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
You Might Also Like
Item specifice
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 future trends and innovations expected in special steel production?
- In the future, several trends and innovations are expected to shape the special steel production industry. Here are a few key areas where advancements are likely to occur: 1. Advanced Manufacturing Techniques: Special steel manufacturers are likely to adopt advanced manufacturing techniques such as additive manufacturing (3D printing) and digitalization. These technologies will facilitate the production of complex geometries, reduce waste, and enable customization of special steel products. 2. Sustainable Production: As environmental concerns continue to grow, there will be a focus on sustainable production methods in the special steel industry. This includes the adoption of energy-efficient processes, recycling and reusing materials, and minimizing the carbon footprint of steel production. 3. High-Strength and Lightweight Alloys: With the increasing demand for lightweight materials in various sectors like automotive and aerospace, special steel production is expected to focus on developing high-strength and lightweight alloys. These alloys will offer improved performance while reducing the weight of components, leading to fuel efficiency and enhanced sustainability. 4. Nanotechnology and Microstructural Engineering: Nanotechnology and microstructural engineering will play a significant role in enhancing the properties of special steels. By manipulating the material at the nanoscale, manufacturers can improve strength, toughness, corrosion resistance, and other characteristics. 5. Enhanced Surface Treatments: Advances in surface treatments, such as coatings, will contribute to the performance and longevity of special steel products. Innovative surface treatments will provide increased resistance to wear, corrosion, and heat, expanding the range of applications for special steels. 6. Digitalization and Data Analytics: The integration of digital technologies and data analytics will revolutionize special steel production. Smart factories with interconnected systems will enable real-time monitoring, predictive maintenance, and improved quality control, resulting in higher productivity and efficiency. 7. Automation and Robotics: Automation and robotics will continue to play a vital role in special steel production. Automated processes will optimize productivity, reduce human errors, and improve worker safety, thereby enhancing overall operational efficiency. 8. Industry 4.0 Integration: The special steel industry is expected to embrace Industry 4.0 principles, such as the Internet of Things (IoT) and artificial intelligence (AI). These technologies will enable seamless connectivity, intelligent decision-making, and predictive analysis, leading to improved productivity, cost-effectiveness, and competitiveness. Overall, the future of special steel production is likely to be driven by advancements in manufacturing techniques, sustainable practices, material engineering, digitalization, and automation. These innovations will not only enhance the performance and quality of special steel products but also contribute to a more sustainable and efficient industry.
- Q:How does special steel resist oxidation at high temperatures?
- Due to the presence of specific alloying elements and a carefully controlled manufacturing process, special steel is able to resist oxidation at high temperatures. When exposed to oxygen in the air, alloying elements like chromium, nickel, and aluminum form a protective oxide layer on the steel's surface. This layer acts as a barrier, preventing further oxidation. Of these alloying elements, chromium is particularly effective in forming a stable and dense chromium oxide layer. This layer serves as a self-healing mechanism, meaning that if it becomes damaged or scratched, it will quickly regenerate and continue to protect the steel from oxidation. The manufacturing process of special steel involves precise control of composition and heat treatment. This ensures that the steel has a fine and uniform microstructure, minimizing the presence of impurities or defects that could speed up oxidation. Moreover, the steel often undergoes various heat treatments, such as annealing or quenching, which further enhance its resistance to oxidation. In conclusion, the combination of alloying elements, controlled composition, and specific manufacturing processes allow special steel to withstand oxidation at high temperatures. This makes it an ideal choice for applications in industries like aerospace, power generation, and petrochemical.
- Q:What are the different types of tool steel?
- There are several types of tool steel, including carbon tool steel, alloy tool steel, high-speed tool steel, and hot work tool steel. Each type has its unique composition and characteristics that make it suitable for specific applications in the manufacturing and tooling industry.
- Q:What are the different forming techniques for special steel?
- There are several different forming techniques for special steel, including hot forming, cold forming, and casting. Hot forming involves heating the steel above its recrystallization temperature and shaping it into the desired form using tools or dies. Cold forming, on the other hand, involves manipulating the steel below its recrystallization temperature, often through processes like rolling, bending, or extrusion. Casting is another common technique, where molten steel is poured into a mold and allowed to solidify into the desired shape. Each technique has its own advantages and is chosen based on the specific requirements of the application.
- Q:How is special steel used in the chemical industry?
