SAE1045 4140 4340 8620 8640 Alloy Steel Bar

SAE1045 4140 4340 8620 8640 Alloy Steel Bar

Ref Price:: $300.00 - 500.00 / m.t.

Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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The details of our Steel

1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard

2. Produce processes: Smelt Iron -EAF smelt Billet - ESR smelt Billet -Hot rolled or forged get the steel round bar and plate

3. Heat treatment:Normalized / Annealed / Quenched+Tempered

4. Quality assurance:

All order we can received Third party inspection, You can let SGS, BV,.. and others test company test and inspect our products before Goods shipping.

Product information

Specification of S45C steel
Round bar	Diameter(mm)	Length (mm)
	100~300	2000~5800
Plate	Thickness(mm)	Width (mm)	Length (mm)
	20~70	105~610	2000~5800
The specification can be customised!

Heat treatment

1.Quench:1000-1040`C via 600`C and 850`C, preheating oil or wind cooling

2.Temper temperature should be higher than working temperature in order to stabilize the working size of mold

3.Heat up to 650°C of average temperature in order to eliminate the machined stress, 500 °c air cooling after electric cooker cooling

4.Tempering, 800-850 °c ,slow cooling after diathermia

5. Melting Process of SKD61 steel rod

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SAE1045 4140 4340 8620 8640 Alloy Steel Bar

Q:What are the different special steel products available in the market?: In the market, one can find a wide range of special steel products that are specifically designed to meet various industrial needs. Some commonly used special steel products include: 1. Stainless Steel: This particular steel alloy is highly resistant to corrosion due to its minimum chromium content of 10.5%. It finds extensive use in applications that demand exceptional corrosion resistance, such as kitchen utensils, medical instruments, and chemical processing equipment. 2. Tool Steel: Tool steel is a type of carbon and alloy steel that is exclusively manufactured for tool production. It is renowned for its high hardness, resistance to abrasion, and ability to maintain sharp edges. Tool steel is widely employed in the fabrication of cutting tools, dies, and molds. 3. Alloy Steel: Alloy steel is a type of steel that has been blended with other elements like manganese, silicon, nickel, or chromium to enhance its mechanical properties. It offers superior strength, toughness, and wear resistance compared to carbon steel. Alloy steel is used in various applications, including automotive components, construction equipment, and machinery parts. 4. High-Speed Steel: High-speed steel is a variant of tool steel that exhibits the ability to cut at high speeds without compromising its hardness or its ability to retain sharp edges. It is commonly utilized in the production of drills, milling cutters, and saw blades. 5. Spring Steel: Spring steel is a low-alloy, medium or high carbon steel that possesses remarkable shape retention and elasticity even under high stress or repeated loadings. It finds extensive use in the manufacturing of springs, suspension systems, and shock absorbers. 6. Electrical Steel: Electrical steel, also known as silicon steel, is an exceptional steel alloy that demonstrates low electrical losses and high magnetic permeability. It is employed in the fabrication of electrical transformers, motors, and generators. 7. Heat-Resistant Steel: Heat-resistant steel is specifically engineered to withstand high temperatures without compromising its mechanical properties. It is commonly utilized in applications such as furnaces, heat exchangers, and gas turbines. These examples merely scratch the surface of the wide array of special steel products available in the market. The selection of a particular steel product depends on the specific requirements of the application, including factors like corrosion resistance, strength, hardness, and heat resistance.

