20Cr Steel Round Bar SAE520 Steel Round Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
20Cr Steel Round Bar SAE520 Steel Round Bar
Product Description:
1.Standard:40Cr,20Cr, 40CrMo4,SCM440,AISI4140, etc.
2.Diameter:25mm-450mm
3.Length:5.8/6m-12m or as required
4.Application:re-manufacture, structural steel etc.
5.Certificates:ISO9001:2008,ISO14001:2004,OHSAS18001
6.Packing: In bundles,Standard export sea-worthy packing or as customer's requirement
7.Shipment: by bulk or by container
8.Quality Contation
Both end of each bar must be cut.
Ladle furnanced and vacuum de-gassed
Show heat No. on each bar
Surface condition the surface of the hot rolled square bar shall befree cracks, scar and wrinkles that affect the use of the
billets. In case there is the above-mentioned defect, it shall be remove.
The mill test certificate shall show the chemical composition, and it is guaranteed that the chemical composition shall be
within the limit stipulated in the contract.
Chemical composition:
Grade | C | Si | Mn | Cr |
20Cr | 0.18-0.24 | 0.17-0.37 | 0.5-0.8 | 0.7-0.9 |
Specification:
OD | Length | Material | Standard | Technique |
16-260mm | 6-12m or aques per request | 20# | GB ASTM DIN | Hot rolled |
16-350mm | 45# | |||
200-500mm | 45# | Forged | ||
20-250mm | 20Cr,40Cr,20-42CrMo | Hot rolled | ||
50-300mm | GCr15 |
Application:
Hot rolled alloy structure steel round bar are widely used in machinery making, autombile making, railway, mine machinery, petoleum machinry, agricultural machinery and civil archtectue such as all kinds of shafts, screws, connecting rods, hardware tools, gears, standard parts, spanners fasteners, structural parts for automobile and agricultural machinery, outer and iner sleeves, rollers and balls for bearing making.
Product Show:
- Q: What are the different surface finishing methods used for special steel?
- There are several surface finishing methods used for special steel, each serving a specific purpose and achieving different results. Some of the common surface finishing methods for special steel include: 1. Grinding: Grinding is the process of using abrasive materials to remove excess material from the surface of the steel. It is typically used to achieve a smooth and polished finish, as well as to remove any imperfections or roughness. 2. Polishing: Polishing involves using polishing compounds and abrasive materials to create a smooth and shiny surface on the steel. This method is often used to enhance the aesthetic appeal of the steel and improve its corrosion resistance. 3. Shot blasting: Shot blasting is a technique that involves propelling small metal or mineral particles at high speeds onto the surface of the steel. This process helps to remove any contaminants, scale, or rust from the surface, resulting in a clean and uniform finish. 4. Electroplating: Electroplating is a process where a thin layer of metal is deposited onto the surface of the steel through an electrochemical reaction. This method is commonly used to enhance the appearance of the steel, improve its corrosion resistance, and provide a decorative or protective coating. 5. Passivation: Passivation is a chemical process that involves treating the surface of the steel with an acid solution to remove any impurities and create a passive, corrosion-resistant layer. This method is often used to improve the corrosion resistance of stainless steel and other alloys. 6. Coating: Coating is the process of applying a protective layer or coating onto the surface of the steel. This can include paints, lacquers, enamels, or other types of protective coatings that help to prevent corrosion, improve durability, or provide a specific aesthetic finish. It is important to note that the choice of surface finishing method for special steel depends on the desired outcome, such as aesthetics, corrosion resistance, or functionality. Additionally, the specific characteristics of the steel, such as its composition, hardness, and intended application, also play a significant role in determining the most suitable surface finishing method.
- Q: How does wear-resistant steel protect against abrasive wear?
- Wear-resistant steel protects against abrasive wear by having a high hardness and toughness, which allows it to withstand the abrasive forces and prevent material loss or surface damage. The steel's composition and heat treatment provide it with enhanced resistance to abrasive particles, reducing wear and extending the lifespan of the material.
- Q: What are the magnetic properties of special steel?
- Special steel can exhibit a range of magnetic properties depending on its composition and processing. It can be non-magnetic, weakly magnetic, or strongly magnetic. The specific magnetic properties of special steel can be tailored to meet specific requirements for different applications.
- Q: What are the main characteristics of structural steel forgings?