- Special steel is widely used in the chemical industry due to its excellent corrosion resistance properties. It is used to manufacture various equipment and components like storage tanks, pipes, valves, and reactors that come in contact with corrosive chemicals. Additionally, special steel's high strength and temperature resistance make it suitable for applications requiring robust and durable materials in chemical processing plants.
- Q:What are the properties of magnesium alloys?
- Magnesium alloys exhibit a combination of desirable properties, including low density, high strength-to-weight ratio, good corrosion resistance, excellent machinability, and high thermal conductivity. They also possess good damping capacity, making them suitable for applications requiring vibration reduction. Additionally, magnesium alloys can be easily cast, forged, and welded, allowing for a wide range of manufacturing processes. However, they are prone to ignite under certain conditions and can be more expensive compared to other metals.
- Q:How is special steel used in the textile industry?
- Special steel is used in the textile industry for various purposes such as manufacturing machinery components, needles, and cutting tools. It provides durability, strength, and resistance to wear and tear, ensuring the efficient operation of textile machinery and improving the overall production process. Additionally, special steel is utilized in the production of textile blades, which are crucial for precision cutting and shaping of fabrics.
- Q:What are the main advantages of using special steel in the mining industry?
- The main advantages of using special steel in the mining industry are its high strength and durability, which make it capable of withstanding the harsh conditions and heavy loads associated with mining operations. Special steel also offers excellent resistance to corrosion, abrasion, and impact, ensuring a longer lifespan for mining equipment and reducing maintenance costs. Additionally, special steel's superior heat resistance and toughness make it suitable for high-temperature applications, such as smelting and refining processes.
- Q:What are the specific requirements for special steel used in the railway sector?
- Ensuring the safety, durability, and efficient operation of railway infrastructure in the railway sector relies heavily on meeting the specific requirements for special steel. Some of the key requirements include: 1. Exceptional strength is essential for the special steel used in the railway sector to withstand heavy loads, vibrations, and impacts. This is crucial to maintain the structural integrity of tracks, bridges, and other components. 2. To minimize the need for frequent maintenance and replacement, special steel must have excellent wear resistance as railway tracks and wheels experience significant wear due to continuous contact and friction. 3. Railway components are subjected to constant cyclic loading, which demands high fatigue resistance in the steel. This ensures they can withstand repetitive stress and prevents fatigue failures. 4. Special steel must possess good corrosion resistance to prevent rusting and degradation, thereby ensuring a longer service life in the face of various environmental conditions such as moisture, extreme temperatures, and chemicals. 5. In certain applications like rail joints and fasteners, special steel is exposed to high temperatures due to friction and stresses. Good heat resistance is necessary for the steel to maintain its mechanical properties under such conditions. 6. Good weldability of special steel is essential to enable efficient and reliable joining of components during manufacturing and maintenance processes in the railway sector. 7. The steel must exhibit sufficient ductility and toughness to absorb energy and resist fracture in the event of a collision or impact, ensuring passenger safety. 8. Special steel used in the railway sector must maintain its dimensional stability under varying temperatures and loads to prevent deformation and ensure proper alignment of tracks and components. Meeting these specific requirements for special steel in the railway sector is crucial to ensure the safety, reliability, and longevity of railway infrastructure. This contributes to the smooth operation of the entire transport network.
- Q:What are the different welding techniques used for special steel?
- There are several welding techniques used for special steel, including Tungsten Inert Gas (TIG) welding, Metal Inert Gas (MIG) welding, Shielded Metal Arc Welding (SMAW), and Flux-Cored Arc Welding (FCAW). Each technique has its own advantages and disadvantages, and the choice of technique depends on factors such as the type of special steel, the thickness of the material, and the desired outcome of the welding process. TIG welding is commonly used for high-quality welds on thin materials, while MIG welding is suitable for thicker materials and higher production rates. SMAW is a versatile technique, suitable for various steel types and thicknesses, and FCAW is often used for outdoor applications and on thick materials.
1. Manufacturer Overview |
|
|---|---|
| Location | |
| Year Established | |
| Annual Output Value | |
| Main Markets | |
| Company Certifications | |
2. Manufacturer Certificates |
|
|---|---|
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period | |
3. Manufacturer Capability |
|
|---|---|
| a)Trade Capacity | |
| Nearest Port | |
| Export Percentage | |
| No.of Employees in Trade Department | |
| Language Spoken: | |
| b)Factory Information | |
| Factory Size: | |
| No. of Production Lines | |
| Contract Manufacturing | |
| Product Price Range | |
Send your message to us
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
Similar products
New products
Hot products
Related keywords
