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:Are there any international standards for special steel?
- Special steel is subject to international standards, which are established by the International Organization for Standardization (ISO). ISO develops and publishes a variety of standards that encompass different aspects of special steel, including its composition, properties, testing methods, and quality requirements. These standards ensure that special steel manufactured by various companies and countries adheres to the same minimum quality and performance criteria. Apart from ISO, other organizations and standards bodies, such as the American Society for Testing and Materials (ASTM) and the European Committee for Iron and Steel Standardization (ECISS), also have their own specific standards for special steel. These international standards establish a unified framework for the production, trade, and utilization of special steel across diverse industries and countries, promoting consistency, reliability, and quality assurance.
- Q:What are the key characteristics to consider when selecting special steel?
- When selecting special steel, there are several key characteristics that need to be considered. First and foremost is the composition of the steel. The specific elements and their proportions in the alloy play a crucial role in determining the steel's properties such as strength, hardness, and corrosion resistance. Different applications may require different compositions, so it is important to carefully evaluate the intended use and choose a composition that aligns with the desired performance. Another critical characteristic is the steel's mechanical properties. This includes factors such as tensile strength, yield strength, ductility, and toughness. These properties determine how the steel will perform under various loads and impacts, and it is crucial to select a steel with the appropriate mechanical properties for the specific application. Additionally, the steel's heat treatment capabilities should be considered. Special steels often undergo different heat treatment processes to enhance their properties. Factors such as hardenability, tempering ability, and the ability to retain hardness at high temperatures are important considerations when selecting special steel. Corrosion resistance is also a key characteristic, especially when the steel will be exposed to harsh environments or chemicals. Some special steels are designed to have excellent resistance to corrosion, making them suitable for applications in marine environments, chemical processing plants, or oil and gas industries. Other characteristics to consider include machinability, weldability, and cost. Machinability refers to the ease with which the steel can be cut, drilled, or shaped, while weldability determines how well the steel can be welded without compromising its properties. The cost of the steel is an important factor, as it should align with the budget constraints of the project. In summary, when selecting special steel, it is crucial to consider the composition, mechanical properties, heat treatment capabilities, corrosion resistance, machinability, weldability, and cost. By evaluating these key characteristics in relation to the specific application, one can make an informed decision and choose the most suitable special steel for the intended purpose.
- Q:What are the common alloys used in special steel?
- Some common alloys used in special steel include stainless steel (which contains chromium and nickel), tool steel (which contains tungsten, molybdenum, and vanadium), and high-speed steel (which contains tungsten, molybdenum, and cobalt).
- Q:What are the different case hardening grades of special steel?
- There are several different case hardening grades of special steel, including but not limited to, 1018, 1020, 8620, and 9310. These grades are specifically formulated to provide increased strength and wear resistance by creating a hardened outer layer, or case, while maintaining a softer, more ductile core.
- Q:How does special steel perform in high-temperature oxidation?
- Special steel is specifically designed to have excellent performance in high-temperature oxidation. It has the ability to resist oxidation and maintain its mechanical properties even at elevated temperatures, making it highly reliable and durable in such conditions.
- Q:What are the applications of special steel in the food processing industry?
- Special steel has a wide range of applications in the food processing industry due to its unique properties and characteristics. One of the main applications of special steel in this industry is in the manufacturing of equipment and machinery used in food processing plants. Special steel is highly resistant to corrosion and can withstand extreme temperatures, making it ideal for use in food processing equipment that needs to be sanitized frequently and operate in harsh conditions. Special steel is commonly used in the production of blades, knives, and cutting tools used in food processing. The high strength and durability of special steel allow these tools to maintain their sharpness and effectiveness even after prolonged use, ensuring efficient and precise cutting of food products. Another application of special steel in the food processing industry is in the construction of storage tanks and containers. These tanks are used to store and transport various food products, and special steel's corrosion resistance and hygiene properties prevent contamination and ensure the quality and safety of the stored food. Additionally, special steel is also utilized in the construction of processing machinery such as mixers, grinders, and extruders. Its high strength and stability enable these machines to handle the rigorous demands of food processing, ensuring smooth operation and minimizing downtime. Furthermore, special steel is often employed in the production of conveyor systems used in food processing facilities. These conveyors are responsible for moving food products along the processing line, and special steel's resistance to wear and tear means that the conveyor systems can operate efficiently and reliably, reducing the risk of product contamination. In summary, the applications of special steel in the food processing industry are extensive and crucial. From manufacturing equipment to construction and storage, special steel's unique properties play a vital role in ensuring the efficiency, safety, and quality of food processing operations.