Q:What are the different coating techniques for special steel parts?: Various techniques can be utilized to coat special steel parts, depending on specific requirements and desired properties. Below are some commonly employed coating techniques: 1. Electroplating: Through an electrochemical process, a layer of metal is deposited onto the steel part's surface. This technique offers exceptional corrosion resistance and can enhance the part's appearance. 2. Thermal spraying: Coating material is melted or heated and then sprayed onto the steel surface. Flame spraying, plasma spraying, or arc spraying methods can be utilized. Thermal spraying is commonly employed to provide wear resistance, thermal insulation, or to restore damaged parts. 3. PVD (Physical Vapor Deposition): In this vacuum coating technique, a thin film is deposited onto the steel surface. PVD offers a variety of coatings, including decorative finishes, hard coatings for wear resistance, and low-friction coatings. 4. DLC (Diamond-Like Carbon) coating: DLC is a type of PVD coating that applies a thin layer of carbon-based material with properties resembling that of diamond. It delivers excellent hardness, low friction, and high wear resistance, making it suitable for applications requiring durability and performance. 5. Powder coating: Dry powder is applied to the steel part and then cured via heat or ultraviolet light. This technique delivers a durable and appealing finish, offering outstanding corrosion resistance and protection against impact and abrasion. 6. Chemical conversion coating: A chemical solution is used to treat the steel surface, forming a protective layer. Phosphating, chromating, and anodizing are common types of chemical conversion coatings. These coatings enhance corrosion resistance, paint adhesion, and can provide electrical conductivity. Choosing the appropriate coating technique for special steel parts is crucial, considering factors such as desired properties, environmental conditions, cost-effectiveness, and specific application requirements.

Q:What are the different coating techniques used for special steel?: Some of the different coating techniques used for special steel include hot-dip galvanizing, electroplating, powder coating, and metallizing.

Q:How does special steel perform in high-frequency applications?: High-frequency applications benefit greatly from special steel, also known as high-speed steel (HSS), due to its remarkable performance. This steel is specifically engineered to endure the intense heat and stress encountered during high-speed machining operations. The distinctive composition of special steel, which typically includes elements like tungsten, molybdenum, cobalt, and vanadium, grants it exceptional hardness, toughness, and resistance to wear. These properties make it highly suitable for high-frequency applications that involve rapid cutting speeds and frequent abrasion. Special steel's excellent hardness allows it to maintain its cutting edge even at elevated temperatures, ensuring superior performance in high-frequency applications. It experiences minimal deformation or loss of cutting efficiency, resulting in increased productivity and tool longevity. Additionally, its exceptional wear resistance enables it to withstand the constant friction and heat generated during high-speed machining operations, thus preventing premature tool failure. Furthermore, special steel possesses excellent thermal conductivity, which aids in dissipating the heat produced during high-frequency applications. This characteristic is crucial for preserving dimensional stability and preventing warping or distortion under extreme temperatures. Consequently, special steel tools can maintain their precision and accuracy even during prolonged high-frequency operations. In conclusion, special steel's exceptional hardness, toughness, wear resistance, and thermal conductivity make it highly effective in high-frequency applications. Its ability to withstand extreme heat and stress while preserving cutting performance and dimensional stability has established it as the preferred choice in industries such as aerospace, automotive, and manufacturing, where high-speed machining is indispensable.

Q:What are the main advantages of using special steel in the construction industry?: The main advantages of using special steel in the construction industry are its high strength and durability, which allows for the construction of structures that can withstand heavy loads and harsh environmental conditions. Special steel also offers excellent resistance to corrosion, making it suitable for use in coastal or industrial areas. Additionally, special steel is highly versatile and can be easily fabricated and shaped, providing flexibility in design and construction.

Q:How does special steel resist deformation under load?: The unique composition and manufacturing techniques of special steel are specifically designed to prevent deformation under load. Its high strength is one of the key factors contributing to this resistance. Special steel is typically alloyed with elements like chromium, nickel, and molybdenum, which enhance its mechanical properties and make it stronger than regular steel. This increased strength allows the steel to bear heavier loads without significant deformation occurring. In addition, special steel often undergoes specialized heat treatment processes like quenching and tempering. These processes alter the steel's microstructure, resulting in a fine-grained structure and increased hardness. The fine-grained structure helps distribute the applied load more evenly, reducing the risk of localized deformation. Furthermore, special steel can exhibit exceptional toughness, meaning it can absorb a significant amount of energy before fracturing. Achieving this toughness involves carefully controlling the steel's chemical composition and manufacturing processes, such as controlling cooling rates during heat treatment. The ability to absorb energy without undergoing deformation further enhances its resistance to load-induced deformation. Moreover, special steel can possess superior fatigue resistance, allowing it to withstand repeated loading and unloading cycles without deformation. This is achieved by eliminating impurities and controlling the steel's grain structure, reducing the initiation and propagation of cracks that can lead to deformation. In conclusion, the combination of high strength, fine-grained structure, toughness, and fatigue resistance in special steel enables it to resist deformation under heavy loads. These characteristics are meticulously engineered and optimized during the manufacturing process to ensure that the steel can withstand intended applications and loads without significant deformation occurring.

