Hot Forged Alloy Steel 4140 Round Bars Special Steel

Hot Forged Alloy Steel 4140 Round Bars Special Steel

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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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Main Product

Plastic Mould Steel

DIN 1.2311,1.2738,1.2083,1.2316 etc.

AISI P20,P20+Ni,420 etc.

JIS SUS420J2

Hot Work Steel

DIN 1.2344,1.2343,1.2367,1.2365,1.2581,1.2713 etc.

AISI H13,H11,H10,H21, etc.

JIS SKD61,SKD6,SKD5,SKT4 etc.

Cold Work Steel

DIN 1.2739, 1.2601, 1.2080, 1.2436, 1.2631, 1.263, 1.2510, 1.2327 etc.

AISI D2, D5, D3, D6, A8, A2, O1 etc.

JIS SKD10, SKD11, SKD1, SKS3 etc.

High Speed Steel

DIN 1.3343, 1.3243, 1.3247, 1.3355 etc.

AISI M2, M35, M42, T1 etc.

JIS SKH51, SKH35, SKH59, SKH2 etc.

Alloy Structural Steel

DIN 1.7035,1.6511,1.7220,1.7225 etc.

AISI 5140, 4340, 4135, 4140 etc.

JIS SCr440,SNCM439,SCM435,SCM440 etc.

Stainless & Carbon Steel or Others

DIN 1.4125,1.1191 etc

AISI 440C,1045, 1020 etc.

JIS SUS440C,S45C etc

Carbon Steel Round Bar	SS400, S235JR,Q235, ASTM A36, Fe360A, Fe360B,SM400A,080A15, SS41,E235B
	SAE 1020, AISI 1020, ASTM 1020, S20C, 20#, 050A20
	SAE 1045, AISI 1045, ASTM 1045, S45C, 45#,EN8, XC45, XC48, 45B, C45, CK45, CM45, 060A47, R683/IC45e
Alloy Steel Round Bar	40Cr, DIN 1.7035, SAE 5140, AISI 5140, ASTM 5140, SCr440, 41Cr4, 530A40, 42Cr4, 40X, R683/VII3
	SAE4140,42CrMo, 42CrMo4, DIN 1.7225, SCM440,EN19, 42CD4, 708M40, R683/II3
	SAE 4340, 40CrNiMoA, EN24, SNCM439, 817M40,40XMA, R683/III4
	SAE 8620,,AISI 8620, ASTM 8620, 20CrNiMo,SNCM220, 805M20
	SAE52100, AISI52100,ASTM E52100, GCr15, SUJ2, 100C6, 100Cr6, 1.3505, 534A99, IIIX15

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Hot Forged Alloy Steel 4140 Round Bars Special Steel

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 applications of special steel in the food processing industry?: Special steel is widely used in the food processing industry due to its unique properties. It is utilized for manufacturing various equipment and components that require high strength, corrosion resistance, and hygiene standards. Some applications include the production of food processing machinery, cutting tools, knives, blades, and containers. Special steel ensures durability, cleanliness, and safety, making it an indispensable material in the food processing industry.

Q: What are the different passivation techniques used for special steel?: There are several passivation techniques used for special steel, including chemical passivation, electrochemical passivation, and mechanical passivation. Chemical passivation involves using acids or other chemicals to remove surface impurities and create a protective oxide layer. Electrochemical passivation uses an electrical current to remove contaminants and promote the formation of a passive layer. Mechanical passivation involves techniques such as shot peening or sandblasting to physically clean and roughen the surface, enhancing its corrosion resistance.

Q: How does special steel contribute to the automotive racing industry?: Special steel contributes to the automotive racing industry by providing high-strength and lightweight materials that enhance the performance and safety of race cars. These steel alloys are used in various components, such as engine parts, chassis, and suspension systems, allowing for improved speed, maneuverability, and durability. Additionally, special steel's exceptional heat resistance and ability to withstand extreme conditions make it vital for engines that generate immense power and operate at high temperatures. Overall, special steel plays a crucial role in pushing the boundaries of automotive racing technology and enabling teams to achieve optimal performance on the track.

