Hot Rolled High Quality Bearing Steel Bar
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 20 m.t.
- Supply Capability:
- 500 m.t./month
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Product Description:
OKorder is offering Hot rolled Bearing Special Steel Bar at great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to European, North American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
Our products have been used in all kinds of areas, such as aviation, aerospace, navigation, nuclear, energy, chemical industry, electronic information, petrochemical, automotive, instrument and meter, Communication ,transportation, and medical instruments, etc. Bearing ring,steel rolling mill ,machinery, 100Cr6 bearing steel ball is widely used in high-speed and low-noise bearing, bicycle, motorcycle, automobile, bags, electronics.
Product Advantages:
OKorder's Hot rolled Bearing Special Steel Bar are durable, strong, and resist corrosion.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Corrosion resistance
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
1. Dimensional sizes: Thickness: 14~100mm.Length:3000~5800mm,Diameter :14-500mm
2.Chemical composition:
3. Grade: SAE51200/ GCr15 / 100cr6
4. Heat Treatment:
Soft annealing: heat to 680-720°C, cool slowly.
Hardness after annealing: Max. 241 HB
Hardening: 820 - 850 °C
Normalizing temperature: 840-880°C
Tempering: 540-680°C
5. Surface requirements: Black, grinding, bright, polish
Packaging & Delivery of Bearing Steel
Mark: Heat No. will be cold stamped and Steel grade, diameter (mm), length (mm), and the manufacturer LOGO and weight (kg) is painted.
Standard seaworthy packing or as customer required
Delivery time: Within 30 days after order is confirmed.
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4: What makes stainless steel stainless?
A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.
- Q: What are the different surface coating methods used for special steel?
- There are several surface coating methods that are commonly used for special steel to enhance its properties and protect it from various environmental factors. These methods include: 1. Galvanizing: This is a process in which a layer of zinc is applied to the surface of the steel. It provides excellent corrosion resistance and can be done through hot-dip galvanizing or electroplating. 2. Electroplating: In this method, a thin layer of metal such as chromium, nickel, or copper is deposited onto the steel surface through an electrochemical process. This improves the steel's appearance, wear resistance, and corrosion resistance. 3. Powder coating: Powder coating involves applying a dry powder to the steel surface, which is then heated and fused to form a protective layer. It provides excellent durability, weather resistance, and aesthetic appeal. 4. Thermal spray coating: This method involves spraying a molten or heated material onto the steel surface, which then solidifies to form a protective coating. Materials commonly used for thermal spray coating include metals, ceramics, and polymers. 5. Paint coating: Painting is a commonly used method for surface coating. Different types of paints, such as epoxy, polyurethane, or acrylic, can be applied to the steel surface to provide protection against corrosion, chemicals, and UV radiation. 6. PVD coating: Physical Vapor Deposition (PVD) is a process in which a thin film of a material, such as titanium nitride or diamond-like carbon, is deposited onto the steel surface through a vacuum deposition process. PVD coatings enhance hardness, wear resistance, and appearance. 7. Anodizing: Anodizing is primarily used for aluminum, but it can also be applied to special steel. This process involves creating an oxide layer on the steel surface through an electrochemical reaction, which improves corrosion resistance and adds a decorative finish. These surface coating methods are essential for special steel as they provide enhanced protection against corrosion, wear, and other environmental factors, thereby extending the lifespan and improving the performance of the steel. The choice of coating method depends on the specific requirements and desired properties of the steel.
- Q: What are the main factors affecting the hardness of special steel?
- The hardness of special steel is influenced by various factors. Let's explore some of the key ones: 1. Carbon content plays a vital role in determining the hardness of steel. The addition of carbon, known as a hardening element, enhances the strength and hardness. Generally, higher carbon content leads to increased hardness. 2. The presence of alloying elements like chromium, manganese, nickel, and tungsten also impacts the hardness of special steel. These elements interact with the steel, forming compounds and solid solutions that enhance hardness and strength. 3. The hardness of steel is significantly affected by the heat treatment process. This involves subjecting the steel to specific heating and cooling cycles. Quenching, a rapid cooling process, transforms the microstructure of the steel, resulting in increased hardness. On the other hand, tempering reduces hardness while improving toughness. 4. The crystal structure of the steel can also influence its hardness. For instance, during quenching, the formation of martensite, a hard and brittle structure, increases hardness. Alternatively, crystal structures like ferrite or pearlite may exhibit lower hardness. 5. The size of grains within the steel's microstructure can impact its hardness. Smaller grain sizes generally lead to higher hardness due to improved strength and limited dislocation movement within the material. 6. Work hardening, which occurs through processes like rolling or forging, can increase the hardness of steel. This phenomenon happens when dislocations in the crystal lattice become trapped and hinder further dislocation movement, resulting in increased hardness. 7. The presence of impurities or non-metallic inclusions in steel can affect its hardness. These impurities can act as stress concentrators, reducing the material's hardness. To achieve the desired hardness for specific applications, it is crucial to consider and carefully control these factors during the manufacturing process of special steel.
- Q: What are the common challenges in heat treating special steel?
