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 requirements for special steel used in transportation equipment manufacturing?: The requirements for manufacturing special steel used in transportation equipment are diverse and depend on the specific application. However, there are common requirements that apply universally. First and foremost, transportation equipment requires special steel that is strong and durable. It must withstand the demanding conditions of transportation, including heavy loads, vibrations, and impacts. To ensure the safety and structural integrity of the equipment, high tensile strength and toughness are essential. Secondly, the special steel must have excellent resistance to corrosion. Transportation equipment is exposed to different environmental factors like moisture, salt, chemicals, and extreme temperatures. Corrosion can weaken the steel and compromise the equipment's performance and lifespan. Therefore, it is crucial to use corrosion-resistant special steel to ensure durability and reliability. In addition, the special steel used in manufacturing transportation equipment should be easily weldable and formable. It should be capable of being shaped and joined together efficiently through welding or other methods. This allows for the production of complex structures and components, enabling the manufacturing of transportation equipment with intricate designs and specifications. Furthermore, the special steel should have good resistance to fatigue. Fatigue failure can occur due to repeated loading and unloading cycles, which are common in transportation equipment. The special steel should be able to withstand these cycles without developing fatigue cracks or failing, ensuring the long-term reliability of the equipment. Lastly, special steel used in transportation equipment manufacturing must meet industry standards and regulations. Depending on the specific application and region, there may be legal requirements and safety standards that need to be met. This can include certifications like ISO, ASTM, or other relevant standards to ensure the quality and performance of the steel. In summary, the requirements for special steel used in transportation equipment manufacturing include high strength, durability, corrosion resistance, good weldability and formability, fatigue resistance, and compliance with industry standards. Meeting these requirements is crucial to ensure the safety, reliability, and longevity of transportation equipment.

Q:What are the casting methods for special steel?: There are several casting methods used for special steel, including the traditional sand casting method, investment casting, and continuous casting. Each method has its own advantages and is chosen based on factors such as the complexity of the steel shape, desired surface finish, and production volume.

Q:What are the requirements for special steel used in food processing equipment?: The requirements for special steel used in food processing equipment include high corrosion resistance to prevent contamination, excellent hygiene and cleanability properties, high strength and durability to withstand heavy usage, and compliance with food safety regulations and standards.

Q:What are the environmental impacts of special steel production?: The environmental impacts of special steel production include air pollution from the combustion of fossil fuels used in the production process, water pollution from the discharge of wastewater containing heavy metals and chemicals, and land degradation from mining activities to extract raw materials. Additionally, the high energy intensity of steel production contributes to greenhouse gas emissions, contributing to climate change.

Q:How is martensitic steel used in knife making?: Martensitic steel is commonly used in knife making due to its high hardness and excellent edge retention properties. Its ability to be heat treated and tempered makes it ideal for creating sharp and durable knife blades. The steel's fine grain structure allows for precise and detailed work, resulting in high-quality and long-lasting knives.

Q:What is the role of heat treatment in special steel?: The role of heat treatment in special steel is to enhance its mechanical properties and improve its performance by altering its microstructure through controlled heating and cooling processes. This helps to achieve desired properties such as increased hardness, strength, toughness, and ductility, as well as improved wear resistance and corrosion resistance. Heat treatment also allows for the refinement of grain structure, elimination of internal stresses, and modification of the steel's crystalline structure, which ultimately improves the overall quality and usability of special steel in various applications.

Q:How is special steel used in the mining manufacturing process?: Special steel is used in the mining manufacturing process for various applications. It is commonly utilized in the construction of mining equipment such as drilling machines, excavators, and crushers due to its high strength and durability. Special steel is also used to make wear-resistant components for mining machinery, ensuring their longevity in harsh operating conditions. Additionally, special steel is employed to manufacture conveyor belts, pipes, and structural supports needed in mining operations. Overall, the use of special steel in the mining manufacturing process enhances the efficiency, reliability, and safety of mining equipment and infrastructure.

