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

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China main port
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Min Order Qty:
25 m.t.
Supply Capability:
10000 m.t./month
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Item specifice

Alloy Steel
Steel Round Bar
Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring
U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
Surface Treatment:
Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B)
Net Weight:
as required
as required
as required

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)%














Heat Treatment


Temperature ℃













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

Yes, special steel can be used for aerospace engine components.
Mold steel is known for its excellent hardness, wear resistance, and ability to withstand high temperatures. It possesses good machinability and can be easily polished or textured to create intricate mold designs. Mold steel also exhibits high toughness and dimensional stability, ensuring long-lasting and precise molds. Additionally, it is resistant to corrosion and offers good heat conductivity, making it suitable for various molding applications in industries such as automotive, aerospace, and consumer goods.
Structural steel, renowned for its exceptional properties and characteristics, has become a widely utilized material in the construction industry. Its main attributes encompass: 1. Strength: Boasting an impressive strength-to-weight ratio, structural steel endures heavy loads and forces without compromising its structural integrity. As a result, it proves to be a durable and dependable choice for a multitude of construction applications. 2. Flexibility: The malleability of structural steel lends itself to effortless fabrication into diverse shapes and sizes, catering to specific project needs. This inherent flexibility empowers architects and engineers to fashion distinctive and groundbreaking structures. 3. Fire resistance: Steel's remarkable resistance to fire renders it an invaluable selection for buildings where fire protection holds utmost importance, particularly in towering edifices. Being non-combustible, it neither ignites nor aids the spread of flames. 4. Sustainability: With its high recyclability, structural steel emerges as an environmentally conscious material. At the end of its lifespan, it can be repurposed or reused, minimizing waste and conserving precious natural resources. Moreover, energy-efficient designs can be incorporated into steel structures, further contributing to sustainability. 5. Cost-effectiveness: Structural steel presents an economically viable solution for construction ventures. Its widespread availability renders it more affordable compared to alternative building materials. Furthermore, its strength and durability translate into reduced expenses for maintenance and repairs in the long run. 6. Expedited construction: The fabrication of steel structures off-site, followed by swift on-site erection, expedites construction timelines. This expeditious process curtails project duration and costs, making structural steel an ideal choice for time-sensitive undertakings. 7. Design versatility: The robustness and flexibility of structural steel facilitate the realization of a broad spectrum of architectural designs. With minimal support columns, large and open spaces can be achieved, granting architects unparalleled freedom in their creations. Consequently, steel emerges as an enticing option for numerous building types, encompassing commercial, industrial, and institutional structures. In conclusion, the main attributes of structural steel encompass strength, flexibility, fire resistance, sustainability, cost-effectiveness, expedited construction, and design versatility. These qualities render it the preferred choice for construction projects worldwide.
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.
Corrosion-resistant stainless tool steel is used in the production of food processing equipment due to its ability to resist rust and corrosion caused by exposure to moisture, chemicals, and food acids. This steel is specifically designed to withstand the harsh conditions present in food processing environments, ensuring the equipment remains durable and hygienic. It is commonly used to manufacture blades, cutting tools, and various components of machines that come into direct contact with food. Its corrosion-resistant properties make it a reliable and safe choice for maintaining the quality and integrity of food during processing.
Special steel is known for its exceptional strength, durability, and versatility, which sets it apart from other high-performance materials. Compared to materials like aluminum, titanium, and composites, special steel often exhibits higher tensile strength, making it suitable for applications that require robustness and load-bearing capabilities. Additionally, special steel has excellent resistance to corrosion, heat, and wear, making it ideal for use in harsh environments or high-temperature applications. One advantage of special steel over other high-performance materials is its cost-effectiveness. Compared to materials like titanium, special steel is more affordable, making it a preferred choice for various industries. Moreover, the manufacturing process of special steel allows for customization, enabling the production of a wide range of grades and compositions to suit specific requirements. Special steel also offers excellent machinability and weldability, allowing for easy fabrication and assembly. Its versatility enables it to be used in a wide range of industries, including automotive, aerospace, construction, and energy. From structural components to precision tools, special steel provides a reliable and efficient solution. However, it is important to note that the choice of material depends on the specific application and its requirements. While special steel has numerous advantages, other high-performance materials may be more suitable for certain applications, such as lightweight components or extreme temperature conditions. Therefore, a comprehensive evaluation of the specific needs and characteristics of the application is necessary before determining the most appropriate material.