- Structural steel forgings possess several key characteristics that make them ideal for various applications in construction and engineering. Firstly, one of the main characteristics of structural steel forgings is their exceptional strength and durability. Steel is known for its high tensile strength, which allows it to withstand heavy loads and resist deformation under stress. This makes structural steel forgings suitable for supporting large structures and withstanding dynamic forces such as wind or seismic activity. Another important characteristic is the versatility of structural steel forgings. Steel can be fabricated into a wide range of shapes and sizes, making it adaptable for different design requirements. It can be forged into complex shapes with intricate details, allowing for precise and customized components to be created. This versatility enables structural steel forgings to be used in a variety of applications, from beams and columns in buildings to bridges and offshore structures. Additionally, structural steel forgings have excellent weldability. Steel can be easily joined together using various welding techniques, allowing for the creation of strong and reliable connections. This enhances the overall structural integrity of steel components and ensures their longevity. Another key characteristic of structural steel forgings is their cost-effectiveness. Steel is one of the most economical construction materials due to its abundance, recyclability, and ease of manufacturing. The production process for steel forgings is efficient and can be scaled up to meet large-scale construction projects, making it a cost-effective choice for many applications. Furthermore, structural steel forgings are known for their resistance to corrosion. Steel can be treated with coatings or alloys to enhance its resistance to rust and other forms of corrosion. This makes it suitable for use in environments with high humidity, exposure to saltwater, or harsh weather conditions. In conclusion, the main characteristics of structural steel forgings are their exceptional strength, versatility, weldability, cost-effectiveness, and resistance to corrosion. These characteristics make structural steel forgings a preferred choice for various construction and engineering applications, providing durability, reliability, and longevity to structures.
- Q: How does copper influence the characteristics of special steel?
- Copper has a significant influence on the characteristics of special steel due to its unique properties and its role as an alloying element. When added to steel in small amounts, copper can enhance its strength, hardness, and resistance to corrosion. One of the key benefits of copper in special steel is its ability to improve the steel's mechanical properties. Copper increases the strength and hardness of steel, making it more suitable for applications that require high tensile strength and durability. This is particularly important in industries such as construction, automotive, and aerospace, where strong and durable steel is essential. Furthermore, copper also enhances the steel's resistance to corrosion. It forms a protective oxide layer on the surface of the steel, preventing the formation of rust and other forms of corrosion. This makes copper-infused steel ideal for use in harsh environments or applications where exposure to moisture or corrosive substances is common. Additionally, copper can improve the machinability of special steel. It acts as a lubricant during the machining process, reducing friction and heat generation. This results in improved tool life, reduced energy consumption, and enhanced productivity. In summary, the addition of copper to special steel can significantly influence its characteristics. It enhances the steel's strength, hardness, and corrosion resistance, making it more suitable for demanding applications. Moreover, copper also improves the machinability of steel, leading to increased productivity and cost-effectiveness.
- Q: How does special steel contribute to the transportation equipment industry?
- Special steel plays a crucial role in the transportation equipment industry in several ways. Firstly, special steel alloys are used to manufacture various components of vehicles, such as engine parts, suspension systems, and transmission components. These alloys offer superior strength, durability, and corrosion resistance, ensuring that the vehicles can withstand harsh operating conditions and have a longer lifespan. Moreover, special steel is also employed in the production of railway tracks and infrastructure, contributing to the efficiency and safety of the transportation system. The high-quality steel used in railway tracks ensures stability, reduces maintenance requirements, and enhances the overall performance of the railways. In addition, special steel is utilized in the manufacturing of aircraft components, where precision, reliability, and lightness are of utmost importance. Steel alloys with exceptional mechanical properties are employed in critical parts like landing gear, engine components, and structural elements, ensuring the safety and efficiency of air transport. Furthermore, special steel is vital in the production of ships and marine vessels. The use of corrosion-resistant steel alloys in shipbuilding helps to prevent rusting, prolonging the lifespan of the vessels and reducing maintenance costs. Additionally, the high strength-to-weight ratio of certain steel alloys enables the construction of lighter ships, leading to increased fuel efficiency and reduced emissions. Overall, special steel's unique properties and characteristics make it an indispensable material in the transportation equipment industry. Its contribution to the sector includes enhancing the performance, safety, and durability of vehicles, railways, aircraft, and ships, ultimately improving the efficiency and reliability of transportation systems.
- Q: What are the emerging trends in special steel production?