Q: How is special steel used in the production of precision tools?: Special steel is used in the production of precision tools due to its unique properties such as high strength, durability, and resistance to corrosion. This steel is carefully engineered and manufactured to meet specific requirements, enabling the production of precise and reliable tools. The use of special steel in precision tool manufacturing ensures that these tools can withstand heavy usage, maintain their sharpness, and provide accurate results, making them crucial for various industries such as automotive, aerospace, and engineering.

Q: What are the common challenges in heat treating titanium alloys?: There are various difficulties encountered when heat treating titanium alloys. One of the primary obstacles arises from titanium's strong tendency to react with oxygen, nitrogen, and hydrogen at elevated temperatures. This reactivity can lead to contamination on the surface and the creation of unwanted oxides, nitrides, or hydrides, which can adversely affect the mechanical characteristics of the alloy. Another challenge involves the development of alpha-case, a thick layer of alpha-phase titanium that forms on the alloy's surface during the heating process. This alpha-case is brittle and can significantly diminish the material's fatigue strength and ductility. Consequently, it is crucial to minimize or eliminate the formation of alpha-case during titanium alloy heat treatment. Moreover, titanium alloys have a limited temperature range for effective heat treatment. If the temperature is too low, the desired microstructure and mechanical properties may not be achieved. Conversely, if the temperature is too high, grain growth can occur, resulting in reduced strength and toughness of the alloy. Furthermore, precise control over the heating and cooling rates is often required when heat treating titanium alloys to achieve the desired microstructure and properties. Inadequate or uneven cooling can lead to non-uniform microstructures, residual stresses, or distortion of the component. Finally, the cost of heat treating titanium alloys can pose a challenge. Titanium alloys have a high affinity for oxygen, necessitating the use of specialized equipment such as vacuum furnaces or controlled atmosphere furnaces to maintain a low oxygen environment. These specialized heat treatment processes can be costly and demand careful handling and maintenance to ensure the desired outcomes. To summarize, the common challenges encountered in heat treating titanium alloys include managing reactivity with oxygen, nitrogen, and hydrogen, minimizing alpha-case formation, achieving the appropriate temperature range, controlling heating and cooling rates, and dealing with the expenses associated with specialized equipment and processes. Overcoming these challenges is essential to obtain high-quality titanium alloy components with the desired properties.

Q: What are the main corrosion resistance properties of special steel?: The main corrosion resistance properties of special steel include high resistance to rust and oxidation, good resistance to pitting and crevice corrosion, and excellent resistance to acids and alkalis. Additionally, special steel often exhibits enhanced resistance to corrosion caused by chlorides, sulfides, and other aggressive chemicals.

Q: Can special steel be used in automotive engine components?: Automotive engine components can indeed benefit from the utilization of special steel. Also referred to as alloy steel, special steel possesses enhanced properties, including increased strength, toughness, and heat resistance. These attributes make it highly suitable for the utilization in critical engine components that endure high temperatures, stress, and wear. Within the realm of automotive engines, special steel finds application in an array of components, such as crankshafts, camshafts, connecting rods, valves, and piston rings. These components encounter extreme conditions, including elevated temperatures, pressure, and rotational forces. Special steel confers the necessary strength and durability to withstand these conditions, consequently ensuring dependable engine performance and longevity. The incorporation of special steel within automotive engine components yields several advantages. Firstly, it heightens the strength and load-carrying capacity of the components, enabling them to handle greater power and torque outputs. Secondly, special steel bolsters the fatigue resistance and durability of the components, thereby diminishing the likelihood of failure and prolonging their service life. Lastly, special steel exhibits the ability to endure the high temperatures and thermal cycling experienced within the engine, thereby averting deformation and upholding dimensional stability. On the whole, the utilization of special steel in automotive engine components assumes paramount importance in the pursuit of attaining optimal performance, reliability, and longevity. It guarantees that the engine can endure the demanding conditions under which it operates, ultimately granting a smoother and more efficient driving experience.