Q:What are the different corrosion-resistant special steel alloys?: There are several corrosion-resistant special steel alloys that are commonly used in various industries. Some of the most popular ones include stainless steel, duplex stainless steel, super duplex stainless steel, and nickel-based alloys. Stainless steel is a widely used corrosion-resistant alloy that contains a minimum of 10.5% chromium. It forms a protective layer of chromium oxide on its surface, preventing further corrosion. Stainless steel is highly resistant to rust, staining, and pitting, making it suitable for applications in the food processing, chemical, and marine industries. Duplex stainless steel is a combination of both austenitic and ferritic stainless steels. It offers excellent resistance to corrosion, particularly in environments with high chloride ion concentrations. Duplex stainless steel is commonly used in the oil and gas, chemical, and desalination industries. Super duplex stainless steel is a higher strength version of duplex stainless steel. It offers enhanced corrosion resistance and mechanical properties, making it ideal for applications in harsh environments such as offshore oil and gas platforms, chemical processing plants, and seawater desalination systems. Nickel-based alloys, such as Inconel and Hastelloy, are known for their exceptional resistance to corrosion and high-temperature environments. These alloys are commonly used in industries such as aerospace, chemical processing, and power generation, where resistance to both corrosion and heat is critical. These corrosion-resistant special steel alloys provide various options for industries that require materials with excellent durability and resistance to corrosive environments. The choice of alloy depends on the specific application, operating conditions, and desired performance characteristics.

Q:How does special steel perform in cryogenic environments?: Special steel performs exceptionally well in cryogenic environments. Cryogenic temperatures refer to extremely low temperatures below -150°C (-238°F), and special steel is specifically designed to withstand and excel in such conditions. One of the key properties of special steel is its ability to maintain its strength and toughness even at low temperatures. Unlike other materials that become brittle and prone to fractures in cryogenic environments, special steel retains its mechanical properties, ensuring structural integrity and reliability. This characteristic is crucial in applications where safety is paramount, such as in the aerospace and nuclear industries. Moreover, special steel exhibits excellent resistance to corrosion and oxidation, even at cryogenic temperatures. This resistance is essential as cryogenic environments often involve the presence of gases, liquids, or chemicals that can accelerate corrosion. Special steel's resistance to corrosion ensures its longevity and minimizes the risk of material degradation, thereby enhancing the overall performance and lifespan of equipment or structures. In addition to its mechanical and corrosion-resistant properties, special steel also possesses good thermal conductivity. This property allows for efficient heat transfer, which is particularly important in cryogenic environments where temperature control and management are critical. The ability of special steel to efficiently conduct heat ensures that equipment and structures remain at the desired low temperatures without any significant thermal variations. Furthermore, special steel's suitability for cryogenic environments is evident in its wide range of applications. It is commonly used in cryogenic storage tanks for liquefied gases, such as liquid oxygen, nitrogen, and argon. Special steel is also employed in the construction of cryogenic pipelines, valves, and other components, where its exceptional performance ensures the safe transport and containment of cryogenic fluids. In conclusion, special steel performs exceptionally well in cryogenic environments due to its retained strength and toughness, resistance to corrosion, good thermal conductivity, and wide range of applications. Its ability to withstand extreme cold temperatures makes it a reliable and preferred choice for various industries requiring dependable performance in cryogenic conditions.

