Alloy Steel 100cr6/52100/GCr15/SUJ2 Bearing Steel

Alloy Steel 100cr6/52100/GCr15/SUJ2 Bearing Steel

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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The details of our Steel

1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard

2. Produce processes: Smelt Iron -EAF smelt Billet - ESR smelt Billet -Hot rolled or forged get the steel round bar and plate

3. Heat treatment:

Normalized / Annealed / Quenched+Tempered

4. Quality assurance:

All order we can received Third party inspection, You can let SGS, BV,.. and others test company test and inspect our products before Goods shipping.

Product information

Chemical Composition(GB)%

C	Si	Mn	Cr	Cu	S
0.95-1.05	0.15-0.35	0.25-0.45	1.4-1.65	≤0.20	≤0.020

Heat Treatment

Item	Temperature ℃	Hardness
Anneal	790-810	170-207HB
Quenching	830-860	62-66HRC
Tempering	150-180	61-66HRC

Characterstics

1.Uniform hardness,Good abrasion resistance
2.High contact fatigue resistance
3.Cutting performance in general

1.Uniform hardness,Good abrasion resistance

2.High contact fatigue resistance

3.Cutting performance in general

Applications: Used to make the load of the larger small cross-section conditioning and stress smaller large parts

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Alloy Steel 100cr6/52100/GCr15/SUJ2 Bearing Steel

Q: What are the different surface defects in special steel?: Special steel can experience various surface defects. Some common defects include: 1. Scale, which is a layer of oxide that forms on the steel's surface during manufacturing. This can be caused by high temperatures or improper cooling, leading to a flaky or powdery appearance. The presence of scale can impact the quality and appearance of the steel. 2. Pitting refers to the development of small holes or depressions on the steel surface. It can be caused by corrosion, inadequate cleaning or surface preparation, or exposure to harsh environments. Pitting weakens the steel and makes it more prone to further corrosion. 3. Scratches are physical marks or indentations on the steel's surface. They can occur during handling, transportation, or processing. Scratches affect the integrity and appearance of the steel, often requiring repair or removal. 4. Roll marks are impressions or patterns left on the steel surface during the rolling process. Uneven pressure or improper alignment of rolling equipment can cause these marks, appearing as lines, grooves, or ridges. Roll marks impact the smoothness of the surface and may necessitate additional processing or polishing for removal. 5. Inclusions are foreign particles or substances embedded within the steel. They result from impurities in raw materials or contamination during manufacturing. Inclusions weaken the steel and have the potential to cause cracks or fractures. 6. Decarburization refers to the loss of carbon from the steel's surface layer. This can occur during heating or annealing processes, resulting in reduced hardness and strength. Decarburization is undesirable in special steel as it negatively affects performance. These are just a few examples of the surface defects that can occur in special steel. It is crucial to identify and address these defects to ensure the quality and performance of the steel product.

Q: What are the applications of special steel in the oil and gas manufacturing process?: Special steel has various applications in the oil and gas manufacturing process. It is commonly used in the construction of pipelines, offshore platforms, and equipment for drilling and extraction. Special steel's high strength and corrosion resistance properties make it ideal for handling the demanding conditions encountered in oil and gas operations. Additionally, it is used in the production of valves, pumps, and other critical components that require durability and reliability to ensure efficient and safe processes in the industry.

Q: How does special steel contribute to the thermal conductivity of products?: Special steel contributes to the thermal conductivity of products by having a higher thermal conductivity compared to other materials. This means that when special steel is used in the production of products, it allows for efficient transfer of heat, resulting in better heat distribution and dissipation.

Q: What is the role of special steel in the manufacturing of precision instruments?: The manufacturing of precision instruments heavily relies on the use of special steel. Precision instruments, like watches, surgical tools, measuring devices, and aerospace components, necessitate materials with exceptional qualities such as durability, strength, resistance to corrosion, and dimensional stability. Special steel is specifically designed to meet these demanding requirements due to its unique composition and properties. One of the main advantages of special steel is its high level of purity and uniformity. It goes through extensive refining and purification processes to eliminate impurities, ensuring consistent and reliable performance. This purity is crucial in precision instruments as it minimizes the risk of contamination, which could result in inaccuracies or malfunctions. Another essential characteristic of special steel is its exceptional strength and hardness. Precision instruments often encounter high levels of stress, pressure, or mechanical forces without deforming or failing. Special steel, with its superior strength, provides the necessary structural integrity and stability to these instruments, enabling them to maintain their accuracy and reliability over time. Furthermore, special steel demonstrates excellent resistance to corrosion, which is vital for precision instruments that may come into contact with moisture, chemicals, or other corrosive substances. Corrosion can degrade the surface finish and compromise the functionality of the instruments. Special steel's corrosion resistance ensures that the instruments can withstand harsh environments and continue to perform accurately. Additionally, special steel is highly machinable and can be shaped into intricate components with precise tolerances. Precision instruments often require intricate designs and parts that demand high precision in the manufacturing process. Special steel's machinability allows for the production of these complex components with utmost precision, guaranteeing the overall accuracy and functionality of the instruments. In conclusion, special steel plays a crucial role in the manufacturing of precision instruments. Its purity, strength, resistance to corrosion, and machinability make it an ideal material for producing high-quality instruments that can provide precise measurements, withstand demanding conditions, and maintain their accuracy over time. Without special steel, the production of precision instruments with such exceptional qualities would be significantly compromised.

