be manufactured using stainless steel, which contains a high percentage of chromium. Chromium forms a passive layer on the surface of the steel, providing excellent corrosion resistance. Stainless steel is widely used in industries such as construction, food processing, and medical equipment. 4. Cathodic protection: This method involves creating an electrical current or using sacrificial anodes to protect the steel. By introducing a more reactive metal (sacrificial anode) or applying an electrical current, corrosion is minimized as the reactive metal corrodes instead of the steel. 5. Alloying: Modifying the composition of the steel by adding elements like nickel, molybdenum, or copper can enhance its resistance to corrosion. These alloying elements form a protective layer on the surface, making the steel more resistant to rust and other forms of corrosion. 6. Passivation: Passivation is a chemical process that removes free iron from the surface of the steel and forms a protective oxide layer. This layer acts as a barrier against corrosion, enhancing the steel's resistance to rust and other forms of corrosion. 7. Proper maintenance: Regular inspection, cleaning, and maintenance of special steel are essential in preventing corrosion. Removing dirt, debris, and other contaminants from the steel's surface can help maintain its protective coatings and prevent corrosion from occurring. It is important to select the appropriate corrosion protection method based on the specific application and environmental conditions to ensure the long-term performance and durability of special steel.

Q:How does special steel perform in high-vibration environments?: Special steel is specifically designed to withstand high-vibration environments. Its unique composition and metallurgical properties make it highly resistant to fatigue, cracking, and deformation caused by vibrations. Additionally, special steel exhibits superior damping capacity, effectively absorbing and dissipating vibrations, thus reducing the risk of structural damage or failure in high-vibration environments.

Q:What are the advantages of using special steel in aerospace applications?: The utilization of special steel in aerospace applications brings forth numerous benefits. Firstly, it possesses exceptional mechanical properties and high strength, rendering it suitable for enduring the extreme conditions encountered within the aerospace industry. Its capability to withstand high temperatures, pressures, and vibrations guarantees the safety and reliability of aircraft components. Secondly, special steel offers remarkable resistance to corrosion, a critical characteristic in aerospace applications. As aircraft are exposed to harsh environments, including moisture, atmospheric gases, and various chemicals, the corrosion resistance of special steel prevents degradation and maintains the structural integrity of the aircraft. This, in turn, reduces the frequency of maintenance and repair requirements. Furthermore, special steel exhibits excellent fatigue resistance, enabling it to endure repeated loading cycles without compromising its structural integrity. This characteristic is particularly significant in aerospace applications, where components are subjected to cyclic loading due to takeoffs, landings, and turbulence. By utilizing special steel, the risk of fatigue failure is significantly minimized, ensuring the longevity and safety of the aircraft. Moreover, special steel offers favorable weldability and formability, allowing for the production of intricate and complex aerospace components. This flexibility in manufacturing processes permits customization and optimization of designs, resulting in lightweight yet robust structures. The incorporation of special steel in aerospace applications contributes to overall weight reduction of aircraft, thereby enhancing fuel efficiency and increasing payload capacity. In conclusion, the advantages of employing special steel in aerospace applications encompass its high strength, exceptional mechanical properties, corrosion resistance, fatigue resistance, weldability, and formability. These characteristics make it an ideal material for withstanding the demanding conditions experienced in the aerospace industry, ensuring the safety, reliability, and efficiency of aircraft.

Q:Can special steel be used in the production of musical instruments?: Yes, special steel can be used in the production of musical instruments. Special steel, also known as tool steel or high-performance steel, is a type of steel that has been specifically designed to possess certain properties that make it suitable for specific applications. These properties include high strength, durability, and resistance to wear and corrosion. In the case of musical instruments, special steel can be used in various components, such as strings, springs, keys, valves, and reeds. For example, piano strings are typically made from high-carbon steel, which provides the necessary strength and elasticity for producing the desired sound. Brass instruments like trumpets or saxophones have valves made from special steel alloys that have excellent corrosion resistance and can withstand the repetitive movements required for playing the instrument. In addition, special steel can also be used in the manufacturing of instrument parts like guitar frets. Frets are metal strips embedded along the fingerboard of a guitar, and they need to be made from a material that is durable, wear-resistant, and able to hold its shape over time. Special steel alloys, such as stainless steel or nickel-silver, are commonly used for this purpose. Overall, special steel offers a range of properties that can enhance the performance and longevity of musical instruments. By using this type of steel, manufacturers can create instruments that produce high-quality sound, are more resistant to wear and tear, and have a longer lifespan.