Q:Can special steel be used in the automotive racing industry?: Yes, special steel can be used in the automotive racing industry. Special steel alloys, such as high-strength and lightweight materials, can enhance the performance, durability, and safety of race cars. These alloys can be used in various components like engine parts, chassis, suspension systems, and roll cages to improve overall performance and reduce weight.

Q:What are the challenges in heat treatment of special steel alloys?: The heat treatment of special steel alloys presents various difficulties due to their unique composition and properties. One of the primary obstacles is attaining the desired microstructure and mechanical properties while maintaining dimensional stability. Special steel alloys often contain intricate alloying elements and necessitate specific heat treatment processes to achieve the desired properties. Another hurdle involves controlling the rates of heating and cooling throughout the heat treatment procedure. Special steel alloys are often sensitive to rapid or uneven temperature changes, which can lead to distortion, cracking, or the formation of undesirable phases. Hence, ensuring precise control of the heating and cooling rates is crucial to avoid these issues and ensure uniformity in the final product. Furthermore, the presence of alloying elements in special steel alloys can increase their hardenability, making it challenging to achieve the desired hardness consistently across the entire component. Adequate attention must be given to selecting appropriate heat treatment parameters, including temperatures, soaking times, and quenching media, in order to achieve the desired hardness and prevent excessive hardness gradients. Additionally, special steel alloys are prone to oxidation and decarburization during heat treatment due to their high alloy content and exposure to elevated temperatures. These reactions can result in surface defects and a decrease in carbon content, thereby impacting the final properties of the alloy. Consequently, careful control of protective atmospheres or heat treatment environments is necessary to prevent such issues. Moreover, the size and shape of components made from special steel alloys can pose challenges during heat treatment. Large or intricately shaped components require careful consideration of heating and cooling methods to ensure uniformity in microstructure and properties throughout the entire component. This may involve the use of specialized furnaces, fixtures, or heat treatment cycles to overcome these challenges. In conclusion, the challenges involved in heat treating special steel alloys encompass achieving the desired microstructure and mechanical properties, controlling heating and cooling rates, managing hardenability, preventing oxidation and decarburization, and addressing the size and shape of components. Overcoming these challenges demands a comprehensive understanding of the alloy's composition, properties, and the application of appropriate heat treatment techniques.

Q:What are the different surface hardening techniques for special steel parts?: Special steel parts can undergo various surface hardening techniques, each with its own advantages and characteristics. Some commonly used techniques include: 1. Carburizing: This technique involves heating the steel part in a carbon-rich atmosphere to introduce carbon into its surface. The result is a hardened outer layer with high carbon content, while the core remains tough and ductile. Carburizing improves wear resistance and overall strength. 2. Nitriding: Nitriding diffuses nitrogen into the steel part's surface, forming nitrides. This creates a hard and wear-resistant surface layer with improved fatigue strength. Nitriding can be done at lower temperatures, reducing the risk of distortion or dimensional changes. 3. Induction Hardening: By using high-frequency induction heating, this technique selectively heats the steel part's surface. Rapid quenching follows, resulting in a hardened outer layer. With induction hardening, precise control over hardened depth is possible, and it can be applied to specific areas to enhance wear resistance and strength. 4. Flame Hardening: Here, the steel part's surface is heated using an oxy-acetylene or oxy-propane flame. Quick quenching follows, leading to a hardened surface layer. Flame hardening is commonly used for large or irregularly shaped parts, offering excellent wear resistance. 5. Laser Hardening: This technique utilizes a high-intensity laser beam to heat and rapidly cool the steel part's surface. It allows precise control over the hardened area and depth, minimizing distortion and maintaining tight tolerances. Laser hardening is particularly effective for small, complex parts or localized hardening requirements. By choosing the appropriate method, manufacturers can enhance the durability, strength, and performance of special steel parts in diverse applications.

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