- Heat treating special steel poses a range of difficulties. One of the main challenges is to attain the desired hardness and strength while maintaining the desired microstructure. Special steels often necessitate specific heat treatment processes, such as quenching and tempering, to achieve the desired mechanical properties. However, the high alloy content in these steels can make it challenging to achieve uniform heat distribution and control the cooling rate during quenching, resulting in inconsistent hardness and potential distortion. Another obstacle in heat treating special steel is managing residual stresses. During the heating and cooling process, differential thermal expansion and contraction can cause stress to accumulate within the steel, potentially leading to cracking or distortion. To minimize these stresses, it is crucial to employ proper heat treatment techniques, such as preheating and controlled cooling rates. Special steels also require stringent cleanliness standards, as impurities or non-metallic inclusions can adversely affect their mechanical properties. Ensuring the cleanliness of the steel prior to heat treatment can be difficult and may entail additional steps, such as degreasing, pickling, or using protective atmospheres during heat treatment. Furthermore, some special steels are highly susceptible to overheating, which can result in grain growth and the loss of desired properties. To prevent overheating and ensure consistent outcomes, precise temperature control and monitoring are essential. Finally, heat treatment of special steels must take into account specific time-temperature transformation (TTT) and continuous cooling transformation (CCT) characteristics. Understanding and adhering to the appropriate heating and cooling cycles are crucial for achieving the desired microstructure and properties. In conclusion, the challenges in heat treating special steel include achieving the desired hardness and microstructure, managing residual stresses, ensuring cleanliness, preventing overheating, and adhering to specific time-temperature transformation characteristics. Overcoming these challenges necessitates expertise, precise control, and strict adherence to heat treatment protocols.
- Q: Can special steel be used in marine applications?
- Yes, special steel can be used in marine applications. Special steel, also known as marine grade steel, is specifically designed to withstand the harsh conditions of marine environments. It possesses qualities such as high corrosion resistance, increased strength, and durability, making it suitable for various marine applications. Special steel is commonly used in the construction of ships, offshore structures, and marine equipment. Its ability to resist corrosion from saltwater, chemicals, and other environmental factors makes it an ideal choice for marine applications. Furthermore, special steel is also used in the production of propellers, shafts, and other components that require high tensile strength and resistance to fatigue. Overall, special steel is a reliable and effective material for marine applications due to its unique properties and ability to withstand the challenges posed by the marine environment.
- Q: How does special steel contribute to the manufacturing of industrial machinery?
- Special steel contributes to the manufacturing of industrial machinery by providing enhanced strength, durability, and resistance to wear and corrosion. It allows for the production of components that can withstand high temperatures, heavy loads, and harsh operating conditions. The unique properties of special steel enable the creation of precision parts, gears, bearings, and tools that are crucial for the efficient and reliable functioning of industrial machinery.
- Q: What are the requirements for special steel used in corrosive environments?
- The requirements for special steel used in corrosive environments include high resistance to corrosion, especially against specific corrosive agents such as acids, alkalis, or saline solutions. The steel should possess a strong passive film formation ability, preventing further corrosion. It should also have good mechanical properties, including high strength and toughness, to withstand the harsh conditions. Additionally, the steel must possess good welding and fabrication characteristics, as well as be cost-effective and readily available.
- Q: How does special steel contribute to the power transmission sector?
- The power transmission sector relies heavily on special steel due to its exceptional properties and performance characteristics. Special steel is highly valued for its strength and resilience, making it an ideal material for manufacturing various components of power transmission systems. For example, transmission towers require special steel for their stability and durability, even in extreme weather conditions. Additionally, special steel's resistance to corrosion is particularly advantageous in the power transmission sector. Power transmission equipment often faces harsh environments, such as high humidity, chemical pollutants, and saltwater exposure, which can speed up corrosion. By using special steel in the manufacturing process, the risk of corrosion-related failures is significantly reduced, ensuring a reliable and uninterrupted power transmission. Furthermore, special steel's excellent electrical conductivity makes it a perfect choice for conductors and cables used in power transmission. Efficient transfer of electrical energy is crucial to minimize power losses and optimize the transmission process. Special steel conductors offer low resistance to the flow of electricity, enabling efficient power transmission over long distances. Moreover, special steel is also employed in the production of transformers and other electrical equipment used in power transmission. The magnetic properties of special steel make it an excellent material for transformer cores, facilitating efficient energy conversion and minimizing energy losses during transmission. In summary, special steel greatly contributes to the power transmission sector by providing strength, corrosion resistance, electrical conductivity, and magnetic properties. These properties ensure the reliability, efficiency, and longevity of power transmission systems, ultimately supporting the uninterrupted supply of electricity to industries, businesses, and households.
- Q: How does special steel contribute to reducing product downtime due to repairs?
- Special steel contributes to reducing product downtime due to repairs by offering increased strength, durability, and resistance to wear and tear. With its unique properties, special steel can withstand harsh conditions and heavy usage, resulting in longer-lasting and more reliable products. This reduces the frequency and duration of repairs, minimizing the downtime experienced by the product and ultimately leading to increased productivity and efficiency.
- Q: How does special steel perform in cryogenic corrosion resistance?
- Special steel has excellent performance in cryogenic corrosion resistance. It is specifically designed to withstand low temperatures and resist the corrosive effects of cryogenic substances. This type of steel exhibits minimal degradation, maintaining its structural integrity and preventing corrosion, even in extreme cold environments.
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Hot Rolled High Quality Bearing Steel Bar
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 20 m.t.
- Supply Capability:
- 500 m.t./month
OKorder Service Pledge
OKorder Financial Service
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