Q: How does spring steel maintain its elasticity?: Spring steel maintains its elasticity due to its unique composition and manufacturing process. It is made from a high carbon steel alloy that undergoes heat treatment and quenching, which gives it its exceptional strength and flexibility. This heat treatment process called tempering allows the steel to retain its shape and bounce back to its original form after being deformed or subjected to external forces. The carbon content in spring steel also contributes to its elasticity by providing increased hardness and resistance to deformation. Overall, the combination of high carbon content, heat treatment, and quenching make spring steel highly durable and able to maintain its elasticity over extended periods of use.

Q: How is duplex stainless steel used in the oil and gas industry?: Duplex stainless steel is commonly used in the oil and gas industry due to its unique combination of strength, corrosion resistance, and cost-effectiveness. It is utilized in various applications such as pipelines, offshore platforms, and equipment for drilling, extraction, and refining processes. Its resistance to corrosion and high mechanical strength make it suitable for withstanding harsh operating conditions, including exposure to corrosive drilling fluids and high-pressure environments. Overall, duplex stainless steel plays a crucial role in ensuring the integrity and reliability of oil and gas operations.

Q: How are cobalt-based alloys used in dental applications?: Cobalt-based alloys are used in dental applications due to their unique properties such as high strength, corrosion resistance, and biocompatibility. They are commonly used in dental prosthesis, crowns, and bridges because they can withstand the harsh oral environment and provide long-term durability. Additionally, these alloys allow for precise and accurate fitting, ensuring optimal functionality and aesthetic appeal in dental restorations.

Q: How does the hardness of special steel affect its machinability?: The machinability of special steel is significantly influenced by its hardness. Generally, as the hardness of the steel increases, its machinability decreases. Machinability refers to how easily a material can be machined or shaped using various machining processes like cutting, drilling, or milling. Hardness denotes a material's resistance to indentation or scratching. It is typically measured using the Rockwell hardness scale or the Brinell hardness test. Special steel, known for its high strength and durability, usually possesses a higher hardness compared to other steel types. When machining special steel, encountering a harder material presents challenges for multiple reasons. Firstly, cutting harder materials requires greater cutting forces and generates more heat during the machining process, making them more difficult to cut. Consequently, this leads to increased tool wear and reduced tool life, resulting in higher production costs. Secondly, hard steel tends to have lower ductility and toughness, making it more susceptible to cracking or chipping during machining. As a consequence, poor surface finish, dimensional inaccuracies, and even component failure can occur. Furthermore, increased hardness in special steel also impacts chip formation. Harder materials tend to produce shorter and more segmented chips, which can cause problems with chip evacuation and tool clogging. This further hampers the machining process and affects overall productivity. To enhance the machinability of hard special steel, several strategies can be employed. Choosing appropriate cutting tools with specific geometries and coatings designed for hard materials is crucial. Additionally, optimizing cutting parameters such as cutting speed, feed rate, and depth of cut can help mitigate the negative effects of hardness on machinability. In conclusion, the hardness of special steel directly affects its machinability. As hardness increases, machinability decreases due to higher cutting forces, increased tool wear, reduced ductility, and chip formation challenges. However, by employing proper tool selection and optimizing cutting parameters, the machinability of hard special steel can be improved, enabling efficient and cost-effective machining processes.

Q: What are the different methods for quenching special steel?: Quenching is a critical step in the heat treatment process of special steel, as it helps to achieve the desired mechanical properties and improve the material's hardness and strength. There are several methods for quenching special steel, each with its own advantages and considerations. 1. Oil Quenching: This is one of the most commonly used methods for quenching special steel. The steel component is immersed in oil, which acts as a cooling medium. Oil quenching provides a moderate rate of cooling, allowing for controlled and uniform hardening. It is suitable for a wide range of steel grades and can prevent cracking or distortion. 2. Water Quenching: Water quenching is a faster cooling method compared to oil quenching. It provides rapid heat extraction, resulting in higher hardness and strength. However, the high cooling rate can also lead to increased risk of cracking or distortion, especially with thicker sections. Water quenching is commonly used for low-alloy steels and some high-alloy steels. 3. Polymer Quenching: Polymer quenching involves using a specialized polymer solution as the cooling medium. This method provides a controlled cooling rate, offering a balance between the slower oil quenching and faster water quenching. Polymer quenching can be particularly suitable for steels with complex shapes or critical dimensions, as it reduces the risk of distortion and cracking. 4. Air Quenching: Air quenching is a slower cooling method that involves allowing the steel component to cool in ambient air. It is typically used for steels with lower hardenability, as it provides a more gradual cooling rate. Air quenching can help to reduce the risk of distortion and cracking, but it may result in lower hardness and strength compared to other quenching methods. 5. Salt Bath Quenching: Salt bath quenching involves immersing the steel component in a molten salt bath as the cooling medium. This method provides a controlled and uniform cooling rate, reducing the risk of distortion and cracking. Salt bath quenching is particularly suitable for complex-shaped or delicate parts, as it minimizes the thermal stress during cooling. It is important to note that the choice of quenching method depends on various factors, such as the steel grade, desired hardness, component size and shape, and the required mechanical properties. Proper selection and implementation of the quenching method are crucial to achieving the desired material characteristics and ensuring the overall quality of the special steel product.

Q: What are the requirements for special steel used in aerospace defense applications?: The requirements for special steel used in aerospace defense applications include high strength, excellent corrosion resistance, heat resistance, and the ability to withstand extreme temperatures and pressure. It should also possess good weldability, fatigue resistance, and non-magnetic properties. Additionally, the steel should meet strict quality and certification standards to ensure reliability and safety in critical aerospace defense applications.

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