Q: How does special steel perform in extreme cold temperatures?: Special steel is specifically designed to perform well in extreme cold temperatures. It is made using alloys that have a low temperature ductility, meaning they can withstand and maintain their structural integrity even in extremely cold conditions. This type of steel is often used in applications such as Arctic exploration, oil and gas operations in cold environments, and in the aerospace industry. One of the key properties of special steel is its ability to resist brittleness at low temperatures. Unlike regular steel, which becomes brittle and prone to cracking in extreme cold, special steel retains its toughness, making it suitable for use in sub-zero conditions. This is achieved by carefully selecting and controlling the composition of the alloy, which allows for a better balance between strength and ductility. Furthermore, special steel has excellent corrosion resistance, which is particularly important in cold environments where exposure to snow, ice, and moisture is common. The alloying elements in special steel, such as chromium and nickel, form a protective oxide layer on the surface, preventing corrosion and maintaining the structural integrity of the steel. In addition, special steel also has good thermal conductivity, which means it can efficiently transfer heat even in extreme cold temperatures. This property is crucial in applications where heat management is essential, such as in the aerospace industry or in equipment operating in cold climates. Overall, special steel is specifically engineered to perform exceptionally well in extreme cold temperatures. Its low temperature ductility, resistance to brittleness, corrosion resistance, and thermal conductivity make it a reliable and durable material for various applications in cold environments.

Q: What are the different methods for controlling the grain size in special steel?: Special steel can be controlled for grain size using various methods. One method is heat treatment, where the steel is subjected to specific temperatures and cooling rates. By controlling the rate of nucleation and growth of new grains, the grain size can be refined. For example, slow cooling encourages the formation of larger grains, while rapid cooling results in smaller grain sizes. Alloying elements can also influence grain size. Elements like vanadium, niobium, and titanium can form carbides, acting as nucleation sites and leading to finer grain sizes. Conversely, elements like aluminum and silicon promote the formation of larger grains. Mechanical deformation, such as rolling or forging, can also affect grain size. These processes break up larger grains into smaller ones, thereby refining the grain size. Techniques like equal-channel angular pressing can even produce ultrafine grains in special steel. Certain elements, like boron and zirconium, can act as grain growth inhibitors during heat treatment. By controlling the concentration of these inhibitors, grain growth can be prevented, maintaining a desired grain size. Controlling the cooling rate during solidification and heat treatment is another method for controlling grain size. By carefully managing the cooling rate, a specific grain size or desired distribution of grain sizes can be achieved. It is important to consider the specific application and desired properties of the steel when choosing a method for controlling grain size. Different methods may be combined to achieve the desired grain size and optimize the performance of the steel for its intended use.

Q: What are the different surface treatments used for special steel?: There are several different surface treatments that can be used for special steel, depending on the specific requirements and desired properties. Some of the commonly used surface treatments for special steel include: 1. Nitriding: This process involves diffusing nitrogen into the surface of the steel, resulting in a hardened layer. Nitriding improves the surface hardness, wear resistance, and fatigue strength of the steel. 2. Carburizing: Carburizing involves introducing carbon into the surface of the steel, forming a hard and wear-resistant layer. This process enhances the surface hardness and improves the steel's resistance to wear and fatigue. 3. Coating: Coating is a popular surface treatment technique where a thin layer of protective material is applied to the steel surface. Coatings can include various materials like zinc, chrome, or ceramic, which provide corrosion resistance, improved aesthetics, and enhanced durability. 4. Shot peening: Shot peening is a mechanical surface treatment technique that involves bombarding the steel surface with small metallic or ceramic particles. This process induces compressive stresses in the material, enhancing its fatigue strength and resistance to cracking. 5. Electroplating: Electroplating is a process where a thin layer of metal is deposited onto the steel surface using an electrical current. This treatment provides improved corrosion resistance and can also enhance the appearance of the steel. 6. Passivation: Passivation involves treating the steel surface with a chemical solution to remove impurities and create a protective oxide layer. This process improves the corrosion resistance and enhances the surface finish of the steel. 7. Anodizing: Anodizing is a surface treatment commonly used for aluminum but can also be applied to special steel. It involves creating an oxide layer on the steel surface through an electrolytic process. Anodizing improves corrosion resistance, provides an aesthetic finish, and can also be used for coloring the steel. These different surface treatments offer various benefits and are chosen based on the specific application requirements, such as corrosion resistance, wear resistance, hardness, aesthetics, or improved mechanical properties.

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