- Some of the emerging trends in special steel production include the use of advanced technologies, such as additive manufacturing and automation, to enhance efficiency and precision in the production process. Additionally, there is a growing demand for eco-friendly and sustainable production methods, leading to the development of greener steelmaking processes. Furthermore, there is a focus on creating specialty steels with improved properties, such as higher strength, corrosion resistance, and heat resistance, to meet the evolving needs of various industries.
- Q: What are the main advantages of using special steel in aerospace applications?
- The main advantages of using special steel in aerospace applications are its superior strength, toughness, and corrosion resistance. Special steel can withstand extreme temperatures and pressures, making it suitable for critical components such as engine parts and landing gear. Its high strength-to-weight ratio allows for lighter aircraft designs, improving fuel efficiency and performance. Additionally, special steel's excellent fatigue resistance ensures the long-term reliability and safety of aerospace structures.
- Q: What are the challenges faced in the manufacturing process of special steel?
- The manufacturing process of special steel involves numerous challenges that need to be addressed to ensure the production of high-quality steel. Some of the main challenges faced in this process are: 1. Raw material selection: Special steels require specific alloying elements in precise proportions to achieve desired properties. Choosing the right raw materials is crucial, as it directly impacts the quality of the final product. Ensuring consistent availability and quality of these raw materials can be a challenge. 2. Alloy design and composition: Designing the alloy composition to meet specific requirements can be complex. Achieving the desired balance of strength, hardness, toughness, corrosion resistance, and other properties requires thorough research, testing, and expertise. Developing new alloys with improved properties can be particularly challenging. 3. Melting and refining: Special steels are typically produced through electric arc furnaces or induction melting. Maintaining precise temperature control, proper cooling rates, and refining processes to eliminate impurities like sulfur, phosphorus, and non-metallic inclusions are crucial. These steps require advanced technology and precise control to ensure consistent quality. 4. Heat treatment: Heat treatment is a critical step in the manufacturing process of special steel. Achieving the desired microstructure and properties through processes like quenching, tempering, annealing, or precipitation hardening can be challenging. Proper temperature control, heating and cooling rates, and time durations are essential for obtaining the desired properties. 5. Quality control and testing: Ensuring consistent quality throughout the manufacturing process is paramount. Regular testing and inspection to detect and eliminate defects, inconsistencies, and non-conformities are necessary. This includes dimensional accuracy, mechanical properties testing, non-destructive testing, and chemical analysis. 6. Production efficiency: Special steel manufacturing often involves complex procedures and longer processing times compared to regular steel production. Optimizing the production process to maximize efficiency, minimize waste, and reduce energy consumption is a constant challenge. Implementing lean manufacturing principles and utilizing advanced technologies can help address these challenges. 7. Environmental considerations: Manufacturing special steel can have a significant environmental impact. Addressing issues like energy consumption, waste management, emissions control, and water usage is essential for sustainable production. Compliance with environmental regulations and adopting eco-friendly practices can be challenging yet necessary. Overcoming these challenges requires a combination of technical expertise, research and development, investment in advanced equipment and technologies, and an ongoing commitment to quality control and process improvement.
- Q: What are the specific requirements for special steel used in the railway track industry?
- The safety, durability, and efficiency of railway tracks in the industry require special steel that meets specific requirements. Firstly, the steel used must possess high tensile strength to withstand the heavy loads and constant stress imposed by trains. This strength ensures the tracks maintain their shape and prevent deformation, allowing for smooth and stable train movement. Secondly, the steel must exhibit exceptional wear resistance due to the significant friction and wear between train wheels and tracks. It should withstand this wear and tear, minimizing the need for frequent maintenance and replacement. Thirdly, the steel must possess good fatigue resistance as trains exert repetitive loads on the tracks. Without adequate fatigue resistance, the steel may fail under cyclic loading, posing a risk of accidents. Fatigue resistance ensures the tracks remain intact and safe for extended periods. Furthermore, the steel must have high corrosion resistance to withstand exposure to various environmental and weather conditions. Moisture, temperature variations, and corrosive elements can cause rust and corrosion, making it vital for the steel to resist these effects. Additionally, the steel used in the railway track industry must meet specific dimensional and geometric requirements. This includes precise dimensions, straightness, and alignment to ensure proper installation and alignment of the tracks, enabling smooth and safe train operations. Overall, meeting the specific requirements for special steel in the railway track industry is crucial for ensuring safety, longevity, and efficiency. It allows for smooth and reliable train transportation, contributing to the overall success of the railway industry.
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20Cr Steel Round Bar SAE520 Steel Round Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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