- Q:How does special steel contribute to the railway industry?
- The railway industry relies heavily on special steel to develop and maintain efficient and reliable rail systems. Special steel possesses unique properties, including high strength, durability, and resistance to wear and tear, that make it an ideal material for various components and structures within the railway infrastructure. One critical area where special steel plays a key role in the railway industry is rail manufacturing. Special steel rails are specifically designed to withstand heavy loads and intense usage, ensuring the safe and smooth movement of trains. These rails have exceptional resistance to wear, fatigue, and deformation, resulting in longer service life and reduced maintenance costs. Furthermore, special steel is utilized in the production of wheelsets, which are crucial components of trains. The exceptional strength and durability of special steel make it an excellent choice for wheelset manufacturing, guaranteeing reliable performance and minimizing the risk of derailments. The use of special steel in wheelsets also improves operational efficiency by reducing friction and enhancing energy transmission, leading to improved fuel economy and reduced environmental impact. Additionally, special steel is extensively used in the construction of bridges, tunnels, and other infrastructure elements within the railway network. These structures must endure heavy loads, extreme weather conditions, and various environmental factors. Special steel's outstanding strength, corrosion resistance, and longevity make it the preferred choice for such applications, ensuring the safety and reliability of rail systems. In conclusion, special steel significantly contributes to the railway industry by providing the necessary strength, durability, and resistance to wear and tear for various components and structures. Its usage in rails, wheelsets, and infrastructure elements enhances the efficiency, reliability, and safety of rail systems, ultimately benefiting passengers, freight transport, and the overall transportation sector.
- Q:Can special steel be used in the aerospace parts manufacturing industry?
- Yes, special steel can be used in the aerospace parts manufacturing industry. Special steel alloys, such as stainless steel and titanium alloys, possess properties like high strength, corrosion resistance, and heat resistance, making them suitable for use in critical aerospace components like engine parts, landing gears, and structural elements. Their ability to withstand extreme conditions, along with their lightweight nature, makes special steel a preferred choice in the aerospace industry to ensure safety, durability, and optimum performance of aircraft.
- Q:How does special steel contribute to the defense machinery industry?
- The defense machinery industry heavily relies on special steel due to its numerous advantages and contributions to the performance and durability of various defense equipment. To begin with, special steel possesses remarkable strength and toughness, making it ideal for manufacturing crucial components like armor plates, ballistic missiles, submarines, and tanks. These components need to withstand impact, penetration, and extreme conditions, all of which special steel can handle. This ensures the safety and protection of military personnel and assets. Additionally, special steel offers excellent corrosion resistance, a crucial characteristic for defense machinery used in harsh environments such as maritime operations or combat zones. Corrosion can weaken structures and compromise equipment functionality, but special steel's resistance helps maintain the integrity and longevity of defense machinery. This reduces maintenance costs and increases operational readiness. Furthermore, special steel enables the production of precision components with high dimensional stability, essential for advanced defense systems like aircraft, missiles, and radars. These components require exceptional accuracy and reliability to function optimally, and special steel's uniformity and consistency meet these demands. This ensures precise performance and enhances the overall capabilities of defense machinery. Moreover, special steel also contributes to weight reduction in defense machinery. As military equipment becomes more complex and technologically advanced, reducing weight while maintaining strength is crucial for enhancing mobility, fuel efficiency, and overall operational effectiveness. Special steel's high strength-to-weight ratio allows for the development of lighter defense machinery without compromising durability or protection. In conclusion, special steel's exceptional strength, corrosion resistance, dimensional stability, and weight reduction properties make it an indispensable material in the defense machinery industry. It enables the production of robust and reliable equipment, ensuring the safety and effectiveness of military operations and enhancing the overall capabilities of defense forces.
- Q:How is mold steel used in injection molding?
- Mold steel is used in injection molding to create the molds or tooling that are used to produce plastic parts. It is a durable and heat-resistant material that can withstand the high temperatures and pressures involved in the injection molding process. The mold steel is shaped into the desired mold design and then used to form the plastic material into the desired shape through injection molding. This allows for the mass production of plastic parts with high accuracy and repeatability.
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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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