Q:What is the significance of special steel in the medical field?: Special steel, which is also referred to as medical grade steel, holds a vital role in the medical field due to its distinct properties and importance. Specifically designed and produced to meet the strict requirements of the healthcare industry, special steel's significance in the medical field can be grasped through the following points: 1. Biocompatibility: Special steel demonstrates biocompatibility, meaning it is non-toxic and does not elicit an adverse reaction when it comes into contact with the human body. This makes it an ideal material for medical devices like surgical instruments, implants, and orthopedic tools. 2. Resistance to corrosion: Special steel exhibits high resistance to corrosion and rust, ensuring the endurance and durability of medical instruments. Instruments used in surgical procedures require repeated sterilization, and the corrosive nature of sterilization agents can degrade ordinary steel. Special steel, with its superior resistance to corrosion, can withstand these harsh conditions, decreasing the risk of contamination and preserving the integrity of medical equipment. 3. Mechanical properties: Special steel possesses exceptional mechanical properties, such as high strength, toughness, and ductility. These characteristics are crucial for medical devices as they need to endure the stresses and strains of surgical procedures, maintain their shape, and deliver reliable performance. 4. Compatibility with sterilization: Special steel can withstand various sterilization methods, including steam sterilization, ethylene oxide sterilization, and gamma radiation. This guarantees that medical instruments made from special steel can be effectively sterilized, preventing the transmission of infections and minimizing the risk of contamination during surgeries. 5. Precision manufacturing: Special steel can be shaped into intricate forms and sizes, enabling the production of precise medical instruments. Its superior machinability allows for the creation of fine and sharp edges, which are vital for surgical tools used in delicate procedures. 6. Antibacterial properties: Certain special steels, such as stainless steel, possess inherent antibacterial properties. This characteristic is particularly crucial in the medical field, where preventing infections is of utmost importance. Instruments made from antibacterial special steel can hinder the growth of bacteria, minimizing the risk of post-operative complications. In conclusion, the significance of special steel in the medical field lies in its biocompatibility, resistance to corrosion, mechanical properties, compatibility with sterilization, precision manufacturing, and potential antibacterial properties. These qualities render special steel an indispensable material for the manufacturing of medical devices, ensuring their dependability, durability, and safety for both healthcare professionals and patients.

Q:How is special steel used in the marine supply chain?: Special steel is used in the marine supply chain for various purposes. It is commonly used in the construction of ships and offshore structures due to its high strength and corrosion resistance properties. Special steel is also used in the manufacturing of marine equipment such as propellers, shafts, and valves, ensuring reliable performance and durability in harsh marine environments. Additionally, special steel plays a crucial role in the production of marine components, ensuring the safety and efficiency of the marine supply chain.

Q:What are the challenges in machining special steel?: Machining special steel presents several challenges due to its unique properties. Firstly, special steel is known for its high hardness, which makes it difficult to cut and shape without proper tools and techniques. Additionally, special steel often contains alloying elements that increase its strength and resistance to wear, but also make it more prone to work hardening and heat buildup during machining. This requires careful selection of cutting parameters and cooling methods to prevent tool wear and surface damage. Furthermore, the presence of impurities or non-metallic inclusions in special steel can cause tool chipping or premature failure, necessitating the use of specialized tooling and processes. Overall, the challenges in machining special steel lie in its hardness, work hardening tendencies, heat generation, and the need for precision tools and techniques.

Q:What are the common applications of special steel?: Special steel has a wide range of applications in various industries. It is commonly used in the construction and automotive sectors for manufacturing components that require high strength, durability, and resistance to corrosion. Special steel is also utilized in the production of machinery and tools, such as cutting blades, drill bits, and gears, due to its excellent hardness and wear resistance. Additionally, it finds its application in the energy sector, particularly in the manufacturing of turbines, generators, and oil drilling equipment, where its high temperature and pressure resistance are vital.

Q:How does special steel contribute to reducing production costs?: Special steel contributes to reducing production costs in several ways. Firstly, special steel has higher strength and durability compared to regular steel, which means that it can be used to make lighter and more efficient components. This leads to reduced material usage and lower costs. Additionally, special steel has superior corrosion resistance, which prolongs the lifespan of machinery and equipment, reducing the need for frequent repairs or replacements. Moreover, special steel can be customized to specific requirements, allowing for more precise manufacturing processes, minimizing waste, and optimizing production efficiency. Overall, special steel helps in minimizing material costs, maintenance expenses, and maximizing productivity, leading to significant reductions in production costs.

Q:How does special steel perform in high-temperature oxidation conditions?: Special steel performs well in high-temperature oxidation conditions due to its exceptional resistance to oxidation and formation of protective oxide layers, which helps prevent corrosion and maintain its strength and integrity even at elevated temperatures.

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