Q:What are the mechanical properties of special steel?: Special steels, also known as alloy steels, possess enhanced mechanical properties compared to regular carbon steels. These properties vary depending on the specific alloying elements and their concentration. Some common mechanical properties of special steel include: 1. High tensile strength: Special steels are known for their exceptional strength, making them suitable for applications that require high load-bearing capacity. The tensile strength of these steels can range from 500 MPa to over 2,000 MPa, depending on the composition. 2. Improved hardness: Alloying elements in special steels can significantly increase their hardness. This property is desirable for applications that require resistance to wear and abrasion. Special steels can achieve hardness levels ranging from 200-600 HB (Brinell hardness), depending on the specific alloy composition and heat treatment. 3. Good toughness: Special steels often exhibit good toughness, which refers to the ability to absorb energy before fracturing. This property is crucial for components subjected to impact or dynamic loading. The combination of high strength and toughness makes special steels suitable for demanding applications such as automotive parts or industrial machinery. 4. Excellent fatigue resistance: Special steels are designed to withstand cyclic loading without failure. They exhibit enhanced fatigue resistance, allowing them to endure repeated stress cycles without compromising their structural integrity. This property makes special steels ideal for critical components in aerospace, automotive, and machinery industries. 5. Superior corrosion resistance: Depending on the alloy composition, special steels can offer improved corrosion resistance compared to regular carbon steels. The addition of elements like chromium, nickel, or molybdenum helps to form protective oxide layers on the surface, preventing corrosion and increasing durability. 6. High temperature resistance: Some special steels are specifically formulated to perform well at elevated temperatures. They possess excellent heat resistance and can retain their mechanical properties even at extreme temperatures. This property is crucial for applications such as turbine blades, exhaust systems, or high-temperature furnaces. It is important to note that the specific mechanical properties of special steel can vary widely depending on the specific alloy composition, heat treatment, and processing techniques used. Therefore, it is essential to consult the material specifications or consult with experts to determine the exact mechanical properties of a particular special steel.

Q:How is special steel used in the manufacturing of bearings?: Due to its unique properties, special steel is utilized in the production of bearings, which are vital components employed in various industries. These bearings serve the purpose of reducing friction between moving parts, promoting smooth motion, and supporting heavy loads. The utilization of special steel guarantees exceptional performance and longevity. For the production of bearings, the preferred choice of special steel includes stainless steel and high-carbon chromium steel. This selection is based on the remarkable strength, hardness, and resistance to corrosion that these types of steel possess. These properties enable the bearings to endure heavy loads, withstand wear and tear, and operate effectively in challenging environments. The manufacturing process for bearings involves shaping and heat treatment. Initially, special steel is melted and cast into the desired form, typically a ring or a ball. Subsequently, the steel undergoes various heat treatment procedures like annealing, quenching, and tempering to enhance its hardness, toughness, and overall mechanical properties. This heat treatment ensures that the steel is adequately hardened to endure the stress and friction it will encounter during operation. Once the steel has undergone appropriate heat treatment, it is machined and ground to attain precise dimensions and smooth surfaces. This step is vital to ensure that the bearings possess the necessary tolerance and can rotate smoothly without any interference. Special steel's machinability and grindability simplify the achievement of the required accuracy and surface finish. Following the machining process, the bearings can be assembled with other components and lubricated to ensure proper lubrication and minimize friction. Special steel's corrosion resistance is particularly valuable at this stage as it shields the bearings from rust and degradation caused by moisture or aggressive environments. In conclusion, special steel is chosen for the production of bearings due to its exceptional strength, hardness, and corrosion resistance. These properties enable the bearings to withstand heavy loads, resist wear, and function effectively in challenging conditions. With the aid of its excellent machinability and grindability, special steel guarantees the attainment of the necessary precision and surface finish. Overall, special steel plays a pivotal role in the production of high-quality bearings that enable efficient and reliable motion in various industries.

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