The impact of grain size on the mechanical properties of special steel is significant. Generally, a finer grain size enhances the strength, hardness, and toughness of the steel, while a coarser grain size can result in reduced mechanical properties. This is because a finer grain size provides more grain boundaries, which act as barriers to dislocation movement and contribute to strengthening the material. Additionally, finer grains promote better uniformity in the distribution of stress and strain, leading to improved mechanical performance. Therefore, controlling and optimizing the grain size is crucial in achieving the desired mechanical properties of special steel.
The excellent performance of special steel in cryogenic strength is well-known. Cryogenic strength refers to a material's capacity to endure extremely low temperatures while retaining its mechanical properties. Specifically engineered special steels, including stainless steels and nickel-based alloys, exhibit exceptional strength, toughness, and resistance to cracking at cryogenic temperatures. The special steel's distinctive composition and microstructure enable it to maintain its structural integrity and mechanical properties even under extremely cold conditions. These materials are designed to endure thermal stresses and brittleness that may occur at cryogenic temperatures, ensuring their reliability and performance in various applications. The critical importance of special steel's ability to excel in cryogenic strength is evident in industries such as aerospace, energy, and gas processing, where components are exposed to extremely low temperatures. For instance, the aerospace industry utilizes special steel in the construction of cryogenic fuel tanks and rocket engines, where it must withstand the extreme cold of space. Moreover, special steel's cryogenic strength proves advantageous in applications like liquefied natural gas (LNG) storage and transportation. The low temperatures involved in LNG processes necessitate materials that can endure thermal stresses while maintaining their strength and toughness. To summarize, special steel's unique composition and microstructure contribute to its exceptional performance in cryogenic strength. Its ability to endure extremely low temperatures without sacrificing mechanical properties makes it a reliable choice for applications in industries where cryogenic conditions are prevalent.
When welding special steel, there are several challenges that differ from welding regular carbon steel. Some common challenges in welding special steel include the following: 1. High carbon content: Special steels often have a high carbon content, which can increase hardness and brittleness. Achieving a proper weld without cracks or defects can be more difficult. 2. High alloy content: Special steels often contain various alloying elements like chromium, nickel, or molybdenum, which can affect weldability. These elements can introduce complexities, such as increased susceptibility to heat-affected zone (HAZ) cracking or the formation of brittle phases. 3. Heat sensitivity: Special steels are often more sensitive to heat during welding. Excessive heat can cause grain growth, reduced mechanical properties, or distortion of the welded structure. Therefore, careful control of heat input and preheating techniques may be necessary. 4. Pre-weld and post-weld treatments: Specific pre-weld and post-weld treatments may be required for special steels to ensure proper weld quality and performance. These treatments can include preheating, stress relieving, or post-weld heat treatment. Failure to follow these procedures can result in residual stresses or reduced mechanical properties. 5. Joint design and fit-up: The design and fit-up of the weld joint can also present challenges. Special steels may require specific joint configurations, such as a double-V or double-U groove, to ensure adequate penetration and fusion. Additionally, tight tolerances may be necessary to maintain desired mechanical properties. 6. Welding process selection: The choice of welding process can greatly impact the success of welding special steel. TIG or laser welding may be more suitable for high-alloy steels, while MIG or submerged arc welding may be better for specific applications. Selecting the appropriate welding process is crucial for achieving a sound weld with desired properties. To overcome these challenges, it is essential to thoroughly understand the specific type of special steel being welded and follow proper welding procedures and techniques. This may involve conducting pre-weld qualification tests, using suitable welding consumables, and ensuring proper heat control throughout the welding process. Additionally, working with experienced welders and seeking guidance from experts in special steel welding can effectively overcome these challenges.
Surgical instruments can indeed be made using special steel. This type of steel, also referred to as surgical steel or medical-grade steel, has been specifically engineered to meet the rigorous standards required for medical and surgical applications. With its exceptional resistance to corrosion, impressive strength and durability, and ability to endure repeated sterilization processes without compromising its properties, special steel is highly regarded. Surgical instruments crafted from this material are renowned for their accuracy, dependability, and capacity to maintain a sharp cutting edge. These instruments play a crucial role in a variety of surgical procedures, such as cutting, dissecting, manipulating, and suturing tissues. By utilizing special steel, surgical instruments can be guaranteed to be safe, hygienic, and appropriate for use